Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

108 files changed, 16861 insertions, 0 deletions

diff --git a/toolkit/components/places/tests/unit/bookmarks.corrupt.html b/toolkit/components/places/tests/unit/bookmarks.corrupt.html
new file mode 100644
index 0000000000..3cf43367fb
--- /dev/null
+++ b/toolkit/components/places/tests/unit/bookmarks.corrupt.html
@@ -0,0 +1,36 @@
+<!DOCTYPE NETSCAPE-Bookmark-file-1>
+<!-- This is an automatically generated file.
+     It will be read and overwritten.
+     DO NOT EDIT! -->
+<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
+<TITLE>Bookmarks</TITLE>
+<H1 LAST_MODIFIED="1177541029">Bookmarks</H1>
+
+<DL><p>
+    <DT><H3 ID="rdf:#$ZvPhC3">Mozilla Firefox</H3>
+    <DL><p>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/firefox/help/" ICON="data:image/png;base64,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" ID="rdf:#$22iCK1">Help and Tutorials</A>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/firefox/customize/" ICON="data:image/png;base64,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" ID="rdf:#$32iCK1">Customize Firefox</A>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/firefox/community/" ICON="data:image/png;base64,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" ID="rdf:#$42iCK1">Get Involved</A>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/about/" ICON="data:image/png;base64,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" ID="rdf:#$52iCK1">About Us</A>
+        <DT><A HREF="b0rked" ICON="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAAHWSURBVHjaYvz//z8DJQAggJiQOe/fv2fv7Oz8rays/N+VkfG/iYnJfyD/1+rVq7ffu3dPFpsBAAHEAHIBCJ85c8bN2Nj4vwsDw/8zQLwKiO8CcRoQu0DxqlWrdsHUwzBAAIGJmTNnPgYa9j8UqhFElwPxf2MIDeIrKSn9FwSJoRkAEEAM0DD4DzMAyPi/G+QKY4hh5WAXGf8PDQ0FGwJ22d27CjADAAIIrLmjo+MXA9R2kAHvGBA2wwx6B8W7od6CeQcggKCmCEL8bgwxYCbUIGTDVkHDBia+CuotgACCueD3TDQN75D4xmAvCoK9ARMHBzAw0AECiBHkAlC0Mdy7x9ABNA3obAZXIAa6iKEcGlMVQHwWyjYuL2d4v2cPg8vZswx7gHyAAAK7AOif7SAbOqCmn4Ha3AHFsIDtgPq/vLz8P4MSkJ2W9h8ggBjevXvHDo4FQUQg/kdypqCg4H8lUIACnQ/SOBMYI8bAsAJFPcj1AAEEjwVQqLpAbXmH5BJjqI0gi9DTAAgDBBCcAVLkgmQ7yKCZxpCQxqUZhAECCJ4XgMl493ug21ZD+aDAXH0WLM4A9MZPXJkJIIAwTAR5pQMalaCABQUULttBGCCAGCnNzgABBgAMJ5THwGvJLAAAAABJRU5ErkJggg==" ID="rdf:#$52iCK1">About Us</A>
+    </DL><p>
+    <DT><H3 ADD_DATE="1177541020" LAST_MODIFIED="1177541050" ID="rdf:#$74Gpx2">test</H3>
+<DD>folder test comment
+    <DL><p>
+        <DT><A HREF="http://test/post" ADD_DATE="1177375336" LAST_MODIFIED="1177375423" SHORTCUTURL="test" WEB_PANEL="true" POST_DATA="hidden1%3Dbar&amp;text1%3D%25s" LAST_CHARSET="ISO-8859-1" ID="rdf:#$pYFe7">test post keyword</A>
+<DD>item description
+    </DL>
+    <DT><H3 UNFILED_BOOKMARKS_FOLDER="true">Unsorted Bookmarks</H3>
+    <DL><p>
+        <DT><A HREF="http://example.tld">Example.tld</A>
+    </DL><p>
+    <DT><H3 LAST_MODIFIED="1177541040" PERSONAL_TOOLBAR_FOLDER="true" ID="rdf:#$FvPhC3">Bookmarks Toolbar Folder</H3>
+<DD>Add bookmarks to this folder to see them displayed on the Bookmarks Toolbar
+    <DL><p>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/firefox/central/" ICON="data:image/png;base64,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" ID="rdf:#$GvPhC3">Getting Started</A>
+        <DT><A HREF="http://en-US.fxfeeds.mozilla.com/en-US/firefox/livebookmarks/" LAST_MODIFIED="1177541035" FEEDURL="http://en-US.fxfeeds.mozilla.com/en-US/firefox/headlines.xml" ID="rdf:#$HvPhC3">Latest Headlines</A>
+        <DT><A HREF="http://bogus-icon.mozilla.com/" ICON="b0rked" ID="rdf:#$GvPhC3">Getting Started</A>
+<DD>Livemark test comment
+    </DL><p>
+</DL><p>
diff --git a/toolkit/components/places/tests/unit/bookmarks.json b/toolkit/components/places/tests/unit/bookmarks.json
new file mode 100644
index 0000000000..27ed9ce5ca
--- /dev/null
+++ b/toolkit/components/places/tests/unit/bookmarks.json
@@ -0,0 +1,307 @@
+{
+  "guid": "root________",
+  "title": "",
+  "id": 1,
+  "dateAdded": 1361551978957783,
+  "lastModified": 1361551978957783,
+  "type": "text/x-moz-place-container",
+  "root": "placesRoot",
+  "children": [
+    {
+      "guid": "menu________",
+      "title": "Bookmarks Menu",
+      "id": 2,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1361551979382837,
+      "type": "text/x-moz-place-container",
+      "root": "bookmarksMenuFolder",
+      "children": [
+        {
+          "guid": "OCyeUO5uu9FF",
+          "title": "Mozilla Firefox",
+          "id": 6,
+          "parent": 2,
+          "dateAdded": 1361551979350273,
+          "lastModified": 1361551979376699,
+          "type": "text/x-moz-place-container",
+          "children": [
+            {
+              "guid": "OCyeUO5uu9FG",
+              "title": "Help and Tutorials",
+              "id": 7,
+              "parent": 6,
+              "dateAdded": 1361551979356436,
+              "lastModified": 1361551979362718,
+              "type": "text/x-moz-place",
+              "uri": "http://en-us.www.mozilla.com/en-US/firefox/help/",
+              "icon": "data:image/png;base64,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"
+            },
+            {
+              "guid": "OCyeUO5uu9FH",
+              "index": 1,
+              "title": "Customize Firefox",
+              "id": 8,
+              "parent": 6,
+              "dateAdded": 1361551979365662,
+              "lastModified": 1361551979368077,
+              "type": "text/x-moz-place",
+              "uri": "http://en-us.www.mozilla.com/en-US/firefox/customize/",
+              "icon": "data:image/png;base64,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"
+            },
+            {
+              "guid": "OCyeUO5uu9FJ",
+              "index": 3,
+              "title": "About Us",
+              "id": 10,
+              "parent": 6,
+              "dateAdded": 1361551979376699,
+              "lastModified": 1361551979379060,
+              "type": "text/x-moz-place",
+              "uri": "http://en-us.www.mozilla.com/en-US/about/",
+              "icon": "data:image/png;base64,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"
+            },
+            {
+              "guid": "OCyeUO5uu9FI",
+              "index": 2,
+              "title": "Get Involved",
+              "id": 9,
+              "parent": 6,
+              "dateAdded": 1361551979371071,
+              "lastModified": 1361551979373745,
+              "type": "text/x-moz-place",
+              "uri": "http://en-us.www.mozilla.com/en-US/firefox/community/",
+              "icon": "data:image/png;base64,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"
+            },
+            {
+              "guid": "QFM-QnE2ZpMz",
+              "title": "Test null postData",
+              "index": 4,
+              "dateAdded": 1481639510868000,
+              "lastModified": 1489563704300000,
+              "id": 17,
+              "charset": "UTF-8",
+              "annos": [
+                {
+                  "name": "bookmarkProperties/description",
+                  "flags": 0,
+                  "expires": 4,
+                  "value": "The best"
+                }
+              ],
+              "type": "text/x-moz-place",
+              "uri": "http://example.com/search?q=%s&suggid=",
+              "postData": null
+            }
+          ]
+        },
+        {
+          "guid": "OCyeUO5uu9FK",
+          "index": 1,
+          "title": "",
+          "id": 11,
+          "parent": 2,
+          "dateAdded": 1361551979380988,
+          "lastModified": 1361551979380988,
+          "type": "text/x-moz-place-separator"
+        },
+        {
+          "guid": "OCyeUO5uu9FL",
+          "index": 2,
+          "title": "test",
+          "id": 12,
+          "parent": 2,
+          "dateAdded": 1177541020000000,
+          "lastModified": 1177541050000000,
+          "annos": [
+            {
+              "name": "bookmarkProperties/description",
+              "flags": 0,
+              "expires": 4,
+              "mimeType": null,
+              "type": 3,
+              "value": "folder test comment"
+            }
+          ],
+          "type": "text/x-moz-place-container",
+          "children": [
+            {
+              "guid": "OCyeUO5uu9GX",
+              "title": "test post keyword",
+              "id": 13,
+              "parent": 12,
+              "dateAdded": 1177375336000000,
+              "lastModified": 1177375423000000,
+              "annos": [
+                {
+                  "name": "bookmarkProperties/description",
+                  "flags": 0,
+                  "expires": 4,
+                  "mimeType": null,
+                  "type": 3,
+                  "value": "item description"
+                },
+                {
+                  "name": "bookmarkProperties/loadInSidebar",
+                  "flags": 0,
+                  "expires": 4,
+                  "mimeType": null,
+                  "type": 1,
+                  "value": 1
+                }
+              ],
+              "type": "text/x-moz-place",
+              "uri": "http://test/post",
+              "keyword": "test",
+              "charset": "ISO-8859-1",
+              "postData": "hidden1%3Dbar&text1%3D%25s"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "index": 1,
+      "title": "Bookmarks Toolbar",
+      "id": 3,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1177541050000000,
+      "annos": [
+        {
+          "name": "bookmarkProperties/description",
+          "flags": 0,
+          "expires": 4,
+          "mimeType": null,
+          "type": 3,
+          "value": "Add bookmarks to this folder to see them displayed on the Bookmarks Toolbar"
+        }
+      ],
+      "type": "text/x-moz-place-container",
+      "root": "toolbarFolder",
+      "children": [
+        {
+          "guid": "OCyeUO5uu9FB",
+          "title": "Getting Started",
+          "id": 15,
+          "parent": 3,
+          "dateAdded": 1361551979409695,
+          "lastModified": 1361551979412080,
+          "type": "text/x-moz-place",
+          "uri": "http://en-us.www.mozilla.com/en-US/firefox/central/",
+          "icon": "data:image/png;base64,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"
+        },
+        {
+          "guid": "OCyeUO5uu9FR",
+          "index": 1,
+          "title": "Latest Headlines",
+          "id": 16,
+          "parent": 3,
+          "dateAdded": 1361551979451584,
+          "lastModified": 1361551979457086,
+          "livemark": 1,
+          "annos": [
+            {
+              "name": "livemark/feedURI",
+              "flags": 0,
+              "expires": 4,
+              "mimeType": null,
+              "type": 3,
+              "value": "http://en-us.fxfeeds.mozilla.com/en-US/firefox/headlines.xml"
+            },
+            {
+              "name": "livemark/siteURI",
+              "flags": 0,
+              "expires": 4,
+              "mimeType": null,
+              "type": 3,
+              "value": "http://en-us.fxfeeds.mozilla.com/en-US/firefox/livebookmarks/"
+            }
+          ],
+          "type": "text/x-moz-place-container",
+          "children": []
+        }
+      ]
+    },
+    {
+      "index": 2,
+      "title": "Tags",
+      "id": 4,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1361551978957783,
+      "type": "text/x-moz-place-container",
+      "root": "tagsFolder",
+      "children": []
+    },
+    {
+      "index": 3,
+      "title": "Unsorted Bookmarks",
+      "id": 5,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1177541050000000,
+      "type": "text/x-moz-place-container",
+      "root": "unfiledBookmarksFolder",
+      "children": [
+        {
+          "guid": "OCyeUO5uu9FW",
+          "title": "Example.tld",
+          "id": 14,
+          "parent": 5,
+          "dateAdded": 1361551979401846,
+          "lastModified": 1361551979402952,
+          "type": "text/x-moz-place",
+          "uri": "http://example.tld/"
+        },
+        {
+          "guid": "Cfkety492Afk",
+          "title": "test tagged bookmark",
+          "id": 15,
+          "parent": 5,
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "type": "text/x-moz-place",
+          "uri": "http://example.tld/tagged",
+          "tags": "foo"
+        },
+        {
+          "guid": "lOZGoFR1eXbl",
+          "title": "Bookmarks Toolbar Shortcut",
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "id": 16,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=TOOLBAR"
+        },
+        {
+          "guid": "7yJWnBVhjRtP",
+          "title": "Folder Shortcut",
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "id": 17,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=6"
+        },
+        {
+          "guid": "vm5QXWuWc12l",
+          "title": "Folder Shortcut 2",
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "id": 18,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=6123443"
+        },
+        {
+          "guid": "Icg1XlIozA1D",
+          "title": "Folder Shortcut 3",
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "id": 18,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=6&folder=BOOKMARKS_MENU"
+        }
+      ]
+    }
+  ]
+}
diff --git a/toolkit/components/places/tests/unit/bookmarks.preplaces.html b/toolkit/components/places/tests/unit/bookmarks.preplaces.html
new file mode 100644
index 0000000000..0ddf7725b4
--- /dev/null
+++ b/toolkit/components/places/tests/unit/bookmarks.preplaces.html
@@ -0,0 +1,36 @@
+<!DOCTYPE NETSCAPE-Bookmark-file-1>
+<!-- This is an automatically generated file.
+     It will be read and overwritten.
+     DO NOT EDIT! -->
+<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
+<TITLE>Bookmarks</TITLE>
+<H1 LAST_MODIFIED="1177541029">Bookmarks</H1>
+
+<DL><p>
+    <DT><H3 ID="rdf:#$ZvPhC3">Mozilla Firefox</H3>
+    <DL><p>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/firefox/help/" ICON="data:image/png;base64,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" ID="rdf:#$22iCK1">Help and Tutorials</A>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/firefox/customize/" ICON="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAAHWSURBVHjaYvz//z8DJQAggJiQOe/fv2fv7Oz8rays/N+VkfG/iYnJfyD/1+rVq7ffu3dPFpsBAAHEAHIBCJ85c8bN2Nj4vwsDw/8zQLwKiO8CcRoQu0DxqlWrdsHUwzBAAIGJmTNnPgYa9j8UqhFElwPxf2MIDeIrKSn9FwSJoRkAEEAM0DD4DzMAyPi/G+QKY4hh5WAXGf8PDQ0FGwJ22d27CjADAAIIrLmjo+MXA9R2kAHvGBA2wwx6B8W7od6CeQcggKCmCEL8bgwxYCbUIGTDVkHDBia+CuotgACCueD3TDQN75D4xmAvCoK9ARMHBzAw0AECiBHkAlC0Mdy7x9ABNA3obAZXIAa6iKEcGlMVQHwWyjYuL2d4v2cPg8vZswx7gHyAAAK7AOif7SAbOqCmn4Ha3AHFsIDtgPq/vLz8P4MSkJ2W9h8ggBjevXvHDo4FQUQg/kdypqCg4H8lUIACnQ/SOBMYI8bAsAJFPcj1AAEEjwVQqLpAbXmH5BJjqI0gi9DTAAgDBBCcAVLkgmQ7yKCZxpCQxqUZhAECCJ4XgMl493ug21ZD+aDAXH0WLM4A9MZPXJkJIIAwTAR5pQMalaCABQUULttBGCCAGCnNzgABBgAMJ5THwGvJLAAAAABJRU5ErkJggg==" ID="rdf:#$32iCK1">Customize Firefox</A>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/firefox/community/" ICON="data:image/png;base64,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" ID="rdf:#$42iCK1">Get Involved</A>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/about/" ICON="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAAHWSURBVHjaYvz//z8DJQAggJiQOe/fv2fv7Oz8rays/N+VkfG/iYnJfyD/1+rVq7ffu3dPFpsBAAHEAHIBCJ85c8bN2Nj4vwsDw/8zQLwKiO8CcRoQu0DxqlWrdsHUwzBAAIGJmTNnPgYa9j8UqhFElwPxf2MIDeIrKSn9FwSJoRkAEEAM0DD4DzMAyPi/G+QKY4hh5WAXGf8PDQ0FGwJ22d27CjADAAIIrLmjo+MXA9R2kAHvGBA2wwx6B8W7od6CeQcggKCmCEL8bgwxYCbUIGTDVkHDBia+CuotgACCueD3TDQN75D4xmAvCoK9ARMHBzAw0AECiBHkAlC0Mdy7x9ABNA3obAZXIAa6iKEcGlMVQHwWyjYuL2d4v2cPg8vZswx7gHyAAAK7AOif7SAbOqCmn4Ha3AHFsIDtgPq/vLz8P4MSkJ2W9h8ggBjevXvHDo4FQUQg/kdypqCg4H8lUIACnQ/SOBMYI8bAsAJFPcj1AAEEjwVQqLpAbXmH5BJjqI0gi9DTAAgDBBCcAVLkgmQ7yKCZxpCQxqUZhAECCJ4XgMl493ug21ZD+aDAXH0WLM4A9MZPXJkJIIAwTAR5pQMalaCABQUULttBGCCAGCnNzgABBgAMJ5THwGvJLAAAAABJRU5ErkJggg==" ID="rdf:#$52iCK1">About Us</A>
+    </DL><p>
+    <HR>
+    <DT><H3 ADD_DATE="1177541020" LAST_MODIFIED="1177541050" ID="rdf:#$74Gpx2">test</H3>
+<DD>folder test comment
+    <DL><p>
+        <DT><A HREF="http://test/post" ADD_DATE="1177375336" LAST_MODIFIED="1177375423" SHORTCUTURL="test" WEB_PANEL="true" POST_DATA="hidden1%3Dbar&amp;text1%3D%25s" LAST_CHARSET="ISO-8859-1" ID="rdf:#$pYFe7">test post keyword</A>
+<DD>item description
+    </DL>
+    <DT><H3 UNFILED_BOOKMARKS_FOLDER="true">Unsorted Bookmarks</H3>
+    <DL><p>
+        <DT><A HREF="http://example.tld">Example.tld</A>
+    </DL><p>
+    <DT><H3 LAST_MODIFIED="1177541040" PERSONAL_TOOLBAR_FOLDER="true" ID="rdf:#$FvPhC3">Bookmarks Toolbar Folder</H3>
+<DD>Add bookmarks to this folder to see them displayed on the Bookmarks Toolbar
+    <DL><p>
+        <DT><A HREF="http://en-US.www.mozilla.com/en-US/firefox/central/" ICON="data:image/png;base64,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" ID="rdf:#$GvPhC3">Getting Started</A>
+        <DT><A HREF="http://en-US.fxfeeds.mozilla.com/en-US/firefox/livebookmarks/" LAST_MODIFIED="1177541035" FEEDURL="http://en-US.fxfeeds.mozilla.com/en-US/firefox/headlines.xml" ID="rdf:#$HvPhC3">Latest Headlines</A>
+        <DT><A LAST_MODIFIED="1177541035" FEEDURL="http://en-US.fxfeeds.mozilla.com/en-US/firefox/headlines.xml" ID="rdf:#$HvPhC3">Latest Headlines No Site</A>
+<DD>Livemark test comment
+    </DL><p>
+</DL><p>
diff --git a/toolkit/components/places/tests/unit/bookmarks_corrupt.json b/toolkit/components/places/tests/unit/bookmarks_corrupt.json
new file mode 100644
index 0000000000..93f21d3ece
--- /dev/null
+++ b/toolkit/components/places/tests/unit/bookmarks_corrupt.json
@@ -0,0 +1,72 @@
+{
+  "guid": "root________",
+  "title": "",
+  "id": 1,
+  "dateAdded": 1361551978957783,
+  "lastModified": 1361551978957783,
+  "type": "text/x-moz-place-container",
+  "root": "placesRoot",
+  "children": [
+    {
+      "guid": "menu________",
+      "title": "Bookmarks Menu",
+      "id": 2,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1361551979382837,
+      "type": "text/x-moz-place-container",
+      "root": "bookmarksMenuFolder",
+      "children": [
+        {
+          "guid": "OCyeUO5uu9FG",
+          "title": "Help and Tutorials",
+          "id": 7,
+          "dateAdded": 1361551979356436,
+          "lastModified": 1361551979362718,
+          "type": "x/invalid",
+          "uri": "http://en-us.www.mozilla.com/en-US/firefox/help/"
+        },
+        {
+          "guid": "OCyeUO5uu9FH",
+          "index": 1,
+          "title": "Customize Firefox",
+          "id": 8,
+          "dateAdded": 1361551979365662,
+          "lastModified": 1361551979368077,
+          "type": "text/x-moz-place",
+          "uri": "http://en-us.www.mozilla.com/en-US/firefox/customize/"
+        },
+        {
+          "guid": "OCyeUO5uu9FG",
+          "title": "Bad URL",
+          "id": 9,
+          "dateAdded": 1361551979356436,
+          "lastModified": 1361551979362718,
+          "type": "text/x-moz-place",
+          "uri": "http:///"
+        }
+      ]
+    },
+    {
+      "guid": "toolbar_____",
+      "title": "Bookmarks Toolbar",
+      "id": 2,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1361551979382837,
+      "type": "text/x-moz-place-container",
+      "root": "toolbarFolder",
+      "children": [
+        {
+          "guid": "OCyeUO5uu9FG",
+          "title": "Bad URL",
+          "id": 9,
+          "dateAdded": 1361551979356436,
+          "lastModified": 1361551979362718,
+          "type": "text/x-moz-place",
+          "uri": "http:///"
+        }
+      ]
+    }
+  ]
+}
diff --git a/toolkit/components/places/tests/unit/bookmarks_html_localized.html b/toolkit/components/places/tests/unit/bookmarks_html_localized.html
new file mode 100644
index 0000000000..bc3bacc54d
--- /dev/null
+++ b/toolkit/components/places/tests/unit/bookmarks_html_localized.html
@@ -0,0 +1,21 @@
+<!DOCTYPE NETSCAPE-Bookmark-file-1>
+<!-- This is an automatically generated file.
+     It will be read and overwritten.
+     DO NOT EDIT! -->
+<HTML>
+<HEAD>
+<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
+<TITLE>Bookmarks</TITLE>
+<LINK REL="localization" HREF="bookmarks_html_localized.ftl">
+</HEAD>
+<BODY>
+<H1 LAST_MODIFIED="1177541029">Bookmarks</H1>
+
+<DL><p>
+    <DT><H3 ID="rdf:#$ZvPhC3" data-l10n-id="bookmarks-html-localized-folder">bookmarks-html-localized-folder</H3>
+    <DL><p>
+        <DT><A HREF="http://www.mozilla.com/firefox/help/" ICON="data:image/png;base64,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" ID="rdf:#$22iCK1" data-l10n-id="bookmarks-html-localized-bookmark">bookmarks-html-localized-bookmark</A>
+    </DL><p>
+</DL><p>
+</BODY>
+</HTML>
diff --git a/toolkit/components/places/tests/unit/bookmarks_html_singleframe.html b/toolkit/components/places/tests/unit/bookmarks_html_singleframe.html
new file mode 100644
index 0000000000..9fe662f320
--- /dev/null
+++ b/toolkit/components/places/tests/unit/bookmarks_html_singleframe.html
@@ -0,0 +1,10 @@
+<!DOCTYPE NETSCAPE-Bookmark-file-1>
+	<HTML>
+	<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
+	<Title>Bookmarks</Title>
+	<H1>Bookmarks</H1>
+    <DT><H3>Subtitle</H3>
+	<DL><p>
+		<DT><A HREF="http://www.mozilla.org/">Mozilla</A>
+    </DL><p>
+</HTML>
diff --git a/toolkit/components/places/tests/unit/bookmarks_iconuri.json b/toolkit/components/places/tests/unit/bookmarks_iconuri.json
new file mode 100644
index 0000000000..4059c1d53f
--- /dev/null
+++ b/toolkit/components/places/tests/unit/bookmarks_iconuri.json
@@ -0,0 +1,307 @@
+{
+  "guid": "root________",
+  "title": "",
+  "id": 1,
+  "dateAdded": 1361551978957783,
+  "lastModified": 1361551978957783,
+  "type": "text/x-moz-place-container",
+  "root": "placesRoot",
+  "children": [
+    {
+      "guid": "menu________",
+      "title": "Bookmarks Menu",
+      "id": 2,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1361551979382837,
+      "type": "text/x-moz-place-container",
+      "root": "bookmarksMenuFolder",
+      "children": [
+        {
+          "guid": "OCyeUO5uu9FF",
+          "title": "Mozilla Firefox",
+          "id": 6,
+          "parent": 2,
+          "dateAdded": 1361551979350273,
+          "lastModified": 1361551979376699,
+          "type": "text/x-moz-place-container",
+          "children": [
+            {
+              "guid": "OCyeUO5uu9FG",
+              "title": "Help and Tutorials",
+              "id": 7,
+              "parent": 6,
+              "dateAdded": 1361551979356436,
+              "lastModified": 1361551979362718,
+              "type": "text/x-moz-place",
+              "uri": "http://en-us.www.mozilla.com/en-US/firefox/help/",
+              "iconUri": "data:image/png;base64,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"
+            },
+            {
+              "guid": "OCyeUO5uu9FH",
+              "index": 1,
+              "title": "Customize Firefox",
+              "id": 8,
+              "parent": 6,
+              "dateAdded": 1361551979365662,
+              "lastModified": 1361551979368077,
+              "type": "text/x-moz-place",
+              "uri": "http://en-us.www.mozilla.com/en-US/firefox/customize/",
+              "iconUri": "data:image/png;base64,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"
+            },
+            {
+              "guid": "OCyeUO5uu9FJ",
+              "index": 3,
+              "title": "About Us",
+              "id": 10,
+              "parent": 6,
+              "dateAdded": 1361551979376699,
+              "lastModified": 1361551979379060,
+              "type": "text/x-moz-place",
+              "uri": "http://en-us.www.mozilla.com/en-US/about/",
+              "iconUri": "data:image/png;base64,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"
+            },
+            {
+              "guid": "OCyeUO5uu9FI",
+              "index": 2,
+              "title": "Get Involved",
+              "id": 9,
+              "parent": 6,
+              "dateAdded": 1361551979371071,
+              "lastModified": 1361551979373745,
+              "type": "text/x-moz-place",
+              "uri": "http://en-us.www.mozilla.com/en-US/firefox/community/",
+              "iconUri": "data:image/png;base64,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"
+            },
+            {
+              "guid": "QFM-QnE2ZpMz",
+              "title": "Test null postData",
+              "index": 4,
+              "dateAdded": 1481639510868000,
+              "lastModified": 1489563704300000,
+              "id": 17,
+              "charset": "UTF-8",
+              "annos": [
+                {
+                  "name": "bookmarkProperties/description",
+                  "flags": 0,
+                  "expires": 4,
+                  "value": "The best"
+                }
+              ],
+              "type": "text/x-moz-place",
+              "uri": "http://example.com/search?q=%s&suggid=",
+              "postData": null
+            }
+          ]
+        },
+        {
+          "guid": "OCyeUO5uu9FK",
+          "index": 1,
+          "title": "",
+          "id": 11,
+          "parent": 2,
+          "dateAdded": 1361551979380988,
+          "lastModified": 1361551979380988,
+          "type": "text/x-moz-place-separator"
+        },
+        {
+          "guid": "OCyeUO5uu9FL",
+          "index": 2,
+          "title": "test",
+          "id": 12,
+          "parent": 2,
+          "dateAdded": 1177541020000000,
+          "lastModified": 1177541050000000,
+          "annos": [
+            {
+              "name": "bookmarkProperties/description",
+              "flags": 0,
+              "expires": 4,
+              "mimeType": null,
+              "type": 3,
+              "value": "folder test comment"
+            }
+          ],
+          "type": "text/x-moz-place-container",
+          "children": [
+            {
+              "guid": "OCyeUO5uu9GX",
+              "title": "test post keyword",
+              "id": 13,
+              "parent": 12,
+              "dateAdded": 1177375336000000,
+              "lastModified": 1177375423000000,
+              "annos": [
+                {
+                  "name": "bookmarkProperties/description",
+                  "flags": 0,
+                  "expires": 4,
+                  "mimeType": null,
+                  "type": 3,
+                  "value": "item description"
+                },
+                {
+                  "name": "bookmarkProperties/loadInSidebar",
+                  "flags": 0,
+                  "expires": 4,
+                  "mimeType": null,
+                  "type": 1,
+                  "value": 1
+                }
+              ],
+              "type": "text/x-moz-place",
+              "uri": "http://test/post",
+              "keyword": "test",
+              "charset": "ISO-8859-1",
+              "postData": "hidden1%3Dbar&text1%3D%25s"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "index": 1,
+      "title": "Bookmarks Toolbar",
+      "id": 3,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1177541050000000,
+      "annos": [
+        {
+          "name": "bookmarkProperties/description",
+          "flags": 0,
+          "expires": 4,
+          "mimeType": null,
+          "type": 3,
+          "value": "Add bookmarks to this folder to see them displayed on the Bookmarks Toolbar"
+        }
+      ],
+      "type": "text/x-moz-place-container",
+      "root": "toolbarFolder",
+      "children": [
+        {
+          "guid": "OCyeUO5uu9FB",
+          "title": "Getting Started",
+          "id": 15,
+          "parent": 3,
+          "dateAdded": 1361551979409695,
+          "lastModified": 1361551979412080,
+          "type": "text/x-moz-place",
+          "uri": "http://en-us.www.mozilla.com/en-US/firefox/central/",
+          "iconUri": "data:image/png;base64,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"
+        },
+        {
+          "guid": "OCyeUO5uu9FR",
+          "index": 1,
+          "title": "Latest Headlines",
+          "id": 16,
+          "parent": 3,
+          "dateAdded": 1361551979451584,
+          "lastModified": 1361551979457086,
+          "livemark": 1,
+          "annos": [
+            {
+              "name": "livemark/feedURI",
+              "flags": 0,
+              "expires": 4,
+              "mimeType": null,
+              "type": 3,
+              "value": "http://en-us.fxfeeds.mozilla.com/en-US/firefox/headlines.xml"
+            },
+            {
+              "name": "livemark/siteURI",
+              "flags": 0,
+              "expires": 4,
+              "mimeType": null,
+              "type": 3,
+              "value": "http://en-us.fxfeeds.mozilla.com/en-US/firefox/livebookmarks/"
+            }
+          ],
+          "type": "text/x-moz-place-container",
+          "children": []
+        }
+      ]
+    },
+    {
+      "index": 2,
+      "title": "Tags",
+      "id": 4,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1361551978957783,
+      "type": "text/x-moz-place-container",
+      "root": "tagsFolder",
+      "children": []
+    },
+    {
+      "index": 3,
+      "title": "Unsorted Bookmarks",
+      "id": 5,
+      "parent": 1,
+      "dateAdded": 1361551978957783,
+      "lastModified": 1177541050000000,
+      "type": "text/x-moz-place-container",
+      "root": "unfiledBookmarksFolder",
+      "children": [
+        {
+          "guid": "OCyeUO5uu9FW",
+          "title": "Example.tld",
+          "id": 14,
+          "parent": 5,
+          "dateAdded": 1361551979401846,
+          "lastModified": 1361551979402952,
+          "type": "text/x-moz-place",
+          "uri": "http://example.tld/"
+        },
+        {
+          "guid": "Cfkety492Afk",
+          "title": "test tagged bookmark",
+          "id": 15,
+          "parent": 5,
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "type": "text/x-moz-place",
+          "uri": "http://example.tld/tagged",
+          "tags": "foo"
+        },
+        {
+          "guid": "lOZGoFR1eXbl",
+          "title": "Bookmarks Toolbar Shortcut",
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "id": 16,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=TOOLBAR"
+        },
+        {
+          "guid": "7yJWnBVhjRtP",
+          "title": "Folder Shortcut",
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "id": 17,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=6"
+        },
+        {
+          "guid": "vm5QXWuWc12l",
+          "title": "Folder Shortcut 2",
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "id": 18,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=6123443"
+        },
+        {
+          "guid": "Icg1XlIozA1D",
+          "title": "Folder Shortcut 3",
+          "dateAdded": 1507025843703345,
+          "lastModified": 1507025844703124,
+          "id": 18,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=6&folder=BOOKMARKS_MENU"
+        }
+      ]
+    }
+  ]
+}
diff --git a/toolkit/components/places/tests/unit/head_bookmarks.js b/toolkit/components/places/tests/unit/head_bookmarks.js
new file mode 100644
index 0000000000..5f6250aa5d
--- /dev/null
+++ b/toolkit/components/places/tests/unit/head_bookmarks.js
@@ -0,0 +1,30 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Import common head.
+{
+  /* import-globals-from ../head_common.js */
+  let commonFile = do_get_file("../head_common.js", false);
+  let uri = Services.io.newFileURI(commonFile);
+  Services.scriptloader.loadSubScript(uri.spec, this);
+}
+
+// Put any other stuff relative to this test folder below.
+const { AddonTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/AddonTestUtils.sys.mjs"
+);
+
+AddonTestUtils.init(this, false);
+AddonTestUtils.overrideCertDB();
+AddonTestUtils.createAppInfo(
+  "xpcshell@tests.mozilla.org",
+  "XPCShell",
+  "1",
+  "42"
+);
+
+add_task(async function setup() {
+  await AddonTestUtils.promiseStartupManager();
+});
diff --git a/toolkit/components/places/tests/unit/mobile_bookmarks_folder_import.json b/toolkit/components/places/tests/unit/mobile_bookmarks_folder_import.json
new file mode 100644
index 0000000000..930b7a8382
--- /dev/null
+++ b/toolkit/components/places/tests/unit/mobile_bookmarks_folder_import.json
@@ -0,0 +1,135 @@
+{
+  "guid": "root________",
+  "title": "",
+  "index": 0,
+  "dateAdded": 1475084731479000,
+  "lastModified": 1475084731479000,
+  "id": 1,
+  "type": "text/x-moz-place-container",
+  "root": "placesRoot",
+  "children": [
+    {
+      "guid": "menu________",
+      "title": "Bookmarks Menu",
+      "index": 0,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731768000,
+      "id": 2,
+      "type": "text/x-moz-place-container",
+      "root": "bookmarksMenuFolder",
+      "children": [
+        {
+          "guid": "X6lUyOspVYwi",
+          "title": "Test Pilot",
+          "index": 0,
+          "dateAdded": 1475084731768000,
+          "lastModified": 1475084731768000,
+          "id": 3,
+          "type": "text/x-moz-place",
+          "uri": "https://testpilot.firefox.com/"
+        },
+        {
+          "guid": "XF4yRP6bTuil",
+          "title": "Mobile bookmarks query",
+          "index": 1,
+          "dateAdded": 1475084731768000,
+          "lastModified": 1475084731768000,
+          "id": 11,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=101"
+        }
+      ]
+    },
+    {
+      "guid": "toolbar_____",
+      "title": "Bookmarks Toolbar",
+      "index": 1,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731742000,
+      "id": 4,
+      "type": "text/x-moz-place-container",
+      "root": "toolbarFolder",
+      "children": [
+        {
+          "guid": "buy7711R3ZgE",
+          "title": "MDN",
+          "index": 0,
+          "dateAdded": 1475084731769000,
+          "lastModified": 1475084731769000,
+          "id": 5,
+          "type": "text/x-moz-place",
+          "uri": "https://developer.mozilla.org"
+        }
+      ]
+    },
+    {
+      "guid": "3qmd_imziEBE",
+      "title": "Mobile Bookmarks",
+      "index": 5,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731770000,
+      "id": 101,
+      "annos": [
+        {
+          "name": "mobile/bookmarksRoot",
+          "flags": 0,
+          "expires": 4,
+          "value": 1
+        },
+        {
+          "name": "bookmarkProperties/description",
+          "flags": 0,
+          "expires": 4,
+          "mimeType": null,
+          "type": 3,
+          "value": "A description of the mobile folder that should be ignored on import"
+        }
+      ],
+      "type": "text/x-moz-place-container",
+      "children": [
+        {
+          "guid": "_o8e1_zxTJFg",
+          "title": "Get Firefox!",
+          "index": 0,
+          "dateAdded": 1475084731769000,
+          "lastModified": 1475084731769000,
+          "id": 7,
+          "type": "text/x-moz-place",
+          "uri": "http://getfirefox.com/"
+        },
+        {
+          "guid": "QCtSqkVYUbXB",
+          "title": "Get Thunderbird!",
+          "index": 1,
+          "dateAdded": 1475084731770000,
+          "lastModified": 1475084731770000,
+          "id": 8,
+          "type": "text/x-moz-place",
+          "uri": "http://getthunderbird.com/"
+        }
+      ]
+    },
+    {
+      "guid": "unfiled_____",
+      "title": "Other Bookmarks",
+      "index": 3,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731742000,
+      "id": 9,
+      "type": "text/x-moz-place-container",
+      "root": "unfiledBookmarksFolder",
+      "children": [
+        {
+          "guid": "KIa9iKZab2Z5",
+          "title": "Add-ons",
+          "index": 0,
+          "dateAdded": 1475084731769000,
+          "lastModified": 1475084731769000,
+          "id": 10,
+          "type": "text/x-moz-place",
+          "uri": "https://addons.mozilla.org"
+        }
+      ]
+    }
+  ]
+}
diff --git a/toolkit/components/places/tests/unit/mobile_bookmarks_folder_merge.json b/toolkit/components/places/tests/unit/mobile_bookmarks_folder_merge.json
new file mode 100644
index 0000000000..8d376bf69c
--- /dev/null
+++ b/toolkit/components/places/tests/unit/mobile_bookmarks_folder_merge.json
@@ -0,0 +1,101 @@
+{
+  "guid": "root________",
+  "title": "",
+  "index": 0,
+  "dateAdded": 1475084731479000,
+  "lastModified": 1475084731479000,
+  "id": 1,
+  "type": "text/x-moz-place-container",
+  "root": "placesRoot",
+  "children": [
+    {
+      "guid": "menu________",
+      "title": "Bookmarks Menu",
+      "index": 0,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731768000,
+      "id": 2,
+      "type": "text/x-moz-place-container",
+      "root": "bookmarksMenuFolder",
+      "children": [
+        {
+          "guid": "Utodo9b0oVws",
+          "title": "Firefox Accounts",
+          "index": 0,
+          "dateAdded": 1475084731955000,
+          "lastModified": 1475084731955000,
+          "id": 3,
+          "type": "text/x-moz-place",
+          "uri": "https://accounts.firefox.com/"
+        }
+      ]
+    },
+    {
+      "guid": "toolbar_____",
+      "title": "Bookmarks Toolbar",
+      "index": 1,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731742000,
+      "id": 4,
+      "type": "text/x-moz-place-container",
+      "root": "toolbarFolder"
+    },
+    {
+      "guid": "3qmd_imziEBE",
+      "title": "Mobile Bookmarks",
+      "index": 5,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731770000,
+      "id": 5,
+      "annos": [
+        {
+          "name": "mobile/bookmarksRoot",
+          "flags": 0,
+          "expires": 4,
+          "value": 1
+        },
+        {
+          "name": "bookmarkProperties/description",
+          "flags": 0,
+          "expires": 4,
+          "mimeType": null,
+          "type": 3,
+          "value": "A description of the mobile folder that should be ignored on import"
+        }
+      ],
+      "type": "text/x-moz-place-container",
+      "children": [
+        {
+          "guid": "a17yW6-nTxEJ",
+          "title": "Mozilla",
+          "index": 0,
+          "dateAdded": 1475084731959000,
+          "lastModified": 1475084731959000,
+          "id": 6,
+          "type": "text/x-moz-place",
+          "uri": "https://mozilla.org/"
+        },
+        {
+          "guid": "xV10h9Wi3FBM",
+          "title": "Bugzilla",
+          "index": 1,
+          "dateAdded": 1475084731961000,
+          "lastModified": 1475084731961000,
+          "id": 7,
+          "type": "text/x-moz-place",
+          "uri": "https://bugzilla.mozilla.org/"
+        }
+      ]
+    },
+    {
+      "guid": "unfiled_____",
+      "title": "Other Bookmarks",
+      "index": 3,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731742000,
+      "id": 8,
+      "type": "text/x-moz-place-container",
+      "root": "unfiledBookmarksFolder"
+    }
+  ]
+}
diff --git a/toolkit/components/places/tests/unit/mobile_bookmarks_multiple_folders.json b/toolkit/components/places/tests/unit/mobile_bookmarks_multiple_folders.json
new file mode 100644
index 0000000000..3c5cb63194
--- /dev/null
+++ b/toolkit/components/places/tests/unit/mobile_bookmarks_multiple_folders.json
@@ -0,0 +1,159 @@
+{
+  "guid": "root________",
+  "title": "",
+  "index": 0,
+  "dateAdded": 1475084731479000,
+  "lastModified": 1475084731479000,
+  "id": 1,
+  "type": "text/x-moz-place-container",
+  "root": "placesRoot",
+  "children": [
+    {
+      "guid": "menu________",
+      "title": "Bookmarks Menu",
+      "index": 0,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731768000,
+      "id": 2,
+      "type": "text/x-moz-place-container",
+      "root": "bookmarksMenuFolder",
+      "children": [
+        {
+          "guid": "buy7711R3ZgE",
+          "title": "MDN",
+          "index": 0,
+          "dateAdded": 1475084731769000,
+          "lastModified": 1475084731769000,
+          "id": 3,
+          "type": "text/x-moz-place",
+          "uri": "https://developer.mozilla.org"
+        },
+        {
+          "guid": "F_LBgd1fS_uQ",
+          "title": "Mobile bookmarks query for first folder",
+          "index": 1,
+          "dateAdded": 1475084731768000,
+          "lastModified": 1475084731768000,
+          "id": 11,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=101"
+        },
+        {
+          "guid": "oIpmQXMWsXvY",
+          "title": "Mobile bookmarks query for second folder",
+          "index": 2,
+          "dateAdded": 1475084731768000,
+          "lastModified": 1475084731768000,
+          "id": 12,
+          "type": "text/x-moz-place",
+          "uri": "place:folder=102"
+        }
+      ]
+    },
+    {
+      "guid": "3qmd_imziEBE",
+      "title": "Mobile Bookmarks",
+      "index": 5,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731770000,
+      "id": 101,
+      "annos": [
+        {
+          "name": "mobile/bookmarksRoot",
+          "flags": 0,
+          "expires": 4,
+          "value": 1
+        },
+        {
+          "name": "bookmarkProperties/description",
+          "flags": 0,
+          "expires": 4,
+          "mimeType": null,
+          "type": 3,
+          "value": "A description of the mobile folder that should be ignored on import"
+        }
+      ],
+      "type": "text/x-moz-place-container",
+      "children": [
+        {
+          "guid": "a17yW6-nTxEJ",
+          "title": "Mozilla",
+          "index": 0,
+          "dateAdded": 1475084731959000,
+          "lastModified": 1475084731959000,
+          "id": 5,
+          "type": "text/x-moz-place",
+          "uri": "https://mozilla.org/"
+        }
+      ]
+    },
+    {
+      "guid": "toolbar_____",
+      "title": "Bookmarks Toolbar",
+      "index": 1,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731742000,
+      "id": 6,
+      "type": "text/x-moz-place-container",
+      "root": "toolbarFolder",
+      "children": [
+        {
+          "guid": "Utodo9b0oVws",
+          "title": "Firefox Accounts",
+          "index": 0,
+          "dateAdded": 1475084731955000,
+          "lastModified": 1475084731955000,
+          "id": 7,
+          "type": "text/x-moz-place",
+          "uri": "https://accounts.firefox.com/"
+        }
+      ]
+    },
+    {
+      "guid": "o4YjJpgsufU-",
+      "title": "Mobile Bookmarks",
+      "index": 7,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731770000,
+      "id": 102,
+      "annos": [
+        { "name": "mobile/bookmarksRoot", "flags": 0, "expires": 4, "value": 1 }
+      ],
+      "type": "text/x-moz-place-container",
+      "children": [
+        {
+          "guid": "sSZ86WT9WbN3",
+          "title": "DXR",
+          "index": 0,
+          "dateAdded": 1475084731769000,
+          "lastModified": 1475084731769000,
+          "id": 9,
+          "type": "text/x-moz-place",
+          "uri": "https://dxr.mozilla.org"
+        }
+      ]
+    },
+    {
+      "guid": "unfiled_____",
+      "title": "Other Bookmarks",
+      "index": 3,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731742000,
+      "id": 10,
+      "type": "text/x-moz-place-container",
+      "root": "unfiledBookmarksFolder",
+      "children": [
+        {
+          "guid": "xV10h9Wi3FBM",
+          "title": "Bugzilla",
+          "index": 1,
+          "dateAdded": 1475084731961000,
+          "lastModified": 1475084731961000,
+          "id": 11,
+          "type": "text/x-moz-place",
+          "uri": "https://bugzilla.mozilla.org/"
+        }
+      ]
+    }
+  ]
+}
diff --git a/toolkit/components/places/tests/unit/mobile_bookmarks_root_import.json b/toolkit/components/places/tests/unit/mobile_bookmarks_root_import.json
new file mode 100644
index 0000000000..33908e1fea
--- /dev/null
+++ b/toolkit/components/places/tests/unit/mobile_bookmarks_root_import.json
@@ -0,0 +1,89 @@
+{
+  "guid": "root________",
+  "title": "",
+  "index": 0,
+  "dateAdded": 1475084731479000,
+  "lastModified": 1475084731479000,
+  "id": 1,
+  "type": "text/x-moz-place-container",
+  "root": "placesRoot",
+  "children": [
+    {
+      "guid": "menu________",
+      "title": "Bookmarks Menu",
+      "index": 0,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731768000,
+      "id": 2,
+      "type": "text/x-moz-place-container",
+      "root": "bookmarksMenuFolder",
+      "children": [
+        {
+          "guid": "X6lUyOspVYwi",
+          "title": "Test Pilot",
+          "index": 0,
+          "dateAdded": 1475084731768000,
+          "lastModified": 1475084731768000,
+          "id": 3,
+          "type": "text/x-moz-place",
+          "uri": "https://testpilot.firefox.com/"
+        }
+      ]
+    },
+    {
+      "guid": "toolbar_____",
+      "title": "Bookmarks Toolbar",
+      "index": 1,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731742000,
+      "id": 4,
+      "type": "text/x-moz-place-container",
+      "root": "toolbarFolder"
+    },
+    {
+      "guid": "unfiled_____",
+      "title": "Other Bookmarks",
+      "index": 3,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731742000,
+      "id": 5,
+      "type": "text/x-moz-place-container",
+      "root": "unfiledBookmarksFolder"
+    },
+    {
+      "guid": "mobile______",
+      "title": "Mobile Bookmarks",
+      "index": 4,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731770000,
+      "id": 6,
+      "annos": [
+        { "name": "mobile/bookmarksRoot", "flags": 0, "expires": 4, "value": 1 }
+      ],
+      "type": "text/x-moz-place-container",
+      "root": "mobileFolder",
+      "children": [
+        {
+          "guid": "_o8e1_zxTJFg",
+          "title": "Get Firefox!",
+          "index": 0,
+          "dateAdded": 1475084731769000,
+          "lastModified": 1475084731769000,
+          "id": 7,
+          "type": "text/x-moz-place",
+          "uri": "http://getfirefox.com/"
+        },
+        {
+          "guid": "QCtSqkVYUbXB",
+          "title": "Get Thunderbird!",
+          "index": 1,
+          "dateAdded": 1475084731770000,
+          "lastModified": 1475084731770000,
+          "id": 8,
+          "type": "text/x-moz-place",
+          "uri": "http://getthunderbird.com/"
+        }
+      ]
+    }
+  ]
+}
diff --git a/toolkit/components/places/tests/unit/mobile_bookmarks_root_merge.json b/toolkit/components/places/tests/unit/mobile_bookmarks_root_merge.json
new file mode 100644
index 0000000000..97af52c44a
--- /dev/null
+++ b/toolkit/components/places/tests/unit/mobile_bookmarks_root_merge.json
@@ -0,0 +1,89 @@
+{
+  "guid": "root________",
+  "title": "",
+  "index": 0,
+  "dateAdded": 1475084731479000,
+  "lastModified": 1475084731479000,
+  "id": 1,
+  "type": "text/x-moz-place-container",
+  "root": "placesRoot",
+  "children": [
+    {
+      "guid": "menu________",
+      "title": "Bookmarks Menu",
+      "index": 0,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731955000,
+      "id": 2,
+      "type": "text/x-moz-place-container",
+      "root": "bookmarksMenuFolder",
+      "children": [
+        {
+          "guid": "Utodo9b0oVws",
+          "title": "Firefox Accounts",
+          "index": 0,
+          "dateAdded": 1475084731955000,
+          "lastModified": 1475084731955000,
+          "id": 3,
+          "type": "text/x-moz-place",
+          "uri": "https://accounts.firefox.com/"
+        }
+      ]
+    },
+    {
+      "guid": "toolbar_____",
+      "title": "Bookmarks Toolbar",
+      "index": 1,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731938000,
+      "id": 4,
+      "type": "text/x-moz-place-container",
+      "root": "toolbarFolder"
+    },
+    {
+      "guid": "unfiled_____",
+      "title": "Other Bookmarks",
+      "index": 3,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731938000,
+      "id": 5,
+      "type": "text/x-moz-place-container",
+      "root": "unfiledBookmarksFolder"
+    },
+    {
+      "guid": "mobile______",
+      "title": "Mobile Bookmarks",
+      "index": 4,
+      "dateAdded": 1475084731479000,
+      "lastModified": 1475084731961000,
+      "id": 6,
+      "annos": [
+        { "name": "mobile/bookmarksRoot", "flags": 0, "expires": 4, "value": 1 }
+      ],
+      "type": "text/x-moz-place-container",
+      "root": "mobileFolder",
+      "children": [
+        {
+          "guid": "a17yW6-nTxEJ",
+          "title": "Mozilla",
+          "index": 0,
+          "dateAdded": 1475084731959000,
+          "lastModified": 1475084731959000,
+          "id": 7,
+          "type": "text/x-moz-place",
+          "uri": "https://mozilla.org/"
+        },
+        {
+          "guid": "xV10h9Wi3FBM",
+          "title": "Bugzilla",
+          "index": 1,
+          "dateAdded": 1475084731961000,
+          "lastModified": 1475084731961000,
+          "id": 8,
+          "type": "text/x-moz-place",
+          "uri": "https://bugzilla.mozilla.org/"
+        }
+      ]
+    }
+  ]
+}
diff --git a/toolkit/components/places/tests/unit/test_1085291.js b/toolkit/components/places/tests/unit/test_1085291.js
new file mode 100644
index 0000000000..b7ec4181f0
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_1085291.js
@@ -0,0 +1,48 @@
+add_task(async function () {
+  // test that nodes inserted by incremental update for bookmarks of all types
+  // have the extra bookmark properties (bookmarkGuid, dateAdded, lastModified).
+
+  // getFolderContents opens the root node.
+  let root = PlacesUtils.getFolderContents(
+    PlacesUtils.bookmarks.toolbarGuid
+  ).root;
+
+  async function insertAndTest(bmInfo) {
+    bmInfo = await PlacesUtils.bookmarks.insert(bmInfo);
+    let node = root.getChild(root.childCount - 1);
+    Assert.equal(node.bookmarkGuid, bmInfo.guid);
+    Assert.equal(node.dateAdded, bmInfo.dateAdded * 1000);
+    Assert.equal(node.lastModified, bmInfo.lastModified * 1000);
+  }
+
+  // Normal bookmark.
+  await insertAndTest({
+    parentGuid: root.bookmarkGuid,
+    type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
+    title: "Test Bookmark",
+    url: "http://test.url.tld",
+  });
+
+  // place: query
+  await insertAndTest({
+    parentGuid: root.bookmarkGuid,
+    type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
+    title: "Test Query",
+    url: `place:parent=${PlacesUtils.bookmarks.menuGuid}`,
+  });
+
+  // folder
+  await insertAndTest({
+    parentGuid: root.bookmarkGuid,
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    title: "Test Folder",
+  });
+
+  // separator
+  await insertAndTest({
+    parentGuid: root.bookmarkGuid,
+    type: PlacesUtils.bookmarks.TYPE_SEPARATOR,
+  });
+
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_1105208.js b/toolkit/components/places/tests/unit/test_1105208.js
new file mode 100644
index 0000000000..6b3f31f96a
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_1105208.js
@@ -0,0 +1,25 @@
+// Test that result node for folder shortcuts get the target folder title if
+// the shortcut itself has no title set.
+add_task(async function () {
+  let folder = await PlacesUtils.bookmarks.insert({
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "fake",
+  });
+
+  let shortcutInfo = await PlacesUtils.bookmarks.insert({
+    type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: `place:parent=${folder.guid}`,
+  });
+
+  let unfiledRoot = PlacesUtils.getFolderContents(
+    PlacesUtils.bookmarks.unfiledGuid
+  ).root;
+  let shortcutNode = unfiledRoot.getChild(unfiledRoot.childCount - 1);
+  Assert.equal(shortcutNode.bookmarkGuid, shortcutInfo.guid);
+
+  Assert.equal(shortcutNode.title, folder.title);
+
+  unfiledRoot.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_1105866.js b/toolkit/components/places/tests/unit/test_1105866.js
new file mode 100644
index 0000000000..c387d9e853
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_1105866.js
@@ -0,0 +1,77 @@
+add_task(async function test_folder_shortcuts() {
+  let shortcutInfo = await PlacesUtils.bookmarks.insert({
+    type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: `place:parent=${PlacesUtils.bookmarks.toolbarGuid}`,
+  });
+
+  let unfiledRoot = PlacesUtils.getFolderContents(
+    PlacesUtils.bookmarks.unfiledGuid
+  ).root;
+  let shortcutNode = unfiledRoot.getChild(unfiledRoot.childCount - 1);
+  Assert.strictEqual(
+    shortcutNode.itemId,
+    await PlacesTestUtils.promiseItemId(shortcutInfo.guid)
+  );
+  Assert.strictEqual(
+    PlacesUtils.asQuery(shortcutNode).folderItemId,
+    await PlacesTestUtils.promiseItemId(PlacesUtils.bookmarks.toolbarGuid)
+  );
+  Assert.strictEqual(shortcutNode.bookmarkGuid, shortcutInfo.guid);
+  Assert.strictEqual(
+    PlacesUtils.asQuery(shortcutNode).targetFolderGuid,
+    PlacesUtils.bookmarks.toolbarGuid
+  );
+
+  // test that a node added incrementally also behaves just as well.
+  shortcutInfo = await PlacesUtils.bookmarks.insert({
+    type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: `place:parent=${PlacesUtils.bookmarks.menuGuid}`,
+  });
+  shortcutNode = unfiledRoot.getChild(unfiledRoot.childCount - 1);
+  Assert.strictEqual(
+    shortcutNode.itemId,
+    await PlacesTestUtils.promiseItemId(shortcutInfo.guid)
+  );
+  Assert.strictEqual(
+    PlacesUtils.asQuery(shortcutNode).folderItemId,
+    await PlacesTestUtils.promiseItemId(PlacesUtils.bookmarks.menuGuid)
+  );
+  Assert.strictEqual(shortcutNode.bookmarkGuid, shortcutInfo.guid);
+  Assert.strictEqual(
+    PlacesUtils.asQuery(shortcutNode).targetFolderGuid,
+    PlacesUtils.bookmarks.menuGuid
+  );
+
+  unfiledRoot.containerOpen = false;
+});
+
+add_task(async function test_plain_folder() {
+  let folderInfo = await PlacesUtils.bookmarks.insert({
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+
+  let unfiledRoot = PlacesUtils.getFolderContents(
+    PlacesUtils.bookmarks.unfiledGuid
+  ).root;
+  let lastChild = unfiledRoot.getChild(unfiledRoot.childCount - 1);
+  Assert.strictEqual(lastChild.bookmarkGuid, folderInfo.guid);
+  Assert.strictEqual(
+    PlacesUtils.asQuery(lastChild).targetFolderGuid,
+    folderInfo.guid
+  );
+});
+
+add_task(async function test_non_item_query() {
+  let options = PlacesUtils.history.getNewQueryOptions();
+  let root = PlacesUtils.history.executeQuery(
+    PlacesUtils.history.getNewQuery(),
+    options
+  ).root;
+  Assert.strictEqual(root.itemId, -1);
+  Assert.strictEqual(PlacesUtils.asQuery(root).folderItemId, -1);
+  Assert.strictEqual(root.bookmarkGuid, "");
+  Assert.strictEqual(PlacesUtils.asQuery(root).targetFolderGuid, "");
+});
diff --git a/toolkit/components/places/tests/unit/test_1606731.js b/toolkit/components/places/tests/unit/test_1606731.js
new file mode 100644
index 0000000000..89e8ec0498
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_1606731.js
@@ -0,0 +1,21 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+let hs = PlacesUtils.history;
+
+/* Test for diacritic-insensitive history search */
+
+add_task(async function test_execute() {
+  const TEST_URL = "http://example.net/El_%C3%81rea_51";
+  const SEARCH_TERM = "area";
+  await PlacesTestUtils.addVisits(uri(TEST_URL));
+  let query = hs.getNewQuery();
+  query.searchTerms = SEARCH_TERM;
+  let options = hs.getNewQueryOptions();
+  let result = hs.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.ok(result.root.childCount == 1);
+});
diff --git a/toolkit/components/places/tests/unit/test_331487.js b/toolkit/components/places/tests/unit/test_331487.js
new file mode 100644
index 0000000000..2d4f5f8279
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_331487.js
@@ -0,0 +1,113 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Get history service
+try {
+  var histsvc = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+    Ci.nsINavHistoryService
+  );
+} catch (ex) {
+  do_throw("Could not get history service\n");
+}
+
+add_task(async function test_hierarchical_query() {
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.unfiledGuid,
+    children: [
+      {
+        title: "test folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            title: "1 title",
+            url: "http://a1.com/",
+          },
+          {
+            title: "subfolder 1",
+            type: PlacesUtils.bookmarks.TYPE_FOLDER,
+            children: [
+              {
+                title: "2 title",
+                url: "http://a2.com/",
+              },
+              {
+                title: "subfolder 2",
+                type: PlacesUtils.bookmarks.TYPE_FOLDER,
+                children: [
+                  {
+                    title: "3 title",
+                    url: "http://a3.com/",
+                  },
+                ],
+              },
+            ],
+          },
+        ],
+      },
+    ],
+  });
+
+  let [folderGuid, b1, sf1, b2, sf2, b3] = bookmarks.map(
+    bookmark => bookmark.guid
+  );
+
+  // bookmark query that should result in the "hierarchical" result
+  // because there is one query, one folder,
+  // no begin time, no end time, no domain, no uri, no search term
+  // and no max results.  See GetSimpleBookmarksQueryFolder()
+  // for more details.
+  var options = histsvc.getNewQueryOptions();
+  options.queryType = Ci.nsINavHistoryQueryOptions.QUERY_TYPE_BOOKMARKS;
+  var query = histsvc.getNewQuery();
+  query.setParents([folderGuid]);
+  var result = histsvc.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 2);
+  Assert.equal(root.getChild(0).bookmarkGuid, b1);
+  Assert.equal(root.getChild(1).bookmarkGuid, sf1);
+
+  // check the contents of the subfolder
+  var sf1Node = root.getChild(1);
+  sf1Node = sf1Node.QueryInterface(Ci.nsINavHistoryContainerResultNode);
+  sf1Node.containerOpen = true;
+  Assert.equal(sf1Node.childCount, 2);
+  Assert.equal(sf1Node.getChild(0).bookmarkGuid, b2);
+  Assert.equal(sf1Node.getChild(1).bookmarkGuid, sf2);
+
+  // check the contents of the subfolder's subfolder
+  var sf2Node = sf1Node.getChild(1);
+  sf2Node = sf2Node.QueryInterface(Ci.nsINavHistoryContainerResultNode);
+  sf2Node.containerOpen = true;
+  Assert.equal(sf2Node.childCount, 1);
+  Assert.equal(sf2Node.getChild(0).bookmarkGuid, b3);
+
+  sf2Node.containerOpen = false;
+  sf1Node.containerOpen = false;
+  root.containerOpen = false;
+
+  // bookmark query that should result in a flat list
+  // because we specified max results
+  options = histsvc.getNewQueryOptions();
+  options.queryType = Ci.nsINavHistoryQueryOptions.QUERY_TYPE_BOOKMARKS;
+  options.maxResults = 10;
+  query = histsvc.getNewQuery();
+  query.setParents([folderGuid]);
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 3);
+  Assert.equal(root.getChild(0).bookmarkGuid, b1);
+  Assert.equal(root.getChild(1).bookmarkGuid, b2);
+  Assert.equal(root.getChild(2).bookmarkGuid, b3);
+  root.containerOpen = false;
+
+  // XXX TODO
+  // test that if we have: more than one query,
+  // multiple folders, a begin time, an end time, a domain, a uri
+  // or a search term, that we get the (correct) flat list results
+  // (like we do when specified maxResults)
+});
diff --git a/toolkit/components/places/tests/unit/test_384370.js b/toolkit/components/places/tests/unit/test_384370.js
new file mode 100644
index 0000000000..cc760e3276
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_384370.js
@@ -0,0 +1,188 @@
+var tagData = [
+  { uri: uri("http://slint.us"), tags: ["indie", "kentucky", "music"] },
+  {
+    uri: uri("http://en.wikipedia.org/wiki/Diplodocus"),
+    tags: ["dinosaur", "dj", "rad word"],
+  },
+];
+
+var bookmarkData = [
+  { uri: uri("http://slint.us"), title: "indie,kentucky,music" },
+  {
+    uri: uri("http://en.wikipedia.org/wiki/Diplodocus"),
+    title: "dinosaur,dj,rad word",
+  },
+];
+
+/*
+  HTML+FEATURES SUMMARY:
+  - import legacy bookmarks
+  - export as json, import, test (tests integrity of html > json)
+  - export as html, import, test (tests integrity of json > html)
+
+  BACKUP/RESTORE SUMMARY:
+  - create a bookmark in each root
+  - tag multiple URIs with multiple tags
+  - export as json, import, test
+*/
+add_task(async function () {
+  // Remove eventual bookmarks.exported.json.
+  let jsonFile = PathUtils.join(
+    PathUtils.profileDir,
+    "bookmarks.exported.json"
+  );
+  await IOUtils.remove(jsonFile, { ignoreAbsent: true });
+
+  // Test importing a pre-Places canonical bookmarks file.
+  // Note: we do not empty the db before this import to catch bugs like 380999
+  let htmlFile = PathUtils.join(do_get_cwd().path, "bookmarks.preplaces.html");
+  await BookmarkHTMLUtils.importFromFile(htmlFile, { replace: true });
+
+  // Populate the database.
+  for (let { uri, tags } of tagData) {
+    PlacesUtils.tagging.tagURI(uri, tags);
+  }
+  for (let { uri, title } of bookmarkData) {
+    await PlacesUtils.bookmarks.insert({
+      parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+      url: uri,
+      title,
+    });
+  }
+  for (let { uri, title } of bookmarkData) {
+    await PlacesUtils.bookmarks.insert({
+      parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+      url: uri,
+      title,
+    });
+  }
+
+  await validate("initial database");
+
+  // Test exporting a Places canonical json file.
+  // 1. export to bookmarks.exported.json
+  await BookmarkJSONUtils.exportToFile(jsonFile);
+  info("exported json");
+
+  // 2. empty bookmarks db
+  // 3. import bookmarks.exported.json
+  await BookmarkJSONUtils.importFromFile(jsonFile, { replace: true });
+  info("imported json");
+
+  // 4. run the test-suite
+  await validate("re-imported json");
+  info("validated import");
+});
+
+async function validate(infoMsg) {
+  info(`Validating ${infoMsg}: testMenuBookmarks`);
+  await testMenuBookmarks();
+  info(`Validating ${infoMsg}: testToolbarBookmarks`);
+  await testToolbarBookmarks();
+  info(`Validating ${infoMsg}: testUnfiledBookmarks`);
+  testUnfiledBookmarks();
+  info(`Validating ${infoMsg}: testTags`);
+  testTags();
+  await PlacesTestUtils.promiseAsyncUpdates();
+}
+
+// Tests a bookmarks datastore that has a set of bookmarks, etc
+// that flex each supported field and feature.
+async function testMenuBookmarks() {
+  let root = PlacesUtils.getFolderContents(PlacesUtils.bookmarks.menuGuid).root;
+  Assert.equal(root.childCount, 3);
+
+  let separatorNode = root.getChild(1);
+  Assert.equal(separatorNode.type, separatorNode.RESULT_TYPE_SEPARATOR);
+
+  let folderNode = root.getChild(2);
+  Assert.equal(folderNode.type, folderNode.RESULT_TYPE_FOLDER);
+  Assert.equal(folderNode.title, "test");
+  let folder = await PlacesUtils.bookmarks.fetch(folderNode.bookmarkGuid);
+  Assert.equal(folder.dateAdded.getTime(), 1177541020000);
+
+  Assert.equal(PlacesUtils.asQuery(folderNode).hasChildren, true);
+
+  // open test folder, and test the children
+  folderNode.containerOpen = true;
+  Assert.equal(folderNode.childCount, 1);
+
+  let bookmarkNode = folderNode.getChild(0);
+  Assert.equal("http://test/post", bookmarkNode.uri);
+  Assert.equal("test post keyword", bookmarkNode.title);
+  Assert.equal(bookmarkNode.dateAdded, 1177375336000000);
+
+  let entry = await PlacesUtils.keywords.fetch({ url: bookmarkNode.uri });
+  Assert.equal("test", entry.keyword);
+  Assert.equal("hidden1%3Dbar&text1%3D%25s", entry.postData);
+
+  let pageInfo = await PlacesUtils.history.fetch(bookmarkNode.uri, {
+    includeAnnotations: true,
+  });
+  Assert.equal(
+    pageInfo.annotations.get(PlacesUtils.CHARSET_ANNO),
+    "ISO-8859-1",
+    "Should have the correct charset"
+  );
+
+  folderNode.containerOpen = false;
+  root.containerOpen = false;
+}
+
+async function testToolbarBookmarks() {
+  let root = PlacesUtils.getFolderContents(
+    PlacesUtils.bookmarks.toolbarGuid
+  ).root;
+
+  // child count (add 2 for pre-existing items, one of the feeds is skipped
+  // because it doesn't have href)
+  Assert.equal(root.childCount, bookmarkData.length + 2);
+
+  // Livemarks are no more supported but may still exist in old html files.
+  let legacyLivemarkNode = root.getChild(1);
+  Assert.equal("Latest Headlines", legacyLivemarkNode.title);
+  Assert.equal(
+    "http://en-us.fxfeeds.mozilla.com/en-US/firefox/livebookmarks/",
+    legacyLivemarkNode.uri
+  );
+  Assert.equal(
+    legacyLivemarkNode.type,
+    Ci.nsINavHistoryResultNode.RESULT_TYPE_URI
+  );
+
+  // test added bookmark data
+  let bookmarkNode = root.getChild(2);
+  Assert.equal(bookmarkNode.uri, bookmarkData[0].uri.spec);
+  Assert.equal(bookmarkNode.title, bookmarkData[0].title);
+  bookmarkNode = root.getChild(3);
+  Assert.equal(bookmarkNode.uri, bookmarkData[1].uri.spec);
+  Assert.equal(bookmarkNode.title, bookmarkData[1].title);
+
+  root.containerOpen = false;
+}
+
+function testUnfiledBookmarks() {
+  let root = PlacesUtils.getFolderContents(
+    PlacesUtils.bookmarks.unfiledGuid
+  ).root;
+  // child count (add 1 for pre-existing item)
+  Assert.equal(root.childCount, bookmarkData.length + 1);
+  for (let i = 1; i < root.childCount; ++i) {
+    let child = root.getChild(i);
+    Assert.equal(child.uri, bookmarkData[i - 1].uri.spec);
+    Assert.equal(child.title, bookmarkData[i - 1].title);
+    if (child.tags) {
+      Assert.equal(child.tags, bookmarkData[i - 1].title);
+    }
+  }
+  root.containerOpen = false;
+}
+
+function testTags() {
+  for (let { uri, tags } of tagData) {
+    info("Test tags for " + uri.spec + ": " + tags + "\n");
+    let foundTags = PlacesUtils.tagging.getTagsForURI(uri);
+    Assert.equal(foundTags.length, tags.length);
+    Assert.ok(tags.every(tag => foundTags.includes(tag)));
+  }
+}
diff --git a/toolkit/components/places/tests/unit/test_385397.js b/toolkit/components/places/tests/unit/test_385397.js
new file mode 100644
index 0000000000..7746b89657
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_385397.js
@@ -0,0 +1,152 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const TOTAL_SITES = 20;
+
+add_task(async function test_execute() {
+  let now = (Date.now() - 10000) * 1000;
+
+  for (let i = 0; i < TOTAL_SITES; i++) {
+    let site = "http://www.test-" + i + ".com/";
+    let testURI = uri(site);
+    let testImageURI = uri(site + "blank.gif");
+    let when = now + i * TOTAL_SITES * 1000;
+    await PlacesTestUtils.addVisits([
+      { uri: testURI, visitDate: when, transition: TRANSITION_TYPED },
+      {
+        uri: testImageURI,
+        visitDate: when + 1000,
+        transition: TRANSITION_EMBED,
+      },
+      {
+        uri: testImageURI,
+        visitDate: when + 2000,
+        transition: TRANSITION_FRAMED_LINK,
+      },
+      { uri: testURI, visitDate: when + 3000, transition: TRANSITION_LINK },
+    ]);
+  }
+
+  // verify our visits AS_VISIT, ordered by date descending
+  // including hidden
+  // we should get 80 visits:
+  // http://www.test-19.com/
+  // http://www.test-19.com/blank.gif
+  // http://www.test-19.com/
+  // http://www.test-19.com/
+  // ...
+  // http://www.test-0.com/
+  // http://www.test-0.com/blank.gif
+  // http://www.test-0.com/
+  // http://www.test-0.com/
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_DATE_DESCENDING;
+  options.resultType = options.RESULTS_AS_VISIT;
+  options.includeHidden = true;
+  let root = PlacesUtils.history.executeQuery(
+    PlacesUtils.history.getNewQuery(),
+    options
+  ).root;
+  root.containerOpen = true;
+  let cc = root.childCount;
+  // Embed visits are not added to the database, thus they won't appear.
+  Assert.equal(cc, 3 * TOTAL_SITES);
+  for (let i = 0; i < TOTAL_SITES; i++) {
+    let index = i * 3;
+    let node = root.getChild(index);
+    let site = "http://www.test-" + (TOTAL_SITES - 1 - i) + ".com/";
+    Assert.equal(node.uri, site);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+    node = root.getChild(++index);
+    Assert.equal(node.uri, site + "blank.gif");
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+    node = root.getChild(++index);
+    Assert.equal(node.uri, site);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+  }
+  root.containerOpen = false;
+
+  // verify our visits AS_VISIT, ordered by date descending
+  // we should get 40 visits:
+  // http://www.test-19.com/
+  // http://www.test-19.com/
+  // ...
+  // http://www.test-0.com/
+  // http://www.test-0.com/
+  options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_DATE_DESCENDING;
+  options.resultType = options.RESULTS_AS_VISIT;
+  root = PlacesUtils.history.executeQuery(
+    PlacesUtils.history.getNewQuery(),
+    options
+  ).root;
+  root.containerOpen = true;
+  cc = root.childCount;
+  // 2 * TOTAL_SITES because we count the TYPED and LINK, but not EMBED or FRAMED
+  Assert.equal(cc, 2 * TOTAL_SITES);
+  for (let i = 0; i < TOTAL_SITES; i++) {
+    let index = i * 2;
+    let node = root.getChild(index);
+    let site = "http://www.test-" + (TOTAL_SITES - 1 - i) + ".com/";
+    Assert.equal(node.uri, site);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+    node = root.getChild(++index);
+    Assert.equal(node.uri, site);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+  }
+  root.containerOpen = false;
+
+  // test our optimized query for the places menu
+  // place:type=0&sort=4&maxResults=10
+  // verify our visits AS_URI, ordered by date descending
+  // we should get 10 visits:
+  // http://www.test-19.com/
+  // ...
+  // http://www.test-10.com/
+  options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_DATE_DESCENDING;
+  options.maxResults = 10;
+  options.resultType = options.RESULTS_AS_URI;
+  root = PlacesUtils.history.executeQuery(
+    PlacesUtils.history.getNewQuery(),
+    options
+  ).root;
+  root.containerOpen = true;
+  cc = root.childCount;
+  Assert.equal(cc, options.maxResults);
+  for (let i = 0; i < cc; i++) {
+    let node = root.getChild(i);
+    let site = "http://www.test-" + (TOTAL_SITES - 1 - i) + ".com/";
+    Assert.equal(node.uri, site);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+  }
+  root.containerOpen = false;
+
+  // test without a maxResults, which executes a different query
+  // but the first 10 results should be the same.
+  // verify our visits AS_URI, ordered by date descending
+  // we should get 20 visits, but the first 10 should be
+  // http://www.test-19.com/
+  // ...
+  // http://www.test-10.com/
+  options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_DATE_DESCENDING;
+  options.resultType = options.RESULTS_AS_URI;
+  root = PlacesUtils.history.executeQuery(
+    PlacesUtils.history.getNewQuery(),
+    options
+  ).root;
+  root.containerOpen = true;
+  cc = root.childCount;
+  Assert.equal(cc, TOTAL_SITES);
+  for (let i = 0; i < 10; i++) {
+    let node = root.getChild(i);
+    let site = "http://www.test-" + (TOTAL_SITES - 1 - i) + ".com/";
+    Assert.equal(node.uri, site);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+  }
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_399266.js b/toolkit/components/places/tests/unit/test_399266.js
new file mode 100644
index 0000000000..6f99c710f8
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_399266.js
@@ -0,0 +1,82 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const TOTAL_SITES = 20;
+
+add_task(async function test_execute() {
+  let places = [];
+  for (let i = 0; i < TOTAL_SITES; i++) {
+    for (let j = 0; j <= i; j++) {
+      places.push({
+        uri: uri("http://www.test-" + i + ".com/"),
+        transition: TRANSITION_TYPED,
+      });
+      // because these are embedded visits, they should not show up on our
+      // query results.  If they do, we have a problem.
+      places.push({
+        uri: uri("http://www.hidden.com/hidden.gif"),
+        transition: TRANSITION_EMBED,
+      });
+      places.push({
+        uri: uri("http://www.alsohidden.com/hidden.gif"),
+        transition: TRANSITION_FRAMED_LINK,
+      });
+    }
+  }
+  await PlacesTestUtils.addVisits(places);
+
+  // test our optimized query for the "Most Visited" item
+  // in the "Smart Bookmarks" folder
+  // place:queryType=0&sort=8&maxResults=10
+  // verify our visits AS_URI, ordered by visit count descending
+  // we should get 10 visits:
+  // http://www.test-19.com/
+  // ...
+  // http://www.test-10.com/
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_VISITCOUNT_DESCENDING;
+  options.maxResults = 10;
+  options.resultType = options.RESULTS_AS_URI;
+  let root = PlacesUtils.history.executeQuery(
+    PlacesUtils.history.getNewQuery(),
+    options
+  ).root;
+  root.containerOpen = true;
+  let cc = root.childCount;
+  Assert.equal(cc, options.maxResults);
+  for (let i = 0; i < cc; i++) {
+    let node = root.getChild(i);
+    let site = "http://www.test-" + (TOTAL_SITES - 1 - i) + ".com/";
+    Assert.equal(node.uri, site);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+  }
+  root.containerOpen = false;
+
+  // test without a maxResults, which executes a different query
+  // but the first 10 results should be the same.
+  // verify our visits AS_URI, ordered by visit count descending
+  // we should get 20 visits, but the first 10 should be
+  // http://www.test-19.com/
+  // ...
+  // http://www.test-10.com/
+  options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_VISITCOUNT_DESCENDING;
+  options.resultType = options.RESULTS_AS_URI;
+  root = PlacesUtils.history.executeQuery(
+    PlacesUtils.history.getNewQuery(),
+    options
+  ).root;
+  root.containerOpen = true;
+  cc = root.childCount;
+  Assert.equal(cc, TOTAL_SITES);
+  for (let i = 0; i < 10; i++) {
+    let node = root.getChild(i);
+    let site = "http://www.test-" + (TOTAL_SITES - 1 - i) + ".com/";
+    Assert.equal(node.uri, site);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+  }
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_402799.js b/toolkit/components/places/tests/unit/test_402799.js
new file mode 100644
index 0000000000..f621911cce
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_402799.js
@@ -0,0 +1,60 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Get history services
+try {
+  var histsvc = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+    Ci.nsINavHistoryService
+  );
+} catch (ex) {
+  do_throw("Could not get history services\n");
+}
+
+// Get tagging service
+try {
+  var tagssvc = Cc["@mozilla.org/browser/tagging-service;1"].getService(
+    Ci.nsITaggingService
+  );
+} catch (ex) {
+  do_throw("Could not get tagging service\n");
+}
+
+add_task(async function test_query_only_returns_bookmarks_not_tags() {
+  const url = "http://foo.bar/";
+
+  // create 2 bookmarks on the same uri
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    title: "title 1",
+    url,
+  });
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "title 2",
+    url,
+  });
+  // add some tags
+  tagssvc.tagURI(uri(url), ["foo", "bar", "foobar", "foo bar"]);
+
+  // check that a generic bookmark query returns only real bookmarks
+  let options = histsvc.getNewQueryOptions();
+  options.queryType = Ci.nsINavHistoryQueryOptions.QUERY_TYPE_BOOKMARKS;
+
+  let query = histsvc.getNewQuery();
+  let result = histsvc.executeQuery(query, options);
+  let root = result.root;
+
+  root.containerOpen = true;
+  let cc = root.childCount;
+  Assert.equal(cc, 2);
+  let node1 = root.getChild(0);
+  node1 = await PlacesUtils.bookmarks.fetch(node1.bookmarkGuid);
+  Assert.equal(node1.parentGuid, PlacesUtils.bookmarks.menuGuid);
+  let node2 = root.getChild(1);
+  node2 = await PlacesUtils.bookmarks.fetch(node2.bookmarkGuid);
+  Assert.equal(node2.parentGuid, PlacesUtils.bookmarks.toolbarGuid);
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_412132.js b/toolkit/components/places/tests/unit/test_412132.js
new file mode 100644
index 0000000000..65653b5c0a
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_412132.js
@@ -0,0 +1,181 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * TEST DESCRIPTION:
+ *
+ * Tests patch to Bug 412132:
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=412132
+ */
+
+const TEST_URL0 = "http://example.com/";
+const TEST_URL1 = "http://example.com/1";
+const TEST_URL2 = "http://example.com/2";
+
+add_task(async function changeuri_unvisited_bookmark() {
+  info(
+    "After changing URI of bookmark, frecency of bookmark's " +
+      "original URI should be zero if original URI is unvisited and " +
+      "no longer bookmarked."
+  );
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark title",
+    url: TEST_URL1,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URL1,
+    }),
+    0,
+    "Bookmarked => frecency of URI should be != 0"
+  );
+
+  await PlacesUtils.bookmarks.update({
+    guid: bookmark.guid,
+    url: TEST_URL2,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URL1,
+    }),
+    0,
+    "Unvisited URI no longer bookmarked => frecency should = 0"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function changeuri_visited_bookmark() {
+  info(
+    "After changing URI of bookmark, frecency of bookmark's " +
+      "original URI should not be zero if original URI is visited."
+  );
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark title",
+    url: TEST_URL1,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URL1,
+    }),
+    0,
+    "Bookmarked => frecency of URI should be != 0"
+  );
+
+  await PlacesTestUtils.addVisits(TEST_URL1);
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  await PlacesUtils.bookmarks.update({
+    guid: bookmark.guid,
+    url: TEST_URL2,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URL1,
+    }),
+    0,
+    "*Visited* URI no longer bookmarked => frecency should != 0"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function changeuri_bookmark_still_bookmarked() {
+  info(
+    "After changing URI of bookmark, frecency of bookmark's " +
+      "original URI should not be zero if original URI is still " +
+      "bookmarked."
+  );
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark 1 title",
+    url: TEST_URL1,
+  });
+
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark 2 title",
+    url: TEST_URL1,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URL1,
+    }),
+    0,
+    "Bookmarked => frecency of URI should be != 0"
+  );
+
+  await PlacesUtils.bookmarks.update({
+    guid: bookmark.guid,
+    url: TEST_URL2,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  info("URI still bookmarked => frecency should != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URL2,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function changeuri_nonexistent_bookmark() {
+  // Try a bogus guid.
+  await Assert.rejects(
+    PlacesUtils.bookmarks.update({
+      guid: "ABCDEDFGHIJK",
+      url: TEST_URL2,
+    }),
+    /No bookmarks found for the provided GUID/,
+    "Changing the URI of a non-existent bookmark should fail."
+  );
+
+  // Now add a bookmark, delete it, and check.
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark title",
+    url: TEST_URL0,
+  });
+
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+
+  await Assert.rejects(
+    PlacesUtils.bookmarks.update({
+      guid: bookmark.guid,
+      url: TEST_URL2,
+    }),
+    /No bookmarks found for the provided GUID/,
+    "Changing the URI of a non-existent bookmark should fail."
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
diff --git a/toolkit/components/places/tests/unit/test_415460.js b/toolkit/components/places/tests/unit/test_415460.js
new file mode 100644
index 0000000000..3f0f7a1edb
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_415460.js
@@ -0,0 +1,37 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var hs = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+  Ci.nsINavHistoryService
+);
+
+/**
+ * Checks to see that a search has exactly one result in the database.
+ *
+ * @param aTerms
+ *        The terms to search for.
+ * @returns true if the search returns one result, false otherwise.
+ */
+function search_has_result(aTerms) {
+  var options = hs.getNewQueryOptions();
+  options.maxResults = 1;
+  options.resultType = options.RESULTS_AS_URI;
+  var query = hs.getNewQuery();
+  query.searchTerms = aTerms;
+  var result = hs.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  var cc = root.childCount;
+  root.containerOpen = false;
+  return cc == 1;
+}
+
+add_task(async function test_execute() {
+  const SEARCH_TERM = "ユニコード";
+  const TEST_URL = "http://example.com/" + SEARCH_TERM + "/";
+  await PlacesTestUtils.addVisits(uri(TEST_URL));
+  Assert.ok(search_has_result(SEARCH_TERM));
+});
diff --git a/toolkit/components/places/tests/unit/test_415757.js b/toolkit/components/places/tests/unit/test_415757.js
new file mode 100644
index 0000000000..a069bc6aa3
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_415757.js
@@ -0,0 +1,92 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Checks to see that a URI is in the database.
+ *
+ * @param aURI
+ *        The URI to check.
+ * @returns true if the URI is in the DB, false otherwise.
+ */
+function uri_in_db(aURI) {
+  var options = PlacesUtils.history.getNewQueryOptions();
+  options.maxResults = 1;
+  options.resultType = options.RESULTS_AS_URI;
+  var query = PlacesUtils.history.getNewQuery();
+  query.uri = aURI;
+  var result = PlacesUtils.history.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  var cc = root.childCount;
+  root.containerOpen = false;
+  return cc == 1;
+}
+
+const TOTAL_SITES = 20;
+
+// main
+add_task(async function test_execute() {
+  // add pages to global history
+  for (let i = 0; i < TOTAL_SITES; i++) {
+    let uri = "http://www.test-" + i + ".com/";
+    let when = Date.now() * 1000 + i * TOTAL_SITES;
+    await PlacesTestUtils.addVisits({ uri, visitDate: when });
+  }
+  for (let i = 0; i < TOTAL_SITES; i++) {
+    let uri = "http://www.test.com/" + i + "/";
+    let when = Date.now() * 1000 + i * TOTAL_SITES;
+    await PlacesTestUtils.addVisits({ uri, visitDate: when });
+  }
+
+  // set a page annotation on one of the urls that will be removed
+  var testAnnoDeletedURI = "http://www.test.com/1/";
+  var testAnnoDeletedName = "foo";
+  var testAnnoDeletedValue = "bar";
+  await PlacesUtils.history.update({
+    url: testAnnoDeletedURI,
+    annotations: new Map([[testAnnoDeletedName, testAnnoDeletedValue]]),
+  });
+
+  // set a page annotation on one of the urls that will NOT be removed
+  var testAnnoRetainedURI = "http://www.test-1.com/";
+  var testAnnoRetainedName = "foo";
+  var testAnnoRetainedValue = "bar";
+  await PlacesUtils.history.update({
+    url: testAnnoRetainedURI,
+    annotations: new Map([[testAnnoRetainedName, testAnnoRetainedValue]]),
+  });
+
+  // remove pages from www.test.com
+  await PlacesUtils.history.removeByFilter({ host: "www.test.com" });
+
+  // check that all pages in www.test.com have been removed
+  for (let i = 0; i < TOTAL_SITES; i++) {
+    let site = "http://www.test.com/" + i + "/";
+    let testURI = uri(site);
+    Assert.ok(!uri_in_db(testURI));
+  }
+
+  // check that all pages in www.test-X.com have NOT been removed
+  for (let i = 0; i < TOTAL_SITES; i++) {
+    let site = "http://www.test-" + i + ".com/";
+    let testURI = uri(site);
+    Assert.ok(uri_in_db(testURI));
+  }
+
+  // check that annotation on the removed item does not exists
+  await assertNoOrphanPageAnnotations();
+
+  // check that annotation on the NOT removed item still exists
+  let pageInfo = await PlacesUtils.history.fetch(testAnnoRetainedURI, {
+    includeAnnotations: true,
+  });
+
+  Assert.equal(
+    pageInfo.annotations.get(testAnnoRetainedName),
+    testAnnoRetainedValue,
+    "Should have kept the annotation for the non-removed items"
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_419792_node_tags_property.js b/toolkit/components/places/tests/unit/test_419792_node_tags_property.js
new file mode 100644
index 0000000000..53b0b74fce
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_419792_node_tags_property.js
@@ -0,0 +1,52 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// get services
+var histsvc = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+  Ci.nsINavHistoryService
+);
+var tagssvc = Cc["@mozilla.org/browser/tagging-service;1"].getService(
+  Ci.nsITaggingService
+);
+
+add_task(async function test_query_node_tags_property() {
+  // get toolbar node
+  var options = histsvc.getNewQueryOptions();
+  var query = histsvc.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.toolbarGuid]);
+  var result = histsvc.executeQuery(query, options);
+  var toolbarNode = result.root;
+  toolbarNode.containerOpen = true;
+
+  // add a bookmark
+  var bookmarkURI = uri("http://foo.com");
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "",
+    url: bookmarkURI,
+  });
+
+  // get the node for the new bookmark
+  var node = toolbarNode.getChild(toolbarNode.childCount - 1);
+  Assert.equal(node.bookmarkGuid, bookmark.guid);
+
+  // confirm there's no tags via the .tags property
+  Assert.equal(node.tags, null);
+
+  // add a tag
+  tagssvc.tagURI(bookmarkURI, ["foo"]);
+  Assert.equal(node.tags, "foo");
+
+  // add another tag, to test delimiter and sorting
+  tagssvc.tagURI(bookmarkURI, ["bar"]);
+  Assert.equal(node.tags, "bar,foo");
+
+  // remove the tags, confirming the property is cleared
+  tagssvc.untagURI(bookmarkURI, null);
+  Assert.equal(node.tags, null);
+
+  toolbarNode.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_425563.js b/toolkit/components/places/tests/unit/test_425563.js
new file mode 100644
index 0000000000..8ecf8bbcc8
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_425563.js
@@ -0,0 +1,76 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+add_task(async function test_execute() {
+  let count_visited_URIs = [
+    "http://www.test-link.com/",
+    "http://www.test-typed.com/",
+    "http://www.test-bookmark.com/",
+    "http://www.test-redirect-permanent.com/",
+    "http://www.test-redirect-temporary.com/",
+  ];
+
+  let notcount_visited_URIs = [
+    "http://www.test-download.com/",
+    "http://www.test-framed.com/",
+    "http://www.test-reload.com/",
+  ];
+
+  // add visits, one for each transition type
+  await PlacesTestUtils.addVisits([
+    { uri: uri("http://www.test-link.com/"), transition: TRANSITION_LINK },
+    { uri: uri("http://www.test-typed.com/"), transition: TRANSITION_TYPED },
+    {
+      uri: uri("http://www.test-bookmark.com/"),
+      transition: TRANSITION_BOOKMARK,
+    },
+    {
+      uri: uri("http://www.test-framed.com/"),
+      transition: TRANSITION_FRAMED_LINK,
+    },
+    {
+      uri: uri("http://www.test-redirect-permanent.com/"),
+      transition: TRANSITION_REDIRECT_PERMANENT,
+    },
+    {
+      uri: uri("http://www.test-redirect-temporary.com/"),
+      transition: TRANSITION_REDIRECT_TEMPORARY,
+    },
+    {
+      uri: uri("http://www.test-download.com/"),
+      transition: TRANSITION_DOWNLOAD,
+    },
+    { uri: uri("http://www.test-reload.com/"), transition: TRANSITION_RELOAD },
+  ]);
+
+  // check that all links are marked as visited
+  for (let visited_uri of count_visited_URIs) {
+    Assert.ok(await PlacesUtils.history.hasVisits(uri(visited_uri)));
+  }
+  for (let visited_uri of notcount_visited_URIs) {
+    Assert.ok(await PlacesUtils.history.hasVisits(uri(visited_uri)));
+  }
+
+  // check that visit_count does not take in count embed and downloads
+  // maxVisits query are directly binded to visit_count
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_VISITCOUNT_DESCENDING;
+  options.resultType = options.RESULTS_AS_VISIT;
+  options.includeHidden = true;
+  let query = PlacesUtils.history.getNewQuery();
+  query.minVisits = 1;
+  let root = PlacesUtils.history.executeQuery(query, options).root;
+
+  root.containerOpen = true;
+  let cc = root.childCount;
+  Assert.equal(cc, count_visited_URIs.length);
+
+  for (let i = 0; i < cc; i++) {
+    let node = root.getChild(i);
+    Assert.notEqual(count_visited_URIs.indexOf(node.uri), -1);
+  }
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_429505_remove_shortcuts.js b/toolkit/components/places/tests/unit/test_429505_remove_shortcuts.js
new file mode 100644
index 0000000000..d5926d0c17
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_429505_remove_shortcuts.js
@@ -0,0 +1,45 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+
+- add a folder
+- add a folder-shortcut to the new folder
+- query for the shortcut
+- remove the folder-shortcut
+- confirm the shortcut is removed from the query results
+
+*/
+
+add_task(async function test_query_with_remove_shortcut() {
+  let folder = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "",
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+  });
+
+  let query = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "",
+    url: `place:parent=${folder.guid}`,
+  });
+
+  var root = PlacesUtils.getFolderContents(
+    PlacesUtils.bookmarks.toolbarGuid,
+    false,
+    true
+  ).root;
+
+  var oldCount = root.childCount;
+
+  await PlacesUtils.bookmarks.remove(query.guid);
+
+  Assert.equal(root.childCount, oldCount - 1);
+
+  root.containerOpen = false;
+
+  await PlacesTestUtils.promiseAsyncUpdates();
+});
diff --git a/toolkit/components/places/tests/unit/test_433317_query_title_update.js b/toolkit/components/places/tests/unit/test_433317_query_title_update.js
new file mode 100644
index 0000000000..d8f69064d9
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_433317_query_title_update.js
@@ -0,0 +1,43 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+add_task(async function test_query_title_update() {
+  try {
+    var histsvc = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+      Ci.nsINavHistoryService
+    );
+  } catch (ex) {
+    do_throw("Unable to initialize Places services");
+  }
+
+  // create a query bookmark
+  let bmQuery = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "test query",
+    url: "place:",
+  });
+
+  // query for that query
+  var options = histsvc.getNewQueryOptions();
+  let query = histsvc.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.toolbarGuid]);
+  var result = histsvc.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  var queryNode = root.getChild(0);
+  Assert.equal(queryNode.title, "test query");
+
+  // change the title
+  await PlacesUtils.bookmarks.update({
+    guid: bmQuery.guid,
+    title: "foo",
+  });
+
+  // confirm the node was updated
+  Assert.equal(queryNode.title, "foo");
+
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_433525_hasChildren_crash.js b/toolkit/components/places/tests/unit/test_433525_hasChildren_crash.js
new file mode 100644
index 0000000000..231722e72b
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_433525_hasChildren_crash.js
@@ -0,0 +1,52 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+add_task(async function test_execute() {
+  try {
+    var histsvc = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+      Ci.nsINavHistoryService
+    );
+  } catch (ex) {
+    do_throw("Unable to initialize Places services");
+  }
+
+  // add a visit
+  var testURI = uri("http://test");
+  await PlacesTestUtils.addVisits(testURI);
+
+  // query for the visit
+  var options = histsvc.getNewQueryOptions();
+  options.maxResults = 1;
+  options.resultType = options.RESULTS_AS_URI;
+  var query = histsvc.getNewQuery();
+  query.uri = testURI;
+  var result = histsvc.executeQuery(query, options);
+  var root = result.root;
+
+  // check hasChildren while the container is closed
+  Assert.equal(root.hasChildren, true);
+
+  // now check via the saved search path
+  var queryURI = histsvc.queryToQueryString(query, options);
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "test query",
+    url: queryURI,
+  });
+
+  // query for that query
+  options = histsvc.getNewQueryOptions();
+  query = histsvc.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.toolbarGuid]);
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  var queryNode = root.getChild(0);
+  Assert.equal(queryNode.title, "test query");
+  queryNode.QueryInterface(Ci.nsINavHistoryContainerResultNode);
+  Assert.equal(queryNode.hasChildren, true);
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_454977.js b/toolkit/components/places/tests/unit/test_454977.js
new file mode 100644
index 0000000000..aa6437988f
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_454977.js
@@ -0,0 +1,121 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Cache actual visit_count value, filled by add_visit, used by check_results
+var visit_count = 0;
+
+// Returns the Place ID corresponding to an added visit.
+async function task_add_visit(aURI, aVisitType) {
+  // Wait for a visits notification and get the visitId.
+  let visitId;
+  let visitsPromise = PlacesTestUtils.waitForNotification(
+    "page-visited",
+    visits => {
+      visitId = visits[0].visitId;
+      let { url } = visits[0];
+      return url == aURI.spec;
+    }
+  );
+
+  // Add visits.
+  await PlacesTestUtils.addVisits([
+    {
+      uri: aURI,
+      transition: aVisitType,
+    },
+  ]);
+
+  if (aVisitType != TRANSITION_EMBED) {
+    await visitsPromise;
+  }
+
+  // Increase visit_count if applicable
+  if (
+    aVisitType != 0 &&
+    aVisitType != TRANSITION_EMBED &&
+    aVisitType != TRANSITION_FRAMED_LINK &&
+    aVisitType != TRANSITION_DOWNLOAD &&
+    aVisitType != TRANSITION_RELOAD
+  ) {
+    visit_count++;
+  }
+
+  // Get the place id
+  if (visitId > 0) {
+    let sql = "SELECT place_id FROM moz_historyvisits WHERE id = ?1";
+    let stmt = DBConn().createStatement(sql);
+    stmt.bindByIndex(0, visitId);
+    Assert.ok(stmt.executeStep());
+    let placeId = stmt.getInt64(0);
+    stmt.finalize();
+    Assert.ok(placeId > 0);
+    return placeId;
+  }
+  return 0;
+}
+
+/**
+ * Checks for results consistency, using visit_count as constraint
+ * @param   aExpectedCount
+ *          Number of history results we are expecting (excluded hidden ones)
+ * @param   aExpectedCountWithHidden
+ *          Number of history results we are expecting (included hidden ones)
+ */
+function check_results(aExpectedCount, aExpectedCountWithHidden) {
+  let query = PlacesUtils.history.getNewQuery();
+  // used to check visit_count
+  query.minVisits = visit_count;
+  query.maxVisits = visit_count;
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.queryType = Ci.nsINavHistoryQueryOptions.QUERY_TYPE_HISTORY;
+  let root = PlacesUtils.history.executeQuery(query, options).root;
+  root.containerOpen = true;
+  // Children without hidden ones
+  Assert.equal(root.childCount, aExpectedCount);
+  root.containerOpen = false;
+
+  // Execute again with includeHidden = true
+  // This will ensure visit_count is correct
+  options.includeHidden = true;
+  root = PlacesUtils.history.executeQuery(query, options).root;
+  root.containerOpen = true;
+  // Children with hidden ones
+  Assert.equal(root.childCount, aExpectedCountWithHidden);
+  root.containerOpen = false;
+}
+
+// main
+
+add_task(async function test_execute() {
+  const TEST_URI = uri("http://test.mozilla.org/");
+
+  // Add a visit that force hidden
+  await task_add_visit(TEST_URI, TRANSITION_EMBED);
+  check_results(0, 0);
+
+  let placeId = await task_add_visit(TEST_URI, TRANSITION_FRAMED_LINK);
+  check_results(0, 1);
+
+  // Add a visit that force unhide and check the place id.
+  // - We expect that the place gets hidden = 0 while retaining the same
+  //   place id and a correct visit_count.
+  Assert.equal(await task_add_visit(TEST_URI, TRANSITION_TYPED), placeId);
+  check_results(1, 1);
+
+  // Add a visit that should not increase visit_count
+  Assert.equal(await task_add_visit(TEST_URI, TRANSITION_RELOAD), placeId);
+  check_results(1, 1);
+
+  // Add a visit that should not increase visit_count
+  Assert.equal(await task_add_visit(TEST_URI, TRANSITION_DOWNLOAD), placeId);
+  check_results(1, 1);
+
+  // Add a visit, check that hidden is not overwritten
+  // - We expect that the place has still hidden = 0, while retaining
+  //   correct visit_count.
+  await task_add_visit(TEST_URI, TRANSITION_EMBED);
+  check_results(1, 1);
+});
diff --git a/toolkit/components/places/tests/unit/test_463863.js b/toolkit/components/places/tests/unit/test_463863.js
new file mode 100644
index 0000000000..d524c00cd3
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_463863.js
@@ -0,0 +1,56 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * TEST DESCRIPTION:
+ *
+ * This test checks that in a basic history query all transition types visits
+ * appear but TRANSITION_EMBED and TRANSITION_FRAMED_LINK ones.
+ */
+
+var transitions = [
+  TRANSITION_LINK,
+  TRANSITION_TYPED,
+  TRANSITION_BOOKMARK,
+  TRANSITION_EMBED,
+  TRANSITION_FRAMED_LINK,
+  TRANSITION_REDIRECT_PERMANENT,
+  TRANSITION_REDIRECT_TEMPORARY,
+  TRANSITION_DOWNLOAD,
+];
+
+function runQuery(aResultType) {
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.resultType = aResultType;
+  let root = PlacesUtils.history.executeQuery(
+    PlacesUtils.history.getNewQuery(),
+    options
+  ).root;
+  root.containerOpen = true;
+  let cc = root.childCount;
+  Assert.equal(cc, transitions.length - 2);
+
+  for (let i = 0; i < cc; i++) {
+    let node = root.getChild(i);
+    // Check that all transition types but EMBED and FRAMED appear in results
+    Assert.notEqual(node.uri.substr(6, 1), TRANSITION_EMBED);
+    Assert.notEqual(node.uri.substr(6, 1), TRANSITION_FRAMED_LINK);
+  }
+  root.containerOpen = false;
+}
+
+add_task(async function test_execute() {
+  // add visits, one for each transition type
+  for (let transition of transitions) {
+    await PlacesTestUtils.addVisits({
+      uri: uri("http://" + transition + ".mozilla.org/"),
+      transition,
+    });
+  }
+
+  runQuery(Ci.nsINavHistoryQueryOptions.RESULTS_AS_VISIT);
+  runQuery(Ci.nsINavHistoryQueryOptions.RESULTS_AS_URI);
+});
diff --git a/toolkit/components/places/tests/unit/test_485442_crash_bug_nsNavHistoryQuery_GetUri.js b/toolkit/components/places/tests/unit/test_485442_crash_bug_nsNavHistoryQuery_GetUri.js
new file mode 100644
index 0000000000..73bb5e9af4
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_485442_crash_bug_nsNavHistoryQuery_GetUri.js
@@ -0,0 +1,19 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function run_test() {
+  let query = PlacesUtils.history.getNewQuery();
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.resultType = options.RESULT_TYPE_QUERY;
+  let root = PlacesUtils.history.executeQuery(query, options).root;
+  root.containerOpen = true;
+  Assert.equal(
+    PlacesUtils.asQuery(root).query.uri,
+    null,
+    "Should be null and not crash the browser"
+  );
+  root.containerOpen = false;
+}
diff --git a/toolkit/components/places/tests/unit/test_486978_sort_by_date_queries.js b/toolkit/components/places/tests/unit/test_486978_sort_by_date_queries.js
new file mode 100644
index 0000000000..221377e184
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_486978_sort_by_date_queries.js
@@ -0,0 +1,130 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * TEST DESCRIPTION:
+ *
+ * This test checks that setting a sort on a RESULTS_AS_DATE_QUERY query,
+ * children of inside containers are sorted accordingly.
+ */
+
+var hs = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+  Ci.nsINavHistoryService
+);
+
+// Will be inserted in this order, so last one will be the newest visit.
+var pages = [
+  "http://a.mozilla.org/1/",
+  "http://a.mozilla.org/2/",
+  "http://a.mozilla.org/3/",
+  "http://a.mozilla.org/4/",
+  "http://b.mozilla.org/5/",
+  "http://b.mozilla.org/6/",
+  "http://b.mozilla.org/7/",
+  "http://b.mozilla.org/8/",
+];
+
+add_task(async function test_initialize() {
+  // Add visits.
+  let now = new Date();
+  for (let pageIndex = 0; pageIndex < pages.length; ++pageIndex) {
+    let page = pages[pageIndex];
+    await PlacesTestUtils.addVisits({
+      uri: uri(page),
+      visitDate: new Date(now - (pages.length - pageIndex)),
+    });
+  }
+});
+
+/**
+ * Tests that sorting date query by none will sort by title asc.
+ */
+add_task(function () {
+  var options = hs.getNewQueryOptions();
+  options.resultType = options.RESULTS_AS_DATE_QUERY;
+  // This should sort by title asc.
+  options.sortingMode = options.SORT_BY_NONE;
+  var query = hs.getNewQuery();
+  var result = hs.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  var dayContainer = root
+    .getChild(0)
+    .QueryInterface(Ci.nsINavHistoryContainerResultNode);
+  dayContainer.containerOpen = true;
+
+  var cc = dayContainer.childCount;
+  Assert.equal(cc, pages.length);
+  for (var i = 0; i < cc; i++) {
+    var node = dayContainer.getChild(i);
+    Assert.equal(pages[i], node.uri);
+  }
+
+  dayContainer.containerOpen = false;
+  root.containerOpen = false;
+});
+
+/**
+ * Tests that sorting date query by date will sort accordingly.
+ */
+add_task(function () {
+  var options = hs.getNewQueryOptions();
+  options.resultType = options.RESULTS_AS_DATE_QUERY;
+  // This should sort by title asc.
+  options.sortingMode = options.SORT_BY_DATE_DESCENDING;
+  var query = hs.getNewQuery();
+  var result = hs.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  var dayContainer = root
+    .getChild(0)
+    .QueryInterface(Ci.nsINavHistoryContainerResultNode);
+  dayContainer.containerOpen = true;
+
+  var cc = dayContainer.childCount;
+  Assert.equal(cc, pages.length);
+  for (var i = 0; i < cc; i++) {
+    var node = dayContainer.getChild(i);
+    Assert.equal(pages[pages.length - i - 1], node.uri);
+  }
+
+  dayContainer.containerOpen = false;
+  root.containerOpen = false;
+});
+
+/**
+ * Tests that sorting date site query by date will still sort by title asc.
+ */
+add_task(function () {
+  var options = hs.getNewQueryOptions();
+  options.resultType = options.RESULTS_AS_DATE_SITE_QUERY;
+  // This should sort by title asc.
+  options.sortingMode = options.SORT_BY_DATE_DESCENDING;
+  var query = hs.getNewQuery();
+  var result = hs.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  var dayContainer = root
+    .getChild(0)
+    .QueryInterface(Ci.nsINavHistoryContainerResultNode);
+  dayContainer.containerOpen = true;
+  var siteContainer = dayContainer
+    .getChild(0)
+    .QueryInterface(Ci.nsINavHistoryContainerResultNode);
+  Assert.equal(siteContainer.title, "a.mozilla.org");
+  siteContainer.containerOpen = true;
+
+  var cc = siteContainer.childCount;
+  Assert.equal(cc, pages.length / 2);
+  for (var i = 0; i < cc / 2; i++) {
+    var node = siteContainer.getChild(i);
+    Assert.equal(pages[i], node.uri);
+  }
+
+  siteContainer.containerOpen = false;
+  dayContainer.containerOpen = false;
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_536081.js b/toolkit/components/places/tests/unit/test_536081.js
new file mode 100644
index 0000000000..4105b09d1b
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_536081.js
@@ -0,0 +1,35 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const TEST_URL = {
+  u: "http://www.google.com/search?q=testing%3Bthis&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:unofficial&client=firefox-a",
+  s: "goog",
+};
+
+add_task(async function () {
+  print("Testing url: " + TEST_URL.u);
+  await PlacesTestUtils.addVisits(uri(TEST_URL.u));
+
+  let query = PlacesUtils.history.getNewQuery();
+  query.searchTerms = TEST_URL.s;
+  let options = PlacesUtils.history.getNewQueryOptions();
+
+  let root = PlacesUtils.history.executeQuery(query, options).root;
+  root.containerOpen = true;
+  let cc = root.childCount;
+  Assert.equal(cc, 1);
+
+  print("Checking url is in the query.");
+  let node = root.getChild(0);
+  print("Found " + node.uri);
+
+  Assert.ok(await PlacesTestUtils.isPageInDB(TEST_URL.u));
+
+  root.containerOpen = false;
+  await PlacesUtils.history.remove(node.uri);
+
+  Assert.equal(false, await PlacesTestUtils.isPageInDB(TEST_URL.u));
+});
diff --git a/toolkit/components/places/tests/unit/test_PlacesDBUtils_removeOldCorruptDBs.js b/toolkit/components/places/tests/unit/test_PlacesDBUtils_removeOldCorruptDBs.js
new file mode 100644
index 0000000000..26ec85ffc4
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_PlacesDBUtils_removeOldCorruptDBs.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const TEMP_FILES_TO_CREATE = 5;
+const LAST_MODIFICATION_DAY = [5, 10, 15, 20, 25];
+const TEST_CURRENT_TIME = Date.now();
+const MS_PER_DAY = 86400000;
+const RETAIN_DAYS = 14;
+
+async function createfiles() {
+  for (let i = 0; i < TEMP_FILES_TO_CREATE; i++) {
+    let setTime = TEST_CURRENT_TIME;
+    setTime -= LAST_MODIFICATION_DAY[i] * MS_PER_DAY;
+    let fileName = "places.sqlite" + (i > 0 ? "-" + i : "") + ".corrupt";
+    let filePath = PathUtils.join(PathUtils.profileDir, fileName);
+    await IOUtils.writeUTF8(filePath, "test-file-delete-me", {
+      tmpPath: filePath + ".tmp",
+    });
+    Assert.ok(await IOUtils.exists(filePath), "file created: " + filePath);
+    await IOUtils.setModificationTime(filePath, setTime);
+  }
+}
+
+add_task(async function removefiles() {
+  await createfiles();
+  await PlacesDBUtils.runTasks([PlacesDBUtils.removeOldCorruptDBs]);
+  for (let i = 0; i < TEMP_FILES_TO_CREATE; i++) {
+    let fileName = "places.sqlite" + (i > 0 ? "-" + i : "") + ".corrupt";
+    let filePath = PathUtils.join(PathUtils.profileDir, fileName);
+    if (LAST_MODIFICATION_DAY[i] >= RETAIN_DAYS) {
+      Assert.ok(
+        !(await IOUtils.exists(filePath)),
+        "Old corrupt file has been removed" + filePath
+      );
+    } else {
+      Assert.ok(
+        await IOUtils.exists(filePath),
+        "Files that are not old are not removed" + filePath
+      );
+    }
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_PlacesQuery_history.js b/toolkit/components/places/tests/unit/test_PlacesQuery_history.js
new file mode 100644
index 0000000000..9546e03730
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_PlacesQuery_history.js
@@ -0,0 +1,245 @@
+/* Any copyright is dedicated to the Public Domain.
+http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { PlacesQuery } = ChromeUtils.importESModule(
+  "resource://gre/modules/PlacesQuery.sys.mjs"
+);
+
+const placesQuery = new PlacesQuery();
+
+registerCleanupFunction(() => placesQuery.close());
+
+async function waitForUpdateHistoryTask(updateTask) {
+  const promise = new Promise(resolve =>
+    placesQuery.observeHistory(newHistory => resolve(newHistory))
+  );
+  await updateTask();
+  return promise;
+}
+
+add_task(async function test_visits_cache_is_updated() {
+  const now = new Date();
+  info("Insert the first visit.");
+  await PlacesUtils.history.insert({
+    url: "https://www.example.com/",
+    title: "Example Domain",
+    visits: [{ date: now }],
+  });
+  let history = await placesQuery.getHistory();
+  const mapKey = placesQuery.getStartOfDayTimestamp(now);
+  history = history.get(mapKey);
+  Assert.equal(history.length, 1);
+  Assert.equal(history[0].url, "https://www.example.com/");
+  Assert.equal(history[0].date.getTime(), now.getTime());
+  Assert.equal(history[0].title, "Example Domain");
+
+  info("Insert the next visit.");
+  history = await waitForUpdateHistoryTask(() =>
+    PlacesUtils.history.insert({
+      url: "https://example.net/",
+      visits: [{ date: now }],
+    })
+  );
+  history = history.get(mapKey);
+  Assert.equal(history.length, 2);
+  Assert.equal(
+    history[0].url,
+    "https://example.net/",
+    "The most recent visit should come first."
+  );
+  Assert.equal(history[0].date.getTime(), now.getTime());
+
+  info("Remove the first visit.");
+  history = await waitForUpdateHistoryTask(() =>
+    PlacesUtils.history.remove("https://www.example.com/")
+  );
+  history = history.get(mapKey);
+  Assert.equal(history.length, 1);
+  Assert.equal(history[0].url, "https://example.net/");
+
+  info("Remove all visits.");
+  history = await waitForUpdateHistoryTask(() => PlacesUtils.history.clear());
+  Assert.equal(history.size, 0);
+});
+
+add_task(async function test_filter_visits_by_age() {
+  const now = new Date();
+  await PlacesUtils.history.insertMany([
+    {
+      url: "https://www.example.com/",
+      visits: [{ date: new Date("2000-01-01T12:00:00") }],
+    },
+    {
+      url: "https://example.net/",
+      visits: [{ date: now }],
+    },
+  ]);
+  let history = await placesQuery.getHistory({ daysOld: 1 });
+  Assert.equal(history.size, 1, "The older visit should be excluded.");
+  Assert.equal(
+    history.get(placesQuery.getStartOfDayTimestamp(now))[0].url,
+    "https://example.net/"
+  );
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function test_visits_sort_option() {
+  const now = new Date();
+  info("Get history sorted by site.");
+  await PlacesUtils.history.insertMany([
+    { url: "https://www.reddit.com/", visits: [{ date: now }] },
+    { url: "https://twitter.com/", visits: [{ date: now }] },
+  ]);
+  let history = await placesQuery.getHistory({ sortBy: "site" });
+  ["reddit.com", "twitter.com"].forEach(domain =>
+    Assert.ok(history.has(domain))
+  );
+
+  info("Insert the next visit.");
+  history = await waitForUpdateHistoryTask(() =>
+    PlacesUtils.history.insert({
+      url: "https://www.wikipedia.org/",
+      visits: [{ date: now }],
+    })
+  );
+  ["reddit.com", "twitter.com", "wikipedia.org"].forEach(domain =>
+    Assert.ok(history.has(domain))
+  );
+
+  info("Update the sort order.");
+  history = await placesQuery.getHistory({ sortBy: "date" });
+  const mapKey = placesQuery.getStartOfDayTimestamp(now);
+  Assert.equal(history.get(mapKey).length, 3);
+
+  info("Insert the next visit.");
+  history = await waitForUpdateHistoryTask(() =>
+    PlacesUtils.history.insert({
+      url: "https://www.youtube.com/",
+      visits: [{ date: now }],
+    })
+  );
+  Assert.equal(history.get(mapKey).length, 4);
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function test_visits_limit_option() {
+  await PlacesUtils.history.insertMany([
+    {
+      url: "https://www.example.com/",
+      visits: [{ date: new Date() }],
+    },
+    {
+      url: "https://example.net/",
+      visits: [{ date: new Date() }],
+    },
+  ]);
+  let history = await placesQuery.getHistory({ limit: 1 });
+  Assert.equal(
+    [...history.values()].reduce((acc, { length }) => acc + length, 0),
+    1,
+    "Number of visits should be limited to 1."
+  );
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function test_dedupe_visits_by_url() {
+  const today = new Date();
+  const yesterday = new Date(
+    today.getFullYear(),
+    today.getMonth(),
+    today.getDate() - 1
+  );
+  await PlacesUtils.history.insertMany([
+    {
+      url: "https://www.example.com/",
+      visits: [{ date: yesterday }],
+    },
+    {
+      url: "https://www.example.com/",
+      visits: [{ date: today }],
+    },
+    {
+      url: "https://www.example.com/",
+      visits: [{ date: today }],
+    },
+  ]);
+  info("Get history sorted by date.");
+  let history = await placesQuery.getHistory({ sortBy: "date" });
+  Assert.equal(
+    history.get(placesQuery.getStartOfDayTimestamp(yesterday)).length,
+    1,
+    "There was only one visit from yesterday."
+  );
+  Assert.equal(
+    history.get(placesQuery.getStartOfDayTimestamp(today)).length,
+    1,
+    "The duplicate visit from today should be removed."
+  );
+  history = await waitForUpdateHistoryTask(() =>
+    PlacesUtils.history.insert({
+      url: "https://www.example.com/",
+      visits: [{ date: today }],
+    })
+  );
+  Assert.equal(
+    history.get(placesQuery.getStartOfDayTimestamp(today)).length,
+    1,
+    "Visits inserted from `page-visited` events should be deduped."
+  );
+
+  info("Get history sorted by site.");
+  history = await placesQuery.getHistory({ sortBy: "site" });
+  Assert.equal(
+    history.get("example.com").length,
+    1,
+    "The duplicate visits for this site should be removed."
+  );
+  history = await waitForUpdateHistoryTask(() =>
+    PlacesUtils.history.insert({
+      url: "https://www.example.com/",
+      visits: [{ date: yesterday }],
+    })
+  );
+  const visits = history.get("example.com");
+  Assert.equal(
+    visits.length,
+    1,
+    "Visits inserted from `page-visited` events should be deduped."
+  );
+  Assert.equal(
+    visits[0].date.getTime(),
+    today.getTime(),
+    "Deduping keeps the most recent visit."
+  );
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function test_search_visits() {
+  const now = new Date();
+  await PlacesUtils.history.insertMany([
+    {
+      url: "https://www.example.com/",
+      title: "First Visit",
+      visits: [{ date: now }],
+    },
+    {
+      url: "https://example.net/",
+      title: "Second Visit",
+      visits: [{ date: now }],
+    },
+  ]);
+
+  let results = await placesQuery.searchHistory("Visit");
+  Assert.equal(results.length, 2, "Both visits match the search query.");
+
+  results = await placesQuery.searchHistory("First Visit");
+  Assert.equal(results.length, 1, "One visit matches the search query.");
+
+  results = await placesQuery.searchHistory("Bogus");
+  Assert.equal(results.length, 0, "Neither visit matches the search query.");
+
+  await PlacesUtils.history.clear();
+});
diff --git a/toolkit/components/places/tests/unit/test_PlacesUtils_isRootItem.js b/toolkit/components/places/tests/unit/test_PlacesUtils_isRootItem.js
new file mode 100644
index 0000000000..f626d437e0
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_PlacesUtils_isRootItem.js
@@ -0,0 +1,21 @@
+"use strict";
+
+const GUIDS = [
+  PlacesUtils.bookmarks.rootGuid,
+  ...PlacesUtils.bookmarks.userContentRoots,
+  PlacesUtils.bookmarks.tagsGuid,
+];
+
+add_task(async function test_isRootItem() {
+  for (let guid of GUIDS) {
+    Assert.ok(
+      PlacesUtils.isRootItem(guid),
+      `Should correctly identify root item ${guid}`
+    );
+  }
+
+  Assert.ok(
+    !PlacesUtils.isRootItem("fakeguid1234"),
+    "Should not identify other items as root."
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_PlacesUtils_unwrapNodes_place.js b/toolkit/components/places/tests/unit/test_PlacesUtils_unwrapNodes_place.js
new file mode 100644
index 0000000000..8944dc22f4
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_PlacesUtils_unwrapNodes_place.js
@@ -0,0 +1,34 @@
+/* Any copyright is dedicated to the Public Domain.
+ * https://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that unwrapNodes properly filters out place: uris from text flavors.
+
+add_task(function () {
+  let tests = [
+    // Single url.
+    ["place:type=0&sort=1:", PlacesUtils.TYPE_X_MOZ_URL],
+    // Multiple urls.
+    [
+      "place:type=0&sort=1:\nfirst\nplace:type=0&sort=1\nsecond",
+      PlacesUtils.TYPE_X_MOZ_URL,
+    ],
+    // Url == title.
+    ["place:type=0&sort=1:\nplace:type=0&sort=1", PlacesUtils.TYPE_X_MOZ_URL],
+    // Malformed.
+    [
+      "place:type=0&sort=1:\nplace:type=0&sort=1\nmalformed",
+      PlacesUtils.TYPE_X_MOZ_URL,
+    ],
+    // Single url.
+    ["place:type=0&sort=1:", PlacesUtils.TYPE_PLAINTEXT],
+    // Multiple urls.
+    ["place:type=0&sort=1:\nplace:type=0&sort=1", PlacesUtils.TYPE_PLAINTEXT],
+  ];
+  for (let [blob, type] of tests) {
+    Assert.deepEqual(
+      PlacesUtils.unwrapNodes(blob, type),
+      [],
+      "No valid entries should be found"
+    );
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_asyncExecuteLegacyQueries.js b/toolkit/components/places/tests/unit/test_asyncExecuteLegacyQueries.js
new file mode 100644
index 0000000000..084415fb37
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_asyncExecuteLegacyQueries.js
@@ -0,0 +1,84 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// This is a test for asyncExecuteLegacyQuery API.
+
+add_task(async function test_history_query() {
+  let uri = "http://test.visit.mozilla.com/";
+  let title = "Test visit";
+  await PlacesTestUtils.addVisits({ uri, title });
+
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = Ci.nsINavHistoryQueryOptions.SORT_BY_DATE_DESCENDING;
+  let query = PlacesUtils.history.getNewQuery();
+
+  return new Promise(resolve => {
+    PlacesUtils.history.asyncExecuteLegacyQuery(query, options, {
+      handleResult(aResultSet) {
+        for (let row; (row = aResultSet.getNextRow()); ) {
+          try {
+            Assert.equal(row.getResultByIndex(1), uri);
+            Assert.equal(row.getResultByIndex(2), title);
+          } catch (e) {
+            do_throw("Error while fetching page data.");
+          }
+        }
+      },
+      handleError(aError) {
+        do_throw(
+          "Async execution error (" + aError.result + "): " + aError.message
+        );
+      },
+      handleCompletion(aReason) {
+        cleanupTest().then(resolve);
+      },
+    });
+  });
+});
+
+add_task(async function test_bookmarks_query() {
+  let url = "http://test.bookmark.mozilla.com/";
+  let title = "Test bookmark";
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title,
+    url,
+  });
+
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode =
+    Ci.nsINavHistoryQueryOptions.SORT_BY_LASTMODIFIED_DESCENDING;
+  options.queryType = options.QUERY_TYPE_BOOKMARKS;
+  let query = PlacesUtils.history.getNewQuery();
+
+  return new Promise(resolve => {
+    PlacesUtils.history.asyncExecuteLegacyQuery(query, options, {
+      handleResult(aResultSet) {
+        for (let row; (row = aResultSet.getNextRow()); ) {
+          try {
+            Assert.equal(row.getResultByIndex(1), url);
+            Assert.equal(row.getResultByIndex(2), title);
+          } catch (e) {
+            do_throw("Error while fetching page data.");
+          }
+        }
+      },
+      handleError(aError) {
+        do_throw(
+          "Async execution error (" + aError.result + "): " + aError.message
+        );
+      },
+      handleCompletion(aReason) {
+        cleanupTest().then(resolve);
+      },
+    });
+  });
+});
+
+function cleanupTest() {
+  return Promise.all([
+    PlacesUtils.history.clear(),
+    PlacesUtils.bookmarks.eraseEverything(),
+  ]);
+}
diff --git a/toolkit/components/places/tests/unit/test_async_transactions.js b/toolkit/components/places/tests/unit/test_async_transactions.js
new file mode 100644
index 0000000000..b0e9b292f3
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_async_transactions.js
@@ -0,0 +1,2125 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const bmsvc = PlacesUtils.bookmarks;
+const obsvc = PlacesUtils.observers;
+const tagssvc = PlacesUtils.tagging;
+const PT = PlacesTransactions;
+const menuGuid = PlacesUtils.bookmarks.menuGuid;
+
+ChromeUtils.defineESModuleGetters(this, {
+  Preferences: "resource://gre/modules/Preferences.sys.mjs",
+});
+
+// Create and add bookmarks observer.
+var observer = {
+  tagRelatedGuids: new Set(),
+
+  reset() {
+    this.itemsAdded = new Map();
+    this.itemsRemoved = new Map();
+    this.itemsMoved = new Map();
+    this.itemsKeywordChanged = new Map();
+    this.itemsTitleChanged = new Map();
+    this.itemsUrlChanged = new Map();
+  },
+
+  handlePlacesEvents(events) {
+    for (let event of events) {
+      switch (event.type) {
+        case "bookmark-added":
+          // Ignore tag items.
+          if (event.isTagging) {
+            this.tagRelatedGuids.add(event.guid);
+            return;
+          }
+
+          this.itemsAdded.set(event.guid, {
+            itemId: event.id,
+            parentGuid: event.parentGuid,
+            index: event.index,
+            itemType: event.itemType,
+            title: event.title,
+            url: event.url,
+          });
+          break;
+        case "bookmark-removed":
+          if (this.tagRelatedGuids.has(event.guid)) {
+            return;
+          }
+
+          this.itemsRemoved.set(event.guid, {
+            parentGuid: event.parentGuid,
+            index: event.index,
+            itemType: event.itemType,
+          });
+          break;
+        case "bookmark-moved":
+          this.itemsMoved.set(event.guid, {
+            oldParentGuid: event.oldParentGuid,
+            oldIndex: event.oldIndex,
+            newParentGuid: event.parentGuid,
+            newIndex: event.index,
+            itemType: event.itemType,
+          });
+          break;
+        case "bookmark-keyword-changed":
+          if (this.tagRelatedGuids.has(event.guid)) {
+            return;
+          }
+
+          this.itemsKeywordChanged.set(event.guid, {
+            keyword: event.keyword,
+          });
+          break;
+        case "bookmark-title-changed":
+          if (this.tagRelatedGuids.has(event.guid)) {
+            return;
+          }
+
+          this.itemsTitleChanged.set(event.guid, {
+            title: event.title,
+            parentGuid: event.parentGuid,
+          });
+          break;
+        case "bookmark-url-changed":
+          if (this.tagRelatedGuids.has(event.guid)) {
+            return;
+          }
+
+          this.itemsUrlChanged.set(event.guid, {
+            url: event.url,
+          });
+          break;
+      }
+    }
+  },
+};
+observer.reset();
+
+// index at which items should begin
+var bmStartIndex = 0;
+
+function run_test() {
+  observer.handlePlacesEvents = observer.handlePlacesEvents.bind(observer);
+  obsvc.addListener(
+    [
+      "bookmark-added",
+      "bookmark-removed",
+      "bookmark-moved",
+      "bookmark-keyword-changed",
+      "bookmark-title-changed",
+      "bookmark-url-changed",
+    ],
+    observer.handlePlacesEvents
+  );
+  registerCleanupFunction(function () {
+    obsvc.removeListener(
+      [
+        "bookmark-added",
+        "bookmark-removed",
+        "bookmark-moved",
+        "bookmark-keyword-changed",
+        "bookmark-title-changed",
+        "bookmark-url-changed",
+      ],
+      observer.handlePlacesEvents
+    );
+  });
+
+  run_next_test();
+}
+
+function sanityCheckTransactionHistory() {
+  Assert.ok(PT.undoPosition <= PT.length);
+
+  let check_entry_throws = f => {
+    try {
+      f();
+      do_throw("PT.entry should throw for invalid input");
+    } catch (ex) {}
+  };
+  check_entry_throws(() => PT.entry(-1));
+  check_entry_throws(() => PT.entry({}));
+  check_entry_throws(() => PT.entry(PT.length));
+
+  if (PT.undoPosition < PT.length) {
+    Assert.equal(PT.topUndoEntry, PT.entry(PT.undoPosition));
+  } else {
+    Assert.equal(null, PT.topUndoEntry);
+  }
+  if (PT.undoPosition > 0) {
+    Assert.equal(PT.topRedoEntry, PT.entry(PT.undoPosition - 1));
+  } else {
+    Assert.equal(null, PT.topRedoEntry);
+  }
+}
+
+function getTransactionsHistoryState() {
+  let history = [];
+  for (let i = 0; i < PT.length; i++) {
+    history.push(PT.entry(i));
+  }
+  return [history, PT.undoPosition];
+}
+
+function ensureUndoState(aExpectedEntries = [], aExpectedUndoPosition = 0) {
+  // ensureUndoState is called in various places during this test, so it's
+  // a good places to sanity-check the transaction-history APIs in all
+  // cases.
+  sanityCheckTransactionHistory();
+
+  let [actualEntries, actualUndoPosition] = getTransactionsHistoryState();
+  Assert.equal(actualEntries.length, aExpectedEntries.length);
+  Assert.equal(actualUndoPosition, aExpectedUndoPosition);
+
+  function checkEqualEntries(aExpectedEntry, aActualEntry) {
+    Assert.equal(aExpectedEntry.length, aActualEntry.length);
+    aExpectedEntry.forEach((t, i) => Assert.equal(t, aActualEntry[i]));
+  }
+  aExpectedEntries.forEach((e, i) => checkEqualEntries(e, actualEntries[i]));
+}
+
+function ensureItemsAdded(...items) {
+  let expectedResultsCount = items.length;
+
+  for (let item of items) {
+    if ("children" in item) {
+      expectedResultsCount += item.children.length;
+    }
+    Assert.ok(
+      observer.itemsAdded.has(item.guid),
+      `Should have the expected guid ${item.guid}`
+    );
+    let info = observer.itemsAdded.get(item.guid);
+    Assert.equal(
+      info.parentGuid,
+      item.parentGuid,
+      "Should have notified the correct parentGuid"
+    );
+    for (let propName of ["title", "index", "itemType"]) {
+      if (propName in item) {
+        Assert.equal(info[propName], item[propName]);
+      }
+    }
+    if ("url" in item) {
+      Assert.ok(
+        Services.io.newURI(info.url).equals(Services.io.newURI(item.url)),
+        "Should have the correct url"
+      );
+    }
+  }
+
+  Assert.equal(
+    observer.itemsAdded.size,
+    expectedResultsCount,
+    "Should have added the correct number of items"
+  );
+}
+
+function ensureItemsRemoved(...items) {
+  let expectedResultsCount = items.length;
+
+  for (let item of items) {
+    // We accept both guids and full info object here.
+    if (typeof item == "string") {
+      Assert.ok(
+        observer.itemsRemoved.has(item),
+        `Should have removed the expected guid ${item}`
+      );
+    } else {
+      if ("children" in item) {
+        expectedResultsCount += item.children.length;
+      }
+
+      Assert.ok(
+        observer.itemsRemoved.has(item.guid),
+        `Should have removed expected guid ${item.guid}`
+      );
+      let info = observer.itemsRemoved.get(item.guid);
+      Assert.equal(
+        info.parentGuid,
+        item.parentGuid,
+        "Should have notified the correct parentGuid"
+      );
+      if ("index" in item) {
+        Assert.equal(info.index, item.index);
+      }
+    }
+  }
+
+  Assert.equal(
+    observer.itemsRemoved.size,
+    expectedResultsCount,
+    "Should have removed the correct number of items"
+  );
+}
+
+function ensureItemsMoved(...items) {
+  Assert.equal(
+    observer.itemsMoved.size,
+    items.length,
+    "Should have received the correct number of moved notifications"
+  );
+  for (let item of items) {
+    Assert.ok(
+      observer.itemsMoved.has(item.guid),
+      `Observer should have a move for ${item.guid}`
+    );
+    let info = observer.itemsMoved.get(item.guid);
+    Assert.equal(
+      info.oldParentGuid,
+      item.oldParentGuid,
+      "Should have the correct old parent guid"
+    );
+    Assert.equal(
+      info.oldIndex,
+      item.oldIndex,
+      "Should have the correct old index"
+    );
+    Assert.equal(
+      info.newParentGuid,
+      item.newParentGuid,
+      "Should have the correct new parent guid"
+    );
+    Assert.equal(
+      info.newIndex,
+      item.newIndex,
+      "Should have the correct new index"
+    );
+  }
+}
+
+function ensureItemsKeywordChanged(...items) {
+  for (const item of items) {
+    Assert.ok(
+      observer.itemsKeywordChanged.has(item.guid),
+      `Observer should have a keyword changed for ${item.guid}`
+    );
+    const info = observer.itemsKeywordChanged.get(item.guid);
+    Assert.equal(info.keyword, item.keyword, "Should have the correct keyword");
+  }
+}
+
+function ensureItemsTitleChanged(...items) {
+  Assert.equal(
+    observer.itemsTitleChanged.size,
+    items.length,
+    "Should have received the correct number of bookmark-title-changed notifications"
+  );
+  for (const item of items) {
+    Assert.ok(
+      observer.itemsTitleChanged.has(item.guid),
+      `Observer should have a title changed for ${item.guid}`
+    );
+    const info = observer.itemsTitleChanged.get(item.guid);
+    Assert.equal(info.title, item.title, "Should have the correct title");
+    Assert.equal(
+      info.parentGuid,
+      item.parentGuid,
+      "Should have the correct parent guid"
+    );
+  }
+}
+
+function ensureItemsUrlChanged(...items) {
+  Assert.equal(
+    observer.itemsUrlChanged.size,
+    items.length,
+    "Should have received the correct number of bookmark-url-changed notifications"
+  );
+  for (const item of items) {
+    Assert.ok(
+      observer.itemsUrlChanged.has(item.guid),
+      `Observer should have a title changed for ${item.guid}`
+    );
+    const info = observer.itemsUrlChanged.get(item.guid);
+    Assert.equal(info.url, item.url, "Should have the correct url");
+  }
+}
+
+function ensureTagsForURI(aURI, aTags) {
+  let tagsSet = tagssvc.getTagsForURI(Services.io.newURI(aURI));
+  Assert.equal(tagsSet.length, aTags.length);
+  Assert.ok(aTags.every(t => tagsSet.includes(t)));
+}
+
+function createTestFolderInfo(
+  title = "Test Folder",
+  parentGuid = menuGuid,
+  children = undefined
+) {
+  let info = { parentGuid, title };
+  if (children) {
+    info.children = children;
+  }
+  return info;
+}
+
+function removeAllDatesInTree(tree) {
+  if ("lastModified" in tree) {
+    delete tree.lastModified;
+  }
+  if ("dateAdded" in tree) {
+    delete tree.dateAdded;
+  }
+
+  if (!tree.children) {
+    return;
+  }
+
+  for (let child of tree.children) {
+    removeAllDatesInTree(child);
+  }
+}
+
+// Checks if two bookmark trees (as returned by promiseBookmarksTree) are the
+// same.
+// false value for aCheckParentAndPosition is ignored if aIsRestoredItem is set.
+async function ensureEqualBookmarksTrees(
+  aOriginal,
+  aNew,
+  aIsRestoredItem = true,
+  aCheckParentAndPosition = false,
+  aIgnoreAllDates = false
+) {
+  // Note "id" is not-enumerable, and is therefore skipped by Object.keys (both
+  // ours and the one at deepEqual). This is fine for us because ids are not
+  // restored by Redo.
+  if (aIsRestoredItem) {
+    if (aIgnoreAllDates) {
+      removeAllDatesInTree(aOriginal);
+      removeAllDatesInTree(aNew);
+    } else if (!aOriginal.lastModified) {
+      // Ignore lastModified for newly created items, for performance reasons.
+      aNew.lastModified = aOriginal.lastModified;
+    }
+    Assert.deepEqual(aOriginal, aNew);
+    return;
+  }
+
+  for (let property of Object.keys(aOriginal)) {
+    if (property == "children") {
+      Assert.equal(aOriginal.children.length, aNew.children.length);
+      for (let i = 0; i < aOriginal.children.length; i++) {
+        await ensureEqualBookmarksTrees(
+          aOriginal.children[i],
+          aNew.children[i],
+          false,
+          true,
+          aIgnoreAllDates
+        );
+      }
+    } else if (property == "guid") {
+      // guid shouldn't be copied if the item was not restored.
+      Assert.notEqual(aOriginal.guid, aNew.guid);
+    } else if (property == "dateAdded") {
+      // dateAdded shouldn't be copied if the item was not restored.
+      Assert.ok(is_time_ordered(aOriginal.dateAdded, aNew.dateAdded));
+    } else if (property == "lastModified") {
+      // same same, except for the never-changed case
+      if (!aOriginal.lastModified) {
+        Assert.ok(!aNew.lastModified);
+      } else {
+        Assert.ok(is_time_ordered(aOriginal.lastModified, aNew.lastModified));
+      }
+    } else if (
+      aCheckParentAndPosition ||
+      (property != "parentGuid" && property != "index")
+    ) {
+      Assert.deepEqual(aOriginal[property], aNew[property]);
+    }
+  }
+}
+
+async function ensureBookmarksTreeRestoredCorrectly(
+  ...aOriginalBookmarksTrees
+) {
+  for (let originalTree of aOriginalBookmarksTrees) {
+    let restoredTree = await PlacesUtils.promiseBookmarksTree(
+      originalTree.guid
+    );
+    await ensureEqualBookmarksTrees(originalTree, restoredTree);
+  }
+}
+
+async function ensureBookmarksTreeRestoredCorrectlyExceptDates(
+  ...aOriginalBookmarksTrees
+) {
+  for (let originalTree of aOriginalBookmarksTrees) {
+    let restoredTree = await PlacesUtils.promiseBookmarksTree(
+      originalTree.guid
+    );
+    await ensureEqualBookmarksTrees(
+      originalTree,
+      restoredTree,
+      true,
+      false,
+      true
+    );
+  }
+}
+
+async function ensureNonExistent(...aGuids) {
+  for (let guid of aGuids) {
+    Assert.strictEqual(await PlacesUtils.promiseBookmarksTree(guid), null);
+  }
+}
+
+add_task(async function test_recycled_transactions() {
+  async function ensureTransactThrowsFor(aTransaction) {
+    let [txns, undoPosition] = getTransactionsHistoryState();
+    try {
+      await aTransaction.transact();
+      do_throw("Shouldn't be able to use the same transaction twice");
+    } catch (ex) {}
+    ensureUndoState(txns, undoPosition);
+  }
+
+  let txn_a = PT.NewFolder(createTestFolderInfo());
+  await txn_a.transact();
+  ensureUndoState([[txn_a]], 0);
+  await ensureTransactThrowsFor(txn_a);
+
+  await PT.undo();
+  ensureUndoState([[txn_a]], 1);
+  ensureTransactThrowsFor(txn_a);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+  ensureTransactThrowsFor(txn_a);
+
+  let txn_b = PT.NewFolder(createTestFolderInfo());
+  let results = await PT.batch([
+    txn_a, // Shouldn't be able to use the same transaction twice.
+    txn_b,
+  ]);
+  Assert.strictEqual(
+    results[0],
+    undefined,
+    "First transaction should fail as it can't be reused"
+  );
+  ensureUndoState([[txn_b]], 0);
+
+  await PT.undo();
+  ensureUndoState([[txn_b]], 1);
+  ensureTransactThrowsFor(txn_a);
+  ensureTransactThrowsFor(txn_b);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+  observer.reset();
+});
+
+add_task(async function test_new_folder_with_children() {
+  let folder_info = createTestFolderInfo(
+    "Test folder",
+    PlacesUtils.bookmarks.menuGuid,
+    [
+      {
+        url: "http://test_create_item.com",
+        title: "Test creating an item",
+      },
+    ]
+  );
+  ensureUndoState();
+  let txn = PT.NewFolder(folder_info);
+  folder_info.guid = await txn.transact();
+  let originalInfo = await PlacesUtils.promiseBookmarksTree(folder_info.guid);
+  let ensureDo = async function (aRedo = false) {
+    ensureUndoState([[txn]], 0);
+    ensureItemsAdded(folder_info);
+    if (aRedo) {
+      // Ignore lastModified in the comparison, for performance reasons.
+      originalInfo.lastModified = null;
+      await ensureBookmarksTreeRestoredCorrectlyExceptDates(originalInfo);
+    }
+    observer.reset();
+  };
+
+  let ensureUndo = () => {
+    ensureUndoState([[txn]], 1);
+    ensureItemsRemoved({
+      guid: folder_info.guid,
+      parentGuid: folder_info.parentGuid,
+      index: bmStartIndex,
+      children: [
+        {
+          title: "Test creating an item",
+          url: "http://test_create_item.com",
+        },
+      ],
+    });
+    observer.reset();
+  };
+
+  await ensureDo();
+  await PT.undo();
+  await ensureUndo();
+  await PT.redo();
+  await ensureDo(true);
+  await PT.undo();
+  ensureUndo();
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_new_bookmark() {
+  let bm_info = {
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "http://test_create_item.com",
+    index: bmStartIndex,
+    title: "Test creating an item",
+  };
+
+  ensureUndoState();
+  let txn = PT.NewBookmark(bm_info);
+  bm_info.guid = await txn.transact();
+
+  let originalInfo = await PlacesUtils.promiseBookmarksTree(bm_info.guid);
+  let ensureDo = async function (aRedo = false) {
+    ensureUndoState([[txn]], 0);
+    await ensureItemsAdded(bm_info);
+    if (aRedo) {
+      await ensureBookmarksTreeRestoredCorrectly(originalInfo);
+    }
+    observer.reset();
+  };
+  let ensureUndo = () => {
+    ensureUndoState([[txn]], 1);
+    ensureItemsRemoved({
+      guid: bm_info.guid,
+      parentGuid: bm_info.parentGuid,
+      index: bmStartIndex,
+    });
+    observer.reset();
+  };
+
+  await ensureDo();
+  await PT.undo();
+  ensureUndo();
+  await PT.redo(true);
+  await ensureDo();
+  await PT.undo();
+  ensureUndo();
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_merge_create_folder_and_item() {
+  let folder_info = createTestFolderInfo();
+  let bm_info = {
+    url: "http://test_create_item_to_folder.com",
+    title: "Test Bookmark",
+    index: bmStartIndex,
+  };
+
+  let folderTxn = PT.NewFolder(folder_info);
+  let bmTxn;
+  let results = await PT.batch([
+    folderTxn,
+    previousResults => {
+      bm_info.parentGuid = previousResults[0];
+      return (bmTxn = PT.NewBookmark(bm_info));
+    },
+  ]);
+  folder_info.guid = results[0];
+  bm_info.guid = results[1];
+
+  let ensureDo = async function () {
+    ensureUndoState([[bmTxn, folderTxn]], 0);
+    await ensureItemsAdded(folder_info, bm_info);
+    observer.reset();
+  };
+
+  let ensureUndo = () => {
+    ensureUndoState([[bmTxn, folderTxn]], 1);
+    ensureItemsRemoved(folder_info, bm_info);
+    observer.reset();
+  };
+
+  await ensureDo();
+  await PT.undo();
+  ensureUndo();
+  await PT.redo();
+  await ensureDo();
+  await PT.undo();
+  ensureUndo();
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_move_items_to_folder() {
+  let folder_a_info = createTestFolderInfo("Folder A");
+  let bm_a_info = { url: "http://test_move_items.com", title: "Bookmark A" };
+  let bm_b_info = { url: "http://test_move_items.com", title: "Bookmark B" };
+
+  // Test moving items within the same folder.
+  let folder_a_txn = PT.NewFolder(folder_a_info);
+  let bm_a_txn, bm_b_txn;
+  let results = await PT.batch([
+    folder_a_txn,
+    previousResults => {
+      bm_a_info.parentGuid = previousResults[0];
+      return (bm_a_txn = PT.NewBookmark(bm_a_info));
+    },
+    previousResults => {
+      bm_b_info.parentGuid = previousResults[0];
+      return (bm_b_txn = PT.NewBookmark(bm_b_info));
+    },
+  ]);
+  console.log("results: " + results);
+  folder_a_info.guid = results[0];
+  bm_a_info.guid = results[1];
+  bm_b_info.guid = results[2];
+
+  ensureUndoState([[bm_b_txn, bm_a_txn, folder_a_txn]], 0);
+
+  let moveTxn = PT.Move({
+    guid: bm_a_info.guid,
+    newParentGuid: folder_a_info.guid,
+  });
+  await moveTxn.transact();
+
+  let ensureDo = () => {
+    ensureUndoState([[moveTxn], [bm_b_txn, bm_a_txn, folder_a_txn]], 0);
+    ensureItemsMoved({
+      guid: bm_a_info.guid,
+      oldParentGuid: folder_a_info.guid,
+      newParentGuid: folder_a_info.guid,
+      oldIndex: 0,
+      newIndex: 1,
+    });
+    observer.reset();
+  };
+  let ensureUndo = () => {
+    ensureUndoState([[moveTxn], [bm_b_txn, bm_a_txn, folder_a_txn]], 1);
+    ensureItemsMoved({
+      guid: bm_a_info.guid,
+      oldParentGuid: folder_a_info.guid,
+      newParentGuid: folder_a_info.guid,
+      oldIndex: 1,
+      newIndex: 0,
+    });
+    observer.reset();
+  };
+
+  ensureDo();
+  await PT.undo();
+  ensureUndo();
+  await PT.redo();
+  ensureDo();
+  await PT.undo();
+  ensureUndo();
+
+  await PT.clearTransactionsHistory(false, true);
+  ensureUndoState([[bm_b_txn, bm_a_txn, folder_a_txn]], 0);
+
+  // Test moving items between folders.
+  let folder_b_info = createTestFolderInfo("Folder B");
+  let folder_b_txn = PT.NewFolder(folder_b_info);
+  folder_b_info.guid = await folder_b_txn.transact();
+  ensureUndoState([[folder_b_txn], [bm_b_txn, bm_a_txn, folder_a_txn]], 0);
+
+  moveTxn = PT.Move({
+    guid: bm_a_info.guid,
+    newParentGuid: folder_b_info.guid,
+    newIndex: bmsvc.DEFAULT_INDEX,
+  });
+  await moveTxn.transact();
+
+  ensureDo = () => {
+    ensureUndoState(
+      [[moveTxn], [folder_b_txn], [bm_b_txn, bm_a_txn, folder_a_txn]],
+      0
+    );
+    ensureItemsMoved({
+      guid: bm_a_info.guid,
+      oldParentGuid: folder_a_info.guid,
+      newParentGuid: folder_b_info.guid,
+      oldIndex: 0,
+      newIndex: 0,
+    });
+    observer.reset();
+  };
+  ensureUndo = () => {
+    ensureUndoState(
+      [[moveTxn], [folder_b_txn], [bm_b_txn, bm_a_txn, folder_a_txn]],
+      1
+    );
+    ensureItemsMoved({
+      guid: bm_a_info.guid,
+      oldParentGuid: folder_b_info.guid,
+      newParentGuid: folder_a_info.guid,
+      oldIndex: 0,
+      newIndex: 0,
+    });
+    observer.reset();
+  };
+
+  ensureDo();
+  await PT.undo();
+  ensureUndo();
+  await PT.redo();
+  ensureDo();
+  await PT.undo();
+  ensureUndo();
+
+  // Clean up
+  await PT.undo(); // folder_b_txn
+  await PT.undo(); // folder_a_txn + the bookmarks;
+  Assert.equal(observer.itemsRemoved.size, 4);
+  ensureUndoState(
+    [[moveTxn], [folder_b_txn], [bm_b_txn, bm_a_txn, folder_a_txn]],
+    3
+  );
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_move_multiple_items_to_folder() {
+  let folder_a_info = createTestFolderInfo("Folder A");
+  let bm_a_info = { url: "http://test_move_items.com", title: "Bookmark A" };
+  let bm_b_info = { url: "http://test_move_items.com", title: "Bookmark B" };
+  let bm_c_info = { url: "http://test_move_items.com", title: "Bookmark C" };
+
+  // Test moving items within the same folder.
+
+  let folder_a_txn = PT.NewFolder(folder_a_info);
+  let bm_a_txn, bm_b_txn, bm_c_txn;
+  let results = await PT.batch([
+    folder_a_txn,
+    previousResults => {
+      bm_a_info.parentGuid = previousResults[0];
+      return (bm_a_txn = PT.NewBookmark(bm_a_info));
+    },
+    previousResults => {
+      bm_b_info.parentGuid = previousResults[0];
+      return (bm_b_txn = PT.NewBookmark(bm_b_info));
+    },
+    previousResults => {
+      bm_c_info.parentGuid = previousResults[0];
+      return (bm_c_txn = PT.NewBookmark(bm_c_info));
+    },
+  ]);
+
+  folder_a_info.guid = results[0];
+  bm_a_info.guid = results[1];
+  bm_b_info.guid = results[2];
+  bm_c_info.guid = results[3];
+
+  ensureUndoState([[bm_c_txn, bm_b_txn, bm_a_txn, folder_a_txn]], 0);
+
+  let moveTxn = PT.Move({
+    guids: [bm_a_info.guid, bm_b_info.guid],
+    newParentGuid: folder_a_info.guid,
+  });
+  await moveTxn.transact();
+
+  let ensureDo = () => {
+    ensureUndoState(
+      [[moveTxn], [bm_c_txn, bm_b_txn, bm_a_txn, folder_a_txn]],
+      0
+    );
+    ensureItemsMoved(
+      {
+        guid: bm_a_info.guid,
+        oldParentGuid: folder_a_info.guid,
+        newParentGuid: folder_a_info.guid,
+        oldIndex: 0,
+        newIndex: 2,
+      },
+      {
+        guid: bm_b_info.guid,
+        oldParentGuid: folder_a_info.guid,
+        newParentGuid: folder_a_info.guid,
+        oldIndex: 1,
+        newIndex: 2,
+      }
+    );
+    observer.reset();
+  };
+  let ensureUndo = () => {
+    ensureUndoState(
+      [[moveTxn], [bm_c_txn, bm_b_txn, bm_a_txn, folder_a_txn]],
+      1
+    );
+    ensureItemsMoved(
+      {
+        guid: bm_a_info.guid,
+        oldParentGuid: folder_a_info.guid,
+        newParentGuid: folder_a_info.guid,
+        oldIndex: 1,
+        newIndex: 0,
+      },
+      {
+        guid: bm_b_info.guid,
+        oldParentGuid: folder_a_info.guid,
+        newParentGuid: folder_a_info.guid,
+        oldIndex: 2,
+        newIndex: 1,
+      }
+    );
+    observer.reset();
+  };
+
+  ensureDo();
+  await PT.undo();
+  ensureUndo();
+  await PT.redo();
+  ensureDo();
+  await PT.undo();
+  ensureUndo();
+
+  await PT.clearTransactionsHistory(false, true);
+  ensureUndoState([[bm_c_txn, bm_b_txn, bm_a_txn, folder_a_txn]], 0);
+
+  // Test moving items between folders.
+  let folder_b_info = createTestFolderInfo("Folder B");
+  let folder_b_txn = PT.NewFolder(folder_b_info);
+  folder_b_info.guid = await folder_b_txn.transact();
+  ensureUndoState(
+    [[folder_b_txn], [bm_c_txn, bm_b_txn, bm_a_txn, folder_a_txn]],
+    0
+  );
+
+  moveTxn = PT.Move({
+    guid: bm_a_info.guid,
+    newParentGuid: folder_b_info.guid,
+    newIndex: bmsvc.DEFAULT_INDEX,
+  });
+  await moveTxn.transact();
+
+  ensureDo = () => {
+    ensureUndoState(
+      [[moveTxn], [folder_b_txn], [bm_c_txn, bm_b_txn, bm_a_txn, folder_a_txn]],
+      0
+    );
+    ensureItemsMoved({
+      guid: bm_a_info.guid,
+      oldParentGuid: folder_a_info.guid,
+      newParentGuid: folder_b_info.guid,
+      oldIndex: 0,
+      newIndex: 0,
+    });
+    observer.reset();
+  };
+  ensureUndo = () => {
+    ensureUndoState(
+      [[moveTxn], [folder_b_txn], [bm_c_txn, bm_b_txn, bm_a_txn, folder_a_txn]],
+      1
+    );
+    ensureItemsMoved({
+      guid: bm_a_info.guid,
+      oldParentGuid: folder_b_info.guid,
+      newParentGuid: folder_a_info.guid,
+      oldIndex: 0,
+      newIndex: 0,
+    });
+    observer.reset();
+  };
+
+  ensureDo();
+  await PT.undo();
+  ensureUndo();
+  await PT.redo();
+  ensureDo();
+  await PT.undo();
+  ensureUndo();
+
+  // Clean up
+  await PT.undo(); // folder_b_txn
+  await PT.undo(); // folder_a_txn + the bookmarks;
+  Assert.equal(observer.itemsRemoved.size, 5);
+  ensureUndoState(
+    [[moveTxn], [folder_b_txn], [bm_c_txn, bm_b_txn, bm_a_txn, folder_a_txn]],
+    3
+  );
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_remove_folder() {
+  let folder_level_1_info = createTestFolderInfo("Folder Level 1");
+  let folder_level_2_info = { title: "Folder Level 2" };
+
+  let folder_level_1_txn = PT.NewFolder(folder_level_1_info);
+  let folder_level_2_txn;
+  let results = await PT.batch([
+    folder_level_1_txn,
+    previousResults => {
+      folder_level_2_info.parentGuid = previousResults[0];
+      return (folder_level_2_txn = PT.NewFolder(folder_level_2_info));
+    },
+  ]);
+  folder_level_1_info.guid = results[0];
+  folder_level_2_info.guid = results[1];
+
+  let original_folder_level_1_tree = await PlacesUtils.promiseBookmarksTree(
+    folder_level_1_info.guid
+  );
+  let original_folder_level_2_tree = Object.assign(
+    { parentGuid: original_folder_level_1_tree.guid },
+    original_folder_level_1_tree.children[0]
+  );
+
+  ensureUndoState([[folder_level_2_txn, folder_level_1_txn]]);
+  await ensureItemsAdded(folder_level_1_info, folder_level_2_info);
+  observer.reset();
+
+  let remove_folder_2_txn = PT.Remove(folder_level_2_info);
+  await remove_folder_2_txn.transact();
+
+  ensureUndoState([
+    [remove_folder_2_txn],
+    [folder_level_2_txn, folder_level_1_txn],
+  ]);
+  await ensureItemsRemoved(folder_level_2_info);
+
+  // Undo Remove "Folder Level 2"
+  await PT.undo();
+  ensureUndoState(
+    [[remove_folder_2_txn], [folder_level_2_txn, folder_level_1_txn]],
+    1
+  );
+  await ensureItemsAdded(folder_level_2_info);
+  await ensureBookmarksTreeRestoredCorrectly(original_folder_level_2_tree);
+  observer.reset();
+
+  // Redo Remove "Folder Level 2"
+  await PT.redo();
+  ensureUndoState([
+    [remove_folder_2_txn],
+    [folder_level_2_txn, folder_level_1_txn],
+  ]);
+  await ensureItemsRemoved(folder_level_2_info);
+  observer.reset();
+
+  // Undo it again
+  await PT.undo();
+  ensureUndoState(
+    [[remove_folder_2_txn], [folder_level_2_txn, folder_level_1_txn]],
+    1
+  );
+  await ensureItemsAdded(folder_level_2_info);
+  await ensureBookmarksTreeRestoredCorrectly(original_folder_level_2_tree);
+  observer.reset();
+
+  // Undo the creation of both folders
+  await PT.undo();
+  ensureUndoState(
+    [[remove_folder_2_txn], [folder_level_2_txn, folder_level_1_txn]],
+    2
+  );
+  await ensureItemsRemoved(folder_level_2_info, folder_level_1_info);
+  observer.reset();
+
+  // Redo the creation of both folders
+  await PT.redo();
+  ensureUndoState(
+    [[remove_folder_2_txn], [folder_level_2_txn, folder_level_1_txn]],
+    1
+  );
+  await ensureItemsAdded(folder_level_1_info, folder_level_2_info);
+  await ensureBookmarksTreeRestoredCorrectlyExceptDates(
+    original_folder_level_1_tree
+  );
+  observer.reset();
+
+  // Redo Remove "Folder Level 2"
+  await PT.redo();
+  ensureUndoState([
+    [remove_folder_2_txn],
+    [folder_level_2_txn, folder_level_1_txn],
+  ]);
+  await ensureItemsRemoved(folder_level_2_info);
+  observer.reset();
+
+  // Undo everything one last time
+  await PT.undo();
+  ensureUndoState(
+    [[remove_folder_2_txn], [folder_level_2_txn, folder_level_1_txn]],
+    1
+  );
+  await ensureItemsAdded(folder_level_2_info);
+  observer.reset();
+
+  await PT.undo();
+  ensureUndoState(
+    [[remove_folder_2_txn], [folder_level_2_txn, folder_level_1_txn]],
+    2
+  );
+  await ensureItemsRemoved(folder_level_2_info, folder_level_2_info);
+  observer.reset();
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_add_and_remove_bookmarks_with_additional_info() {
+  const testURI = "http://add.remove.tag";
+  const TAG_1 = "TestTag1";
+  const TAG_2 = "TestTag2";
+
+  let folder_info = createTestFolderInfo();
+  folder_info.guid = await PT.NewFolder(folder_info).transact();
+  let ensureTags = ensureTagsForURI.bind(null, testURI);
+
+  // Check that the NewBookmark transaction preserves tags.
+  observer.reset();
+  let b1_info = { parentGuid: folder_info.guid, url: testURI, tags: [TAG_1] };
+  b1_info.guid = await PT.NewBookmark(b1_info).transact();
+  let b1_originalInfo = await PlacesUtils.promiseBookmarksTree(b1_info.guid);
+  ensureTags([TAG_1]);
+  await PT.undo();
+  ensureTags([]);
+
+  observer.reset();
+  await PT.redo();
+  await ensureBookmarksTreeRestoredCorrectly(b1_originalInfo);
+  ensureTags([TAG_1]);
+
+  // Check if the Remove transaction removes and restores tags of children
+  // correctly.
+  await PT.Remove(folder_info.guid).transact();
+  ensureTags([]);
+
+  observer.reset();
+  await PT.undo();
+  await ensureBookmarksTreeRestoredCorrectly(b1_originalInfo);
+  ensureTags([TAG_1]);
+
+  await PT.redo();
+  ensureTags([]);
+
+  observer.reset();
+  await PT.undo();
+  await ensureBookmarksTreeRestoredCorrectly(b1_originalInfo);
+  ensureTags([TAG_1]);
+
+  // * Check that no-op tagging (the uri is already tagged with TAG_1) is
+  //   also a no-op on undo.
+  observer.reset();
+  let b2_info = {
+    parentGuid: folder_info.guid,
+    url: testURI,
+    tags: [TAG_1, TAG_2],
+  };
+  b2_info.guid = await PT.NewBookmark(b2_info).transact();
+  ensureTags([TAG_1, TAG_2]);
+
+  observer.reset();
+  await PT.undo();
+  await ensureItemsRemoved(b2_info);
+  ensureTags([TAG_1]);
+
+  // Check if Remove correctly restores tags.
+  observer.reset();
+  await PT.redo();
+  ensureTags([TAG_1, TAG_2]);
+
+  // Test Remove for multiple items.
+  observer.reset();
+  await PT.Remove(b1_info.guid).transact();
+  await PT.Remove(b2_info.guid).transact();
+  await PT.Remove(folder_info.guid).transact();
+  await ensureItemsRemoved(b1_info, b2_info, folder_info);
+  ensureTags([]);
+
+  observer.reset();
+  await PT.undo();
+  await ensureItemsAdded(folder_info);
+  ensureTags([]);
+
+  observer.reset();
+  await PT.undo();
+  ensureTags([TAG_1, TAG_2]);
+
+  observer.reset();
+  await PT.undo();
+  await ensureItemsAdded(b1_info);
+  ensureTags([TAG_1, TAG_2]);
+
+  // The redo calls below cleanup everything we did.
+  observer.reset();
+  await PT.redo();
+  await ensureItemsRemoved(b1_info);
+  ensureTags([TAG_1, TAG_2]);
+
+  observer.reset();
+  await PT.redo();
+  // The tag containers are removed in async and take some time
+  let oldCountTag1 = 0;
+  let oldCountTag2 = 0;
+  let allTags = await bmsvc.fetchTags();
+  for (let i of allTags) {
+    if (i.name == TAG_1) {
+      oldCountTag1 = i.count;
+    }
+    if (i.name == TAG_2) {
+      oldCountTag2 = i.count;
+    }
+  }
+  await TestUtils.waitForCondition(async () => {
+    allTags = await bmsvc.fetchTags();
+    let newCountTag1 = 0;
+    let newCountTag2 = 0;
+    for (let i of allTags) {
+      if (i.name == TAG_1) {
+        newCountTag1 = i.count;
+      }
+      if (i.name == TAG_2) {
+        newCountTag2 = i.count;
+      }
+    }
+    return newCountTag1 == oldCountTag1 - 1 && newCountTag2 == oldCountTag2 - 1;
+  });
+  await ensureItemsRemoved(b2_info);
+
+  ensureTags([]);
+
+  observer.reset();
+  await PT.redo();
+  await ensureItemsRemoved(folder_info);
+  ensureTags([]);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_creating_and_removing_a_separator() {
+  let folder_info = createTestFolderInfo();
+  let separator_info = {};
+  let undoEntries = [];
+
+  observer.reset();
+  let folder_txn = PT.NewFolder(folder_info);
+  let separator_txn;
+  let results = await PT.batch([
+    folder_txn,
+    previousResults => {
+      separator_info.parentGuid = previousResults[0];
+      return (separator_txn = PT.NewSeparator(separator_info));
+    },
+  ]);
+  folder_info.guid = results[0];
+  separator_info.guid = results[1];
+
+  undoEntries.unshift([separator_txn, folder_txn]);
+  ensureUndoState(undoEntries, 0);
+  ensureItemsAdded(folder_info, separator_info);
+
+  observer.reset();
+  await PT.undo();
+  ensureUndoState(undoEntries, 1);
+  ensureItemsRemoved(folder_info, separator_info);
+
+  observer.reset();
+  await PT.redo();
+  ensureUndoState(undoEntries, 0);
+  ensureItemsAdded(folder_info, separator_info);
+
+  observer.reset();
+  let remove_sep_txn = PT.Remove(separator_info);
+  await remove_sep_txn.transact();
+  undoEntries.unshift([remove_sep_txn]);
+  ensureUndoState(undoEntries, 0);
+  ensureItemsRemoved(separator_info);
+
+  observer.reset();
+  await PT.undo();
+  ensureUndoState(undoEntries, 1);
+  ensureItemsAdded(separator_info);
+
+  observer.reset();
+  await PT.undo();
+  ensureUndoState(undoEntries, 2);
+  ensureItemsRemoved(folder_info, separator_info);
+
+  observer.reset();
+  await PT.redo();
+  ensureUndoState(undoEntries, 1);
+  ensureItemsAdded(folder_info, separator_info);
+
+  // Clear redo entries and check that |redo| does nothing
+  observer.reset();
+  await PT.clearTransactionsHistory(false, true);
+  undoEntries.shift();
+  ensureUndoState(undoEntries, 0);
+  await PT.redo();
+  ensureItemsAdded();
+  ensureItemsRemoved();
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureUndoState(undoEntries, 1);
+  ensureItemsRemoved(folder_info, separator_info);
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_edit_title() {
+  let bm_info = {
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "http://test_create_item.com",
+    title: "Original Title",
+  };
+
+  function ensureTitleChange(aCurrentTitle) {
+    ensureItemsTitleChanged({
+      guid: bm_info.guid,
+      title: aCurrentTitle,
+      parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    });
+  }
+
+  bm_info.guid = await PT.NewBookmark(bm_info).transact();
+
+  observer.reset();
+  await PT.EditTitle({ guid: bm_info.guid, title: "New Title" }).transact();
+  ensureTitleChange("New Title");
+
+  observer.reset();
+  await PT.undo();
+  ensureTitleChange("Original Title");
+
+  observer.reset();
+  await PT.redo();
+  ensureTitleChange("New Title");
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureTitleChange("Original Title");
+  await PT.undo();
+  ensureItemsRemoved(bm_info);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_edit_url() {
+  let oldURI = "http://old.test_editing_item_uri.com/";
+  let newURI = "http://new.test_editing_item_uri.com/";
+  let bm_info = {
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: oldURI,
+    tags: ["TestTag"],
+  };
+  function ensureURIAndTags(
+    aPreChangeURI,
+    aPostChangeURI,
+    aOLdURITagsPreserved
+  ) {
+    ensureItemsUrlChanged({
+      guid: bm_info.guid,
+      url: aPostChangeURI,
+    });
+    ensureTagsForURI(aPostChangeURI, bm_info.tags);
+    ensureTagsForURI(aPreChangeURI, aOLdURITagsPreserved ? bm_info.tags : []);
+  }
+
+  bm_info.guid = await PT.NewBookmark(bm_info).transact();
+  ensureTagsForURI(oldURI, bm_info.tags);
+
+  // When there's a single bookmark for the same url, tags should be moved.
+  observer.reset();
+  await PT.EditUrl({ guid: bm_info.guid, url: newURI }).transact();
+  ensureURIAndTags(oldURI, newURI, false);
+
+  observer.reset();
+  await PT.undo();
+  ensureURIAndTags(newURI, oldURI, false);
+
+  observer.reset();
+  await PT.redo();
+  ensureURIAndTags(oldURI, newURI, false);
+
+  observer.reset();
+  await PT.undo();
+  ensureURIAndTags(newURI, oldURI, false);
+
+  // When there're multiple bookmarks for the same url, tags should be copied.
+  let bm2_info = Object.create(bm_info);
+  bm2_info.guid = await PT.NewBookmark(bm2_info).transact();
+  let bm3_info = Object.create(bm_info);
+  bm3_info.url = newURI;
+  bm3_info.guid = await PT.NewBookmark(bm3_info).transact();
+
+  observer.reset();
+  await PT.EditUrl({ guid: bm_info.guid, url: newURI }).transact();
+  ensureURIAndTags(oldURI, newURI, true);
+
+  observer.reset();
+  await PT.undo();
+  ensureURIAndTags(newURI, oldURI, true);
+
+  observer.reset();
+  await PT.redo();
+  ensureURIAndTags(oldURI, newURI, true);
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureURIAndTags(newURI, oldURI, true);
+  await PT.undo();
+  await PT.undo();
+  await PT.undo();
+  ensureItemsRemoved(bm3_info, bm2_info, bm_info);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_edit_keyword() {
+  let bm_info = {
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "http://test.edit.keyword/",
+  };
+  const KEYWORD = "test_keyword";
+  bm_info.guid = await PT.NewBookmark(bm_info).transact();
+  function ensureKeywordChange(aCurrentKeyword = "") {
+    ensureItemsKeywordChanged({
+      guid: bm_info.guid,
+      keyword: aCurrentKeyword,
+    });
+  }
+
+  bm_info.guid = await PT.NewBookmark(bm_info).transact();
+
+  observer.reset();
+  await PT.EditKeyword({
+    guid: bm_info.guid,
+    keyword: KEYWORD,
+    postData: "postData",
+  }).transact();
+  ensureKeywordChange(KEYWORD);
+  let entry = await PlacesUtils.keywords.fetch(KEYWORD);
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, "postData");
+
+  observer.reset();
+  await PT.undo();
+  ensureKeywordChange();
+  entry = await PlacesUtils.keywords.fetch(KEYWORD);
+  Assert.equal(entry, null);
+
+  observer.reset();
+  await PT.redo();
+  ensureKeywordChange(KEYWORD);
+  entry = await PlacesUtils.keywords.fetch(KEYWORD);
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, "postData");
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureKeywordChange();
+  await PT.undo();
+  ensureItemsRemoved(bm_info);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_edit_keyword_null_postData() {
+  let bm_info = {
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "http://test.edit.keyword/",
+  };
+  const KEYWORD = "test_keyword";
+  bm_info.guid = await PT.NewBookmark(bm_info).transact();
+  function ensureKeywordChange(aCurrentKeyword = "") {
+    ensureItemsKeywordChanged({
+      guid: bm_info.guid,
+      keyword: aCurrentKeyword,
+    });
+  }
+
+  bm_info.guid = await PT.NewBookmark(bm_info).transact();
+
+  observer.reset();
+  await PT.EditKeyword({
+    guid: bm_info.guid,
+    keyword: KEYWORD,
+    postData: null,
+  }).transact();
+  ensureKeywordChange(KEYWORD);
+  let entry = await PlacesUtils.keywords.fetch(KEYWORD);
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, null);
+
+  observer.reset();
+  await PT.undo();
+  ensureKeywordChange();
+  entry = await PlacesUtils.keywords.fetch(KEYWORD);
+  Assert.equal(entry, null);
+
+  observer.reset();
+  await PT.redo();
+  ensureKeywordChange(KEYWORD);
+  entry = await PlacesUtils.keywords.fetch(KEYWORD);
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, null);
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureKeywordChange();
+  await PT.undo();
+  ensureItemsRemoved(bm_info);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_edit_specific_keyword() {
+  let bm_info = {
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "http://test.edit.keyword/",
+  };
+  bm_info.guid = await PT.NewBookmark(bm_info).transact();
+  function ensureKeywordChange(aCurrentKeyword = "", aPreviousKeyword = "") {
+    ensureItemsKeywordChanged({
+      guid: bm_info.guid,
+      keyword: aCurrentKeyword,
+    });
+  }
+
+  await PlacesUtils.keywords.insert({
+    keyword: "kw1",
+    url: bm_info.url,
+    postData: "postData1",
+  });
+  await PlacesUtils.keywords.insert({
+    keyword: "kw2",
+    url: bm_info.url,
+    postData: "postData2",
+  });
+  bm_info.guid = await PT.NewBookmark(bm_info).transact();
+
+  observer.reset();
+  await PT.EditKeyword({
+    guid: bm_info.guid,
+    keyword: "keyword",
+    oldKeyword: "kw2",
+  }).transact();
+  ensureKeywordChange("keyword", "kw2");
+  let entry = await PlacesUtils.keywords.fetch("kw1");
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, "postData1");
+  entry = await PlacesUtils.keywords.fetch("keyword");
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, "postData2");
+  entry = await PlacesUtils.keywords.fetch("kw2");
+  Assert.equal(entry, null);
+
+  observer.reset();
+  await PT.undo();
+  ensureKeywordChange("kw2", "keyword");
+  entry = await PlacesUtils.keywords.fetch("kw1");
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, "postData1");
+  entry = await PlacesUtils.keywords.fetch("kw2");
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, "postData2");
+  entry = await PlacesUtils.keywords.fetch("keyword");
+  Assert.equal(entry, null);
+
+  observer.reset();
+  await PT.redo();
+  ensureKeywordChange("keyword", "kw2");
+  entry = await PlacesUtils.keywords.fetch("kw1");
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, "postData1");
+  entry = await PlacesUtils.keywords.fetch("keyword");
+  Assert.equal(entry.url.href, bm_info.url);
+  Assert.equal(entry.postData, "postData2");
+  entry = await PlacesUtils.keywords.fetch("kw2");
+  Assert.equal(entry, null);
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureKeywordChange("kw2");
+  await PT.undo();
+  ensureItemsRemoved(bm_info);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_tag_uri() {
+  // This also tests passing uri specs.
+  let bm_info_a = {
+    url: "http://bookmarked.uri",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  };
+  let bm_info_b = {
+    url: "http://bookmarked2.uri",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  };
+  let unbookmarked_uri = "http://un.bookmarked.uri";
+
+  let results = await PT.batch([
+    PT.NewBookmark(bm_info_a),
+    PT.NewBookmark(bm_info_b),
+  ]);
+  bm_info_a.guid = results[0];
+  bm_info_b.guid = results[1];
+
+  async function doTest(aInfo) {
+    let urls = "url" in aInfo ? [aInfo.url] : aInfo.urls;
+    let tags = "tag" in aInfo ? [aInfo.tag] : aInfo.tags;
+
+    let tagWillAlsoBookmark = new Set();
+    for (let url of urls) {
+      if (!(await bmsvc.fetch({ url }))) {
+        tagWillAlsoBookmark.add(url);
+      }
+    }
+
+    async function ensureTagsSet() {
+      for (let url of urls) {
+        ensureTagsForURI(url, tags);
+        Assert.ok(await bmsvc.fetch({ url }));
+      }
+    }
+    async function ensureTagsUnset() {
+      for (let url of urls) {
+        ensureTagsForURI(url, []);
+        if (tagWillAlsoBookmark.has(url)) {
+          Assert.ok(!(await bmsvc.fetch({ url })));
+        } else {
+          Assert.ok(await bmsvc.fetch({ url }));
+        }
+      }
+    }
+
+    await PT.Tag(aInfo).transact();
+    await ensureTagsSet();
+    await PT.undo();
+    await ensureTagsUnset();
+    await PT.redo();
+    await ensureTagsSet();
+    await PT.undo();
+    await ensureTagsUnset();
+  }
+
+  await doTest({ url: bm_info_a.url, tags: ["MyTag"] });
+  await doTest({ urls: [bm_info_a.url], tag: "MyTag" });
+  await doTest({ urls: [bm_info_a.url, bm_info_b.url], tags: ["A, B"] });
+  await doTest({ urls: [bm_info_a.url, unbookmarked_uri], tag: "C" });
+  // Duplicate URLs listed.
+  await doTest({
+    urls: [bm_info_a.url, bm_info_b.url, bm_info_a.url],
+    tag: "D",
+  });
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureItemsRemoved(bm_info_a, bm_info_b);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_untag_uri() {
+  let bm_info_a = {
+    url: "http://bookmarked.uri",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    tags: ["A", "B"],
+  };
+  let bm_info_b = {
+    url: "http://bookmarked2.uri",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    tag: "B",
+  };
+
+  let results = await PT.batch([
+    PT.NewBookmark(bm_info_a),
+    PT.NewBookmark(bm_info_b),
+  ]);
+  ensureTagsForURI(bm_info_a.url, bm_info_a.tags);
+  ensureTagsForURI(bm_info_b.url, [bm_info_b.tag]);
+  bm_info_a.guid = results[0];
+
+  bm_info_b.guid = results[1];
+
+  async function doTest(aInfo) {
+    let urls, tagsRemoved;
+    if (typeof aInfo == "string") {
+      urls = [aInfo];
+      tagsRemoved = [];
+    } else if (Array.isArray(aInfo)) {
+      urls = aInfo;
+      tagsRemoved = [];
+    } else {
+      urls = "url" in aInfo ? [aInfo.url] : aInfo.urls;
+      tagsRemoved = "tag" in aInfo ? [aInfo.tag] : aInfo.tags;
+    }
+
+    let preRemovalTags = new Map();
+    for (let url of urls) {
+      preRemovalTags.set(url, tagssvc.getTagsForURI(Services.io.newURI(url)));
+    }
+
+    function ensureTagsSet() {
+      for (let url of urls) {
+        ensureTagsForURI(url, preRemovalTags.get(url));
+      }
+    }
+    function ensureTagsUnset() {
+      for (let url of urls) {
+        let expectedTags = !tagsRemoved.length
+          ? []
+          : preRemovalTags.get(url).filter(tag => !tagsRemoved.includes(tag));
+        ensureTagsForURI(url, expectedTags);
+      }
+    }
+
+    await PT.Untag(aInfo).transact();
+    await ensureTagsUnset();
+    await PT.undo();
+    await ensureTagsSet();
+    await PT.redo();
+    await ensureTagsUnset();
+    await PT.undo();
+    await ensureTagsSet();
+  }
+
+  await doTest(bm_info_a);
+  await doTest(bm_info_b);
+  await doTest(bm_info_a.url);
+  await doTest(bm_info_b.url);
+  await doTest([bm_info_a.url, bm_info_b.url]);
+  await doTest({ urls: [bm_info_a.url, bm_info_b.url], tags: ["A", "B"] });
+  await doTest({ urls: [bm_info_a.url, bm_info_b.url], tag: "B" });
+  await doTest({ urls: [bm_info_a.url, bm_info_b.url], tag: "C" });
+  await doTest({ urls: [bm_info_a.url, bm_info_b.url], tags: ["C"] });
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureItemsRemoved(bm_info_a, bm_info_b);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+});
+
+add_task(async function test_sort_folder_by_name() {
+  let folder_info = createTestFolderInfo();
+
+  let url = "http://sort.by.name/";
+  let preSep = ["3", "2", "1"].map(i => ({ title: i, url }));
+  let sep = {};
+  let postSep = ["c", "b", "a"].map(l => ({ title: l, url }));
+  let originalOrder = [...preSep, sep, ...postSep];
+  let sortedOrder = [
+    ...preSep.slice(0).reverse(),
+    sep,
+    ...postSep.slice(0).reverse(),
+  ];
+
+  let folder_txn = await PT.NewFolder(folder_info);
+  let transactions = [folder_txn];
+  for (let info of originalOrder) {
+    transactions.push(previousResults => {
+      info.parentGuid = previousResults[0];
+      return info == sep ? PT.NewSeparator(info) : PT.NewBookmark(info);
+    });
+  }
+  let results = await PT.batch(transactions);
+  folder_info.guid = results[0];
+  for (let i = 0; i < originalOrder.length; ++i) {
+    originalOrder[i].guid = results[i + 1];
+  }
+
+  let folderContainer = PlacesUtils.getFolderContents(folder_info.guid).root;
+  function ensureOrder(aOrder) {
+    for (let i = 0; i < folderContainer.childCount; i++) {
+      Assert.equal(folderContainer.getChild(i).bookmarkGuid, aOrder[i].guid);
+    }
+  }
+
+  ensureOrder(originalOrder);
+  await PT.SortByName(folder_info.guid).transact();
+  ensureOrder(sortedOrder);
+  await PT.undo();
+  ensureOrder(originalOrder);
+  await PT.redo();
+  ensureOrder(sortedOrder);
+
+  // Cleanup
+  observer.reset();
+  await PT.undo();
+  ensureOrder(originalOrder);
+  await PT.undo();
+  ensureItemsRemoved(...originalOrder, folder_info);
+});
+
+add_task(async function test_copy() {
+  async function duplicate_and_test(aOriginalGuid) {
+    let txn = PT.Copy({
+      guid: aOriginalGuid,
+      newParentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    });
+    let duplicateGuid = await txn.transact();
+    let originalInfo = await PlacesUtils.promiseBookmarksTree(aOriginalGuid);
+    let duplicateInfo = await PlacesUtils.promiseBookmarksTree(duplicateGuid);
+    await ensureEqualBookmarksTrees(originalInfo, duplicateInfo, false);
+
+    async function redo() {
+      await PT.redo();
+      await ensureBookmarksTreeRestoredCorrectlyExceptDates(originalInfo);
+      await PT.redo();
+      await ensureBookmarksTreeRestoredCorrectlyExceptDates(duplicateInfo);
+    }
+    async function undo() {
+      await PT.undo();
+      // also undo the original item addition.
+      await PT.undo();
+      await ensureNonExistent(aOriginalGuid, duplicateGuid);
+    }
+
+    await undo();
+    await redo();
+    await undo();
+    await redo();
+
+    // Cleanup. This also remove the original item.
+    await PT.undo();
+    observer.reset();
+    await PT.clearTransactionsHistory();
+  }
+
+  let timerPrecision = Preferences.get("privacy.reduceTimerPrecision");
+  Preferences.set("privacy.reduceTimerPrecision", false);
+
+  registerCleanupFunction(function () {
+    Preferences.set("privacy.reduceTimerPrecision", timerPrecision);
+  });
+
+  // Test duplicating leafs (bookmark, separator, empty folder)
+  PT.NewBookmark({
+    url: "http://test.item.duplicate",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    annos: [{ name: "Anno", value: "AnnoValue" }],
+  });
+  let sepTxn = PT.NewSeparator({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    index: 1,
+  });
+
+  let emptyFolderTxn = PT.NewFolder(createTestFolderInfo());
+  for (let txn of [sepTxn, emptyFolderTxn]) {
+    let guid = await txn.transact();
+    await duplicate_and_test(guid);
+  }
+
+  // Test duplicating a folder having some contents.
+  let results = await PT.batch([
+    PT.NewFolder(createTestFolderInfo()),
+    previousResults =>
+      PT.NewFolder({
+        parentGuid: previousResults[0],
+        title: "Nested Folder",
+      }),
+    // Insert a bookmark under the nested folder.
+    previousResults =>
+      PT.NewBookmark({
+        url: "http://nested.nested.bookmark",
+        parentGuid: previousResults[1],
+      }),
+    // Insert a separator below the nested folder
+    previousResults => PT.NewSeparator({ parentGuid: previousResults[0] }),
+    // And another bookmark.
+    previousResults =>
+      PT.NewBookmark({
+        url: "http://nested.bookmark",
+        parentGuid: previousResults[0],
+      }),
+  ]);
+  let filledFolderGuid = results[0];
+
+  await duplicate_and_test(filledFolderGuid);
+
+  // Cleanup
+  await PT.clearTransactionsHistory();
+});
+
+add_task(async function test_array_input_for_batch() {
+  let folderTxn = PT.NewFolder(createTestFolderInfo());
+  let folderGuid = await folderTxn.transact();
+
+  let sep1_txn = PT.NewSeparator({ parentGuid: folderGuid });
+  let sep2_txn = PT.NewSeparator({ parentGuid: folderGuid });
+  await PT.batch([sep1_txn, sep2_txn]);
+  ensureUndoState([[sep2_txn, sep1_txn], [folderTxn]], 0);
+
+  let ensureChildCount = async function (count) {
+    let tree = await PlacesUtils.promiseBookmarksTree(folderGuid);
+    if (count == 0) {
+      Assert.ok(!("children" in tree));
+    } else {
+      Assert.equal(tree.children.length, count);
+    }
+  };
+
+  await ensureChildCount(2);
+  await PT.undo();
+  await ensureChildCount(0);
+  await PT.redo();
+  await ensureChildCount(2);
+  await PT.undo();
+  await ensureChildCount(0);
+
+  await PT.undo();
+  Assert.equal(await PlacesUtils.promiseBookmarksTree(folderGuid), null);
+
+  // Cleanup
+  await PT.clearTransactionsHistory();
+});
+
+add_task(async function test_invalid_uri_spec_throws() {
+  Assert.throws(
+    () =>
+      PT.NewBookmark({
+        parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+        url: "invalid uri spec",
+        title: "test bookmark",
+      }),
+    /invalid uri spec is not a valid URL/
+  );
+  Assert.throws(
+    () => PT.Tag({ tag: "TheTag", urls: ["invalid uri spec"] }),
+    /TypeError: URL constructor: invalid uri spec is not a valid URL/
+  );
+  Assert.throws(
+    () => PT.Tag({ tag: "TheTag", urls: ["about:blank", "invalid uri spec"] }),
+    /TypeError: URL constructor: invalid uri spec is not a valid URL/
+  );
+});
+
+add_task(async function test_remove_multiple() {
+  let results = await PT.batch([
+    PT.NewFolder({
+      title: "Test Folder",
+      parentGuid: menuGuid,
+    }),
+    previousResults =>
+      PT.NewFolder({
+        title: "Nested Test Folder",
+        parentGuid: previousResults[0],
+      }),
+    previousResults => PT.NewSeparator(previousResults[1]),
+    PT.NewBookmark({
+      url: "http://test.bookmark.removed",
+      parentGuid: menuGuid,
+    }),
+  ]);
+  let guids = [results[0], results[3]];
+
+  let originalInfos = [];
+  for (let guid of guids) {
+    originalInfos.push(await PlacesUtils.promiseBookmarksTree(guid));
+  }
+
+  await PT.Remove(guids).transact();
+  await ensureNonExistent(...guids);
+  await PT.undo();
+  await ensureBookmarksTreeRestoredCorrectly(...originalInfos);
+  await PT.redo();
+  await ensureNonExistent(...guids);
+  await PT.undo();
+  await ensureBookmarksTreeRestoredCorrectly(...originalInfos);
+
+  // Undo the New* transactions batch.
+  await PT.undo();
+  await ensureNonExistent(...guids);
+
+  // Redo it.
+  await PT.redo();
+  await ensureBookmarksTreeRestoredCorrectlyExceptDates(...originalInfos);
+
+  // Redo remove.
+  await PT.redo();
+  await ensureNonExistent(...guids);
+
+  // Cleanup
+  await PT.clearTransactionsHistory();
+  observer.reset();
+});
+
+add_task(async function test_renameTag() {
+  let url = "http://test.edit.keyword/";
+  await PT.Tag({ url, tags: ["t1", "t2"] }).transact();
+  ensureTagsForURI(url, ["t1", "t2"]);
+
+  // Create bookmark queries that point to the modified tag.
+  let bm1 = await PlacesUtils.bookmarks.insert({
+    url: "place:tag=t2",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  let bm2 = await PlacesUtils.bookmarks.insert({
+    url: "place:tag=t2&sort=1",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  // This points to 2 tags, and as such won't be touched.
+  let bm3 = await PlacesUtils.bookmarks.insert({
+    url: "place:tag=t2&tag=t1",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+
+  await PT.RenameTag({ oldTag: "t2", tag: "t3" }).transact();
+  ensureTagsForURI(url, ["t1", "t3"]);
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm1.guid)).url.href,
+    "place:tag=t3",
+    "The fitst bookmark has been updated"
+  );
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm2.guid)).url.href,
+    "place:tag=t3&sort=1",
+    "The second bookmark has been updated"
+  );
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm3.guid)).url.href,
+    "place:tag=t3&tag=t1",
+    "The third bookmark has been updated"
+  );
+
+  await PT.undo();
+  ensureTagsForURI(url, ["t1", "t2"]);
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm1.guid)).url.href,
+    "place:tag=t2",
+    "The fitst bookmark has been restored"
+  );
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm2.guid)).url.href,
+    "place:tag=t2&sort=1",
+    "The second bookmark has been restored"
+  );
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm3.guid)).url.href,
+    "place:tag=t2&tag=t1",
+    "The third bookmark has been restored"
+  );
+
+  await PT.redo();
+  ensureTagsForURI(url, ["t1", "t3"]);
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm1.guid)).url.href,
+    "place:tag=t3",
+    "The fitst bookmark has been updated"
+  );
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm2.guid)).url.href,
+    "place:tag=t3&sort=1",
+    "The second bookmark has been updated"
+  );
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm3.guid)).url.href,
+    "place:tag=t3&tag=t1",
+    "The third bookmark has been updated"
+  );
+
+  await PT.undo();
+  ensureTagsForURI(url, ["t1", "t2"]);
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm1.guid)).url.href,
+    "place:tag=t2",
+    "The fitst bookmark has been restored"
+  );
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm2.guid)).url.href,
+    "place:tag=t2&sort=1",
+    "The second bookmark has been restored"
+  );
+  Assert.equal(
+    (await PlacesUtils.bookmarks.fetch(bm3.guid)).url.href,
+    "place:tag=t2&tag=t1",
+    "The third bookmark has been restored"
+  );
+
+  await PT.undo();
+  ensureTagsForURI(url, []);
+
+  await PT.clearTransactionsHistory();
+  ensureUndoState();
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_remove_invalid_url() {
+  let folderGuid = await PT.NewFolder({
+    title: "Test Folder",
+    parentGuid: menuGuid,
+  }).transact();
+
+  let guid = "invalid_____";
+  let folderedGuid = "invalid____2";
+  let url = "invalid-uri";
+  await PlacesUtils.withConnectionWrapper("test_bookmarks_remove", async db => {
+    await db.execute(
+      `
+      INSERT INTO moz_places(url, url_hash, title, rev_host, guid)
+      VALUES (:url, hash(:url), 'Invalid URI', '.', GENERATE_GUID())
+    `,
+      { url }
+    );
+    await db.execute(
+      `INSERT INTO moz_bookmarks (type, fk, parent, position, guid)
+        VALUES (:type,
+                (SELECT id FROM moz_places WHERE url = :url),
+                (SELECT id FROM moz_bookmarks WHERE guid = :parentGuid),
+                (SELECT MAX(position) + 1 FROM moz_bookmarks WHERE parent = (SELECT id FROM moz_bookmarks WHERE guid = :parentGuid)),
+                :guid)
+      `,
+      {
+        type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
+        url,
+        parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+        guid,
+      }
+    );
+    await db.execute(
+      `INSERT INTO moz_bookmarks (type, fk, parent, position, guid)
+        VALUES (:type,
+                (SELECT id FROM moz_places WHERE url = :url),
+                (SELECT id FROM moz_bookmarks WHERE guid = :parentGuid),
+                (SELECT MAX(position) + 1 FROM moz_bookmarks WHERE parent = (SELECT id FROM moz_bookmarks WHERE guid = :parentGuid)),
+                :guid)
+      `,
+      {
+        type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
+        url,
+        parentGuid: folderGuid,
+        guid: folderedGuid,
+      }
+    );
+  });
+
+  let guids = [folderGuid, guid];
+  await PT.Remove(guids).transact();
+  await ensureNonExistent(...guids, folderedGuid);
+  // Shouldn't throw, should restore the folder but not the bookmarks.
+  await PT.undo();
+  await ensureNonExistent(guid, folderedGuid);
+  Assert.ok(
+    await PlacesUtils.bookmarks.fetch(folderGuid),
+    "The folder should have been re-created"
+  );
+  await PT.redo();
+  await ensureNonExistent(guids, folderedGuid);
+  // Cleanup
+  await PT.clearTransactionsHistory();
+  observer.reset();
+});
diff --git a/toolkit/components/places/tests/unit/test_autocomplete_match_fallbackTitle.js b/toolkit/components/places/tests/unit/test_autocomplete_match_fallbackTitle.js
new file mode 100644
index 0000000000..109ca1edce
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_autocomplete_match_fallbackTitle.js
@@ -0,0 +1,27 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// This is a test for the fallbackTitle argument of autocomplete_match.
+
+add_task(async function test_match() {
+  async function search(text) {
+    let db = await PlacesUtils.promiseDBConnection();
+    let rows = await db.execute(
+      `
+      SELECT AUTOCOMPLETE_MATCH(:text, 'http://mozilla.org/', 'Main title',
+                                NULL, NULL, 1, 1, NULL,
+                                :matchBehavior, :searchBehavior,
+                                'Fallback title')
+      `,
+      {
+        text,
+        matchBehavior: Ci.mozIPlacesAutoComplete.MATCH_ANYWHERE,
+        searchBehavior: 643,
+      }
+    );
+    return !!rows[0].getResultByIndex(0);
+  }
+  Assert.ok(await search("mai"), "Match on main title");
+  Assert.ok(await search("fall"), "Match on fallback title");
+});
diff --git a/toolkit/components/places/tests/unit/test_bookmark-tags-changed_frequency.js b/toolkit/components/places/tests/unit/test_bookmark-tags-changed_frequency.js
new file mode 100644
index 0000000000..d7f0cf21c8
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmark-tags-changed_frequency.js
@@ -0,0 +1,56 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// This test checks that changing a tag for a bookmark with multiple tags
+// notifies bookmark-tags-changed event only once, and not once per tag.
+
+add_task(async function run_test() {
+  let tags = ["a", "b", "c"];
+  let uri = Services.io.newURI("http://1.moz.org/");
+
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: uri,
+    title: "Bookmark 1",
+  });
+  PlacesUtils.tagging.tagURI(uri, tags);
+
+  let promise = Promise.withResolvers();
+
+  let bookmarksObserver = {
+    _changedCount: 0,
+    handlePlacesEvents(events) {
+      for (let event of events) {
+        switch (event.type) {
+          case "bookmark-removed":
+            if (event.guid == bookmark.guid) {
+              PlacesUtils.observers.removeListener(
+                ["bookmark-removed"],
+                this.handlePlacesEvents
+              );
+              Assert.equal(this._changedCount, 2);
+              promise.resolve();
+            }
+            break;
+          case "bookmark-tags-changed":
+            Assert.equal(event.guid, bookmark.guid);
+            this._changedCount++;
+            break;
+        }
+      }
+    },
+  };
+  bookmarksObserver.handlePlacesEvents =
+    bookmarksObserver.handlePlacesEvents.bind(bookmarksObserver);
+  PlacesUtils.observers.addListener(
+    ["bookmark-removed", "bookmark-tags-changed"],
+    bookmarksObserver.handlePlacesEvents
+  );
+
+  PlacesUtils.tagging.tagURI(uri, ["d"]);
+  PlacesUtils.tagging.tagURI(uri, ["e"]);
+
+  await promise;
+
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+});
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_html.js b/toolkit/components/places/tests/unit/test_bookmarks_html.js
new file mode 100644
index 0000000000..4b3f04b444
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_html.js
@@ -0,0 +1,417 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// An object representing the contents of bookmarks.preplaces.html.
+var test_bookmarks = {
+  menu: [
+    {
+      title: "Mozilla Firefox",
+      children: [
+        {
+          title: "Help and Tutorials",
+          url: "http://en-us.www.mozilla.com/en-US/firefox/help/",
+          icon: "data:image/png;base64,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",
+        },
+        {
+          title: "Customize Firefox",
+          url: "http://en-us.www.mozilla.com/en-US/firefox/customize/",
+          icon: "data:image/png;base64,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",
+        },
+        {
+          title: "Get Involved",
+          url: "http://en-us.www.mozilla.com/en-US/firefox/community/",
+          icon: "data:image/png;base64,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",
+        },
+        {
+          title: "About Us",
+          url: "http://en-us.www.mozilla.com/en-US/about/",
+          icon: "data:image/png;base64,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",
+        },
+      ],
+    },
+    {
+      type: Ci.nsINavHistoryResultNode.RESULT_TYPE_SEPARATOR,
+    },
+    {
+      title: "test",
+      dateAdded: 1177541020000000,
+      lastModified: 1177541050000000,
+      children: [
+        {
+          title: "test post keyword",
+          dateAdded: 1177375336000000,
+          lastModified: 1177375423000000,
+          keyword: "test",
+          postData: "hidden1%3Dbar&text1%3D%25s",
+          charset: "ISO-8859-1",
+          url: "http://test/post",
+        },
+      ],
+    },
+  ],
+  toolbar: [
+    {
+      title: "Getting Started",
+      url: "http://en-us.www.mozilla.com/en-US/firefox/central/",
+      icon: "data:image/png;base64,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",
+    },
+    {
+      title: "Latest Headlines",
+      url: "http://en-us.fxfeeds.mozilla.com/en-US/firefox/livebookmarks/",
+      feedUrl: "http://en-us.fxfeeds.mozilla.com/en-US/firefox/headlines.xml",
+    },
+    // This will be ignored, because it has no url.
+    {
+      title: "Latest Headlines No Site",
+      feedUrl: "http://en-us.fxfeeds.mozilla.com/en-US/firefox/headlines.xml",
+      ignore: true,
+    },
+  ],
+  unfiled: [{ title: "Example.tld", url: "http://example.tld/" }],
+};
+
+// Pre-Places bookmarks.html file pointer.
+var gBookmarksFileOld;
+// Places bookmarks.html file pointer.
+var gBookmarksFileNew;
+
+add_task(async function setup() {
+  // File pointer to legacy bookmarks file.
+  gBookmarksFileOld = PathUtils.join(
+    do_get_cwd().path,
+    "bookmarks.preplaces.html"
+  );
+
+  // File pointer to a new Places-exported bookmarks file.
+  gBookmarksFileNew = PathUtils.join(
+    PathUtils.profileDir,
+    "bookmarks.exported.html"
+  );
+  await IOUtils.remove(gBookmarksFileNew, { ignoreAbsent: true });
+
+  // This test must be the first one, since it setups the new bookmarks.html.
+  // Test importing a pre-Places canonical bookmarks file.
+  // 1. import bookmarks.preplaces.html
+  // 2. run the test-suite
+  // Note: we do not empty the db before this import to catch bugs like 380999
+  await BookmarkHTMLUtils.importFromFile(gBookmarksFileOld, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await testImportedBookmarks();
+
+  await BookmarkHTMLUtils.exportToFile(gBookmarksFileNew);
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_import_count() {
+  // Ensure the bookmarks count is correct when importing in various cases
+  let count = await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, {
+    replace: true,
+  });
+  Assert.equal(
+    count,
+    8,
+    "There should be 8 imported bookmarks when importing from an empty database"
+  );
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await BookmarkHTMLUtils.exportToFile(gBookmarksFileNew);
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  count = -1;
+  count = await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, {
+    replace: true,
+  });
+  Assert.equal(
+    count,
+    8,
+    "There should be 8 imported bookmarks when replacing existing bookmarks"
+  );
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  count = -1;
+  count = await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew);
+  Assert.equal(
+    count,
+    8,
+    "There should be 8 imported bookmarks even when we are not replacing existing bookmarks"
+  );
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_import_new() {
+  // Test importing a Places bookmarks.html file.
+  // 1. import bookmarks.exported.html
+  // 2. run the test-suite
+  await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  await testImportedBookmarks();
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_emptytitle_export() {
+  // Test exporting and importing with an empty-titled bookmark.
+  // 1. import bookmarks
+  // 2. create an empty-titled bookmark.
+  // 3. export to bookmarks.exported.html
+  // 4. empty bookmarks db
+  // 5. import bookmarks.exported.html
+  // 6. run the test-suite
+  // 7. remove the empty-titled bookmark
+  // 8. export to bookmarks.exported.html
+  // 9. empty bookmarks db and continue
+
+  await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  const NOTITLE_URL = "http://notitle.mozilla.org/";
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: NOTITLE_URL,
+  });
+  test_bookmarks.unfiled.push({ title: "", url: NOTITLE_URL });
+
+  await BookmarkHTMLUtils.exportToFile(gBookmarksFileNew);
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await PlacesUtils.bookmarks.eraseEverything();
+
+  await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await testImportedBookmarks();
+
+  // Cleanup.
+  test_bookmarks.unfiled.pop();
+  // HTML imports don't restore GUIDs yet.
+  let reimportedBookmark = await PlacesUtils.bookmarks.fetch({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    index: PlacesUtils.bookmarks.DEFAULT_INDEX,
+  });
+  Assert.equal(reimportedBookmark.url.href, bookmark.url.href);
+  await PlacesUtils.bookmarks.remove(reimportedBookmark);
+
+  await BookmarkHTMLUtils.exportToFile(gBookmarksFileNew);
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_import_chromefavicon() {
+  // Test exporting and importing with a bookmark pointing to a chrome favicon.
+  // 1. import bookmarks
+  // 2. create a bookmark pointing to a chrome favicon.
+  // 3. export to bookmarks.exported.html
+  // 4. empty bookmarks db
+  // 5. import bookmarks.exported.html
+  // 6. run the test-suite
+  // 7. remove the bookmark pointing to a chrome favicon.
+  // 8. export to bookmarks.exported.html
+  // 9. empty bookmarks db and continue
+
+  const PAGE_URI = NetUtil.newURI("http://example.com/chromefavicon_page");
+  const CHROME_FAVICON_URI = NetUtil.newURI(
+    "chrome://global/skin/icons/delete.svg"
+  );
+  const CHROME_FAVICON_URI_2 = NetUtil.newURI(
+    "chrome://global/skin/icons/error.svg"
+  );
+
+  info("Importing from html");
+  await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  info("Insert bookmark");
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: PAGE_URI,
+    title: "Test",
+  });
+
+  info("Set favicon");
+  await new Promise(resolve => {
+    PlacesUtils.favicons.setAndFetchFaviconForPage(
+      PAGE_URI,
+      CHROME_FAVICON_URI,
+      true,
+      PlacesUtils.favicons.FAVICON_LOAD_NON_PRIVATE,
+      resolve,
+      Services.scriptSecurityManager.getSystemPrincipal()
+    );
+  });
+
+  let data = await new Promise(resolve => {
+    PlacesUtils.favicons.getFaviconDataForPage(
+      PAGE_URI,
+      (uri, dataLen, faviconData, mimeType) => resolve(faviconData)
+    );
+  });
+
+  let base64Icon =
+    "data:image/png;base64," +
+    base64EncodeString(String.fromCharCode.apply(String, data));
+
+  test_bookmarks.unfiled.push({
+    title: "Test",
+    url: PAGE_URI.spec,
+    icon: base64Icon,
+  });
+
+  info("Export to html");
+  await BookmarkHTMLUtils.exportToFile(gBookmarksFileNew);
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  info("Set favicon");
+  // Change the favicon to check it's really imported again later.
+  await new Promise(resolve => {
+    PlacesUtils.favicons.setAndFetchFaviconForPage(
+      PAGE_URI,
+      CHROME_FAVICON_URI_2,
+      true,
+      PlacesUtils.favicons.FAVICON_LOAD_NON_PRIVATE,
+      resolve,
+      Services.scriptSecurityManager.getSystemPrincipal()
+    );
+  });
+
+  info("import from html");
+  await PlacesUtils.bookmarks.eraseEverything();
+  await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  info("Test imported bookmarks");
+  await testImportedBookmarks();
+
+  // Cleanup.
+  test_bookmarks.unfiled.pop();
+  // HTML imports don't restore GUIDs yet.
+  let reimportedBookmark = await PlacesUtils.bookmarks.fetch({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    index: PlacesUtils.bookmarks.DEFAULT_INDEX,
+  });
+  await PlacesUtils.bookmarks.remove(reimportedBookmark);
+
+  await BookmarkHTMLUtils.exportToFile(gBookmarksFileNew);
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_import_ontop() {
+  // Test importing the exported bookmarks.html file *on top of* the existing
+  // bookmarks.
+  // 1. empty bookmarks db
+  // 2. import the exported bookmarks file
+  // 3. export to file
+  // 3. import the exported bookmarks file
+  // 4. run the test-suite
+
+  await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await BookmarkHTMLUtils.exportToFile(gBookmarksFileNew);
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  await BookmarkHTMLUtils.importFromFile(gBookmarksFileNew, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await testImportedBookmarks();
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+async function testImportedBookmarks() {
+  for (let group in test_bookmarks) {
+    info("[testImportedBookmarks()] Checking group '" + group + "'");
+
+    let root = PlacesUtils.getFolderContents(
+      PlacesUtils.bookmarks[`${group}Guid`]
+    ).root;
+
+    let items = test_bookmarks[group].filter(b => !b.ignore);
+    Assert.equal(root.childCount, items.length);
+
+    for (let key in items) {
+      await checkItem(items[key], root.getChild(key));
+    }
+
+    root.containerOpen = false;
+  }
+}
+
+function checkItem(aExpected, aNode) {
+  return (async function () {
+    let bookmark = await PlacesUtils.bookmarks.fetch(aNode.bookmarkGuid);
+
+    for (let prop in aExpected) {
+      switch (prop) {
+        case "type":
+          Assert.equal(aNode.type, aExpected.type);
+          break;
+        case "title":
+          Assert.equal(aNode.title, aExpected.title);
+          break;
+        case "dateAdded":
+          Assert.equal(
+            PlacesUtils.toPRTime(bookmark.dateAdded),
+            aExpected.dateAdded
+          );
+          break;
+        case "lastModified":
+          Assert.equal(
+            PlacesUtils.toPRTime(bookmark.lastModified),
+            aExpected.lastModified
+          );
+          break;
+        case "url":
+          Assert.equal(aNode.uri, aExpected.url);
+          break;
+        case "icon":
+          let { data } = await getFaviconDataForPage(aExpected.url);
+          let base64Icon =
+            "data:image/png;base64," +
+            base64EncodeString(String.fromCharCode.apply(String, data));
+          Assert.ok(base64Icon == aExpected.icon);
+          break;
+        case "keyword": {
+          let entry = await PlacesUtils.keywords.fetch({ url: aNode.uri });
+          Assert.equal(entry.keyword, aExpected.keyword);
+          break;
+        }
+        case "postData": {
+          let entry = await PlacesUtils.keywords.fetch({ url: aNode.uri });
+          Assert.equal(entry.postData, aExpected.postData);
+          break;
+        }
+        case "charset":
+          let pageInfo = await PlacesUtils.history.fetch(aNode.uri, {
+            includeAnnotations: true,
+          });
+          Assert.equal(
+            pageInfo.annotations.get(PlacesUtils.CHARSET_ANNO),
+            aExpected.charset
+          );
+          break;
+        case "feedUrl":
+          // No more supported.
+          break;
+        case "children":
+          let folder = aNode.QueryInterface(
+            Ci.nsINavHistoryContainerResultNode
+          );
+          Assert.equal(folder.hasChildren, !!aExpected.children.length);
+          folder.containerOpen = true;
+          Assert.equal(folder.childCount, aExpected.children.length);
+
+          for (let index = 0; index < aExpected.children.length; index++) {
+            await checkItem(aExpected.children[index], folder.getChild(index));
+          }
+
+          folder.containerOpen = false;
+          break;
+        default:
+          throw new Error("Unknown property");
+      }
+    }
+  })();
+}
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_html_corrupt.js b/toolkit/components/places/tests/unit/test_bookmarks_html_corrupt.js
new file mode 100644
index 0000000000..061c8c0c5f
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_html_corrupt.js
@@ -0,0 +1,126 @@
+/*
+ * This test ensures that importing/exporting to HTML does not stop
+ * if a malformed uri is found.
+ */
+
+const TEST_FAVICON_PAGE_URL =
+  "http://en-US.www.mozilla.com/en-US/firefox/central/";
+const TEST_FAVICON_DATA_SIZE = 580;
+
+add_task(async function test_corrupt_file() {
+  // Import bookmarks from the corrupt file.
+  let corruptHtml = PathUtils.join(do_get_cwd().path, "bookmarks.corrupt.html");
+  await BookmarkHTMLUtils.importFromFile(corruptHtml, { replace: true });
+
+  // Check that bookmarks that are not corrupt have been imported.
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await database_check();
+});
+
+add_task(async function test_corrupt_database() {
+  // Create corruption in the database, then export.
+  let corruptBookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    url: "http://test.mozilla.org",
+    title: "We love belugas",
+  });
+  await PlacesUtils.withConnectionWrapper("test", async function (db) {
+    await db.execute("UPDATE moz_bookmarks SET fk = NULL WHERE guid = :guid", {
+      guid: corruptBookmark.guid,
+    });
+  });
+
+  let bookmarksFile = PathUtils.join(
+    PathUtils.profileDir,
+    "bookmarks.exported.html"
+  );
+  await IOUtils.remove(bookmarksFile, { ignoreAbsent: true });
+  await BookmarkHTMLUtils.exportToFile(bookmarksFile);
+
+  // Import again and check for correctness.
+  await PlacesUtils.bookmarks.eraseEverything();
+  await BookmarkHTMLUtils.importFromFile(bookmarksFile, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await database_check();
+});
+
+/*
+ * Check for imported bookmarks correctness
+ *
+ * @return {Promise}
+ * @resolves When the checks are finished.
+ * @rejects Never.
+ */
+var database_check = async function () {
+  // BOOKMARKS MENU
+  let root = PlacesUtils.getFolderContents(PlacesUtils.bookmarks.menuGuid).root;
+  Assert.equal(root.childCount, 2);
+
+  let folderNode = root.getChild(1);
+  Assert.equal(folderNode.type, folderNode.RESULT_TYPE_FOLDER);
+  Assert.equal(folderNode.title, "test");
+
+  let bookmark = await PlacesUtils.bookmarks.fetch({
+    guid: folderNode.bookmarkGuid,
+  });
+  Assert.equal(PlacesUtils.toPRTime(bookmark.dateAdded), 1177541020000000);
+  Assert.equal(PlacesUtils.toPRTime(bookmark.lastModified), 1177541050000000);
+
+  // open test folder, and test the children
+  PlacesUtils.asQuery(folderNode);
+  Assert.equal(folderNode.hasChildren, true);
+  folderNode.containerOpen = true;
+  Assert.equal(folderNode.childCount, 1);
+
+  let bookmarkNode = folderNode.getChild(0);
+  Assert.equal("http://test/post", bookmarkNode.uri);
+  Assert.equal("test post keyword", bookmarkNode.title);
+
+  let entry = await PlacesUtils.keywords.fetch({ url: bookmarkNode.uri });
+  Assert.equal("test", entry.keyword);
+  Assert.equal("hidden1%3Dbar&text1%3D%25s", entry.postData);
+
+  Assert.equal(bookmarkNode.dateAdded, 1177375336000000);
+  Assert.equal(bookmarkNode.lastModified, 1177375423000000);
+
+  let pageInfo = await PlacesUtils.history.fetch(bookmarkNode.uri, {
+    includeAnnotations: true,
+  });
+  Assert.equal(
+    pageInfo.annotations.get(PlacesUtils.CHARSET_ANNO),
+    "ISO-8859-1",
+    "Should have the correct charset"
+  );
+
+  // clean up
+  folderNode.containerOpen = false;
+  root.containerOpen = false;
+
+  // BOOKMARKS TOOLBAR
+  root = PlacesUtils.getFolderContents(PlacesUtils.bookmarks.toolbarGuid).root;
+  Assert.equal(root.childCount, 3);
+
+  // cleanup
+  root.containerOpen = false;
+
+  // UNFILED BOOKMARKS
+  root = PlacesUtils.getFolderContents(PlacesUtils.bookmarks.unfiledGuid).root;
+  Assert.equal(root.childCount, 1);
+  root.containerOpen = false;
+
+  // favicons
+  await new Promise(resolve => {
+    PlacesUtils.favicons.getFaviconDataForPage(
+      uri(TEST_FAVICON_PAGE_URL),
+      (aURI, aDataLen, aData, aMimeType) => {
+        // aURI should never be null when aDataLen > 0.
+        Assert.notEqual(aURI, null);
+        // Favicon data is stored in the bookmarks file as a "data:" URI.  For
+        // simplicity, instead of converting the data we receive to a "data:" URI
+        // and comparing it, we just check the data size.
+        Assert.equal(TEST_FAVICON_DATA_SIZE, aDataLen);
+        resolve();
+      }
+    );
+  });
+};
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_html_escape_entities.js b/toolkit/components/places/tests/unit/test_bookmarks_html_escape_entities.js
new file mode 100644
index 0000000000..5349d3948c
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_html_escape_entities.js
@@ -0,0 +1,98 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Checks that html entities are escaped in bookmarks.html files.
+
+add_task(async function () {
+  // Removes bookmarks.html if the file already exists.
+  let HTMLFile = PathUtils.join(PathUtils.profileDir, "bookmarks.html");
+  await IOUtils.remove(HTMLFile, { ignoreAbsent: true });
+
+  let unescaped = '<unescaped="test">';
+  // Adds bookmarks and tags to the database.
+  const url = 'http://www.google.it/"/';
+  let bm = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url,
+    title: unescaped,
+  });
+  await PlacesUtils.keywords.insert({
+    url,
+    keyword: unescaped,
+    postData: unescaped,
+  });
+  PlacesUtils.tagging.tagURI(Services.io.newURI(url), [unescaped]);
+  await PlacesUtils.history.update({
+    url,
+    annotations: new Map([[PlacesUtils.CHARSET_ANNO, unescaped]]),
+  });
+
+  // Exports the bookmarks as a HTML file.
+  await BookmarkHTMLUtils.exportToFile(HTMLFile);
+  await PlacesUtils.bookmarks.remove(bm);
+
+  // Check there are no unescaped entities in the html file.
+  let xml = await new Promise((resolve, reject) => {
+    let xhr = new XMLHttpRequest();
+    xhr.onload = () => {
+      try {
+        resolve(xhr.responseXML);
+      } catch (e) {
+        reject(e);
+      }
+    };
+    xhr.onabort =
+      xhr.onerror =
+      xhr.ontimeout =
+        () => {
+          reject(new Error("xmlhttprequest failed"));
+        };
+    xhr.open("GET", PathUtils.toFileURI(HTMLFile));
+    xhr.responseType = "document";
+    xhr.overrideMimeType("text/html");
+    xhr.send();
+  });
+
+  let checksCount = 5;
+  for (
+    let current = xml;
+    current;
+    current =
+      current.firstChild ||
+      current.nextSibling ||
+      current.parentNode.nextSibling
+  ) {
+    switch (current.nodeType) {
+      case current.ELEMENT_NODE:
+        for (let { name, value } of current.attributes) {
+          info("Found attribute: " + name);
+          // Check tags, keyword, postData and charSet.
+          if (
+            ["tags", "last_charset", "shortcuturl", "post_data"].includes(name)
+          ) {
+            Assert.equal(
+              value,
+              unescaped,
+              `Attribute ${name} should be complete`
+            );
+            checksCount--;
+          }
+        }
+        break;
+      case current.TEXT_NODE:
+        // Check Title.
+        if (!current.data.startsWith("\n") && current.data.includes("test")) {
+          Assert.equal(
+            current.data.trim(),
+            unescaped,
+            "Text node should be complete"
+          );
+          checksCount--;
+        }
+        break;
+    }
+  }
+  Assert.equal(checksCount, 0, "All the checks ran");
+});
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_html_import_tags.js b/toolkit/components/places/tests/unit/test_bookmarks_html_import_tags.js
new file mode 100644
index 0000000000..f01048e1a5
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_html_import_tags.js
@@ -0,0 +1,64 @@
+var bookmarkData = [
+  {
+    uri: uri("http://www.toastytech.com"),
+    title: "Nathan's Toasty Technology Page",
+    tags: ["technology", "personal", "retro"],
+  },
+  {
+    uri: uri("http://www.reddit.com"),
+    title: "reddit: the front page of the internet",
+    tags: ["social media", "news", "humour"],
+  },
+  {
+    uri: uri("http://www.4chan.org"),
+    title: "4chan",
+    tags: ["discussion", "imageboard", "anime"],
+  },
+];
+
+/*
+  TEST SUMMARY
+  - Add bookmarks with tags
+  - Export tagged bookmarks as HTML file
+  - Delete bookmarks
+  - Import bookmarks from HTML file
+  - Check that all bookmarks are successfully imported with tags
+*/
+
+add_task(async function test_import_tags() {
+  // Removes bookmarks.html if the file already exists.
+  let HTMLFile = PathUtils.join(PathUtils.profileDir, "bookmarks.html");
+  await IOUtils.remove(HTMLFile, { ignoreAbsent: true });
+
+  // Adds bookmarks and tags to the database.
+  let bookmarkList = new Set();
+  for (let { uri, title, tags } of bookmarkData) {
+    bookmarkList.add(
+      await PlacesUtils.bookmarks.insert({
+        parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+        url: uri,
+        title,
+      })
+    );
+    PlacesUtils.tagging.tagURI(uri, tags);
+  }
+
+  // Exports the bookmarks as a HTML file.
+  await BookmarkHTMLUtils.exportToFile(HTMLFile);
+
+  // Deletes bookmarks and tags from the database.
+  for (let bookmark of bookmarkList) {
+    await PlacesUtils.bookmarks.remove(bookmark.guid);
+  }
+
+  // Re-imports the bookmarks from the HTML file.
+  await BookmarkHTMLUtils.importFromFile(HTMLFile, { replace: true });
+
+  // Tests to ensure that the tags are still present for each bookmark URI.
+  for (let { uri, tags } of bookmarkData) {
+    info("Test tags for " + uri.spec + ": " + tags + "\n");
+    let foundTags = PlacesUtils.tagging.getTagsForURI(uri);
+    Assert.equal(foundTags.length, tags.length);
+    Assert.ok(tags.every(tag => foundTags.includes(tag)));
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_html_localized.js b/toolkit/components/places/tests/unit/test_bookmarks_html_localized.js
new file mode 100644
index 0000000000..4ef2393efb
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_html_localized.js
@@ -0,0 +1,51 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const { BookmarkHTMLUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/BookmarkHTMLUtils.sys.mjs"
+);
+
+add_task(async function setup_l10n() {
+  // A single localized string.
+  const mockSource = L10nFileSource.createMock(
+    "test",
+    "app",
+    ["en-US"],
+    "/localization/{locale}/",
+    [
+      {
+        path: "/localization/en-US/bookmarks_html_localized.ftl",
+        source: `
+bookmarks-html-localized-folder = Localized Folder
+bookmarks-html-localized-bookmark = Localized Bookmark
+`,
+      },
+    ]
+  );
+
+  L10nRegistry.getInstance().registerSources([mockSource]);
+});
+
+add_task(async function test_bookmarks_html_localized() {
+  let bookmarksFile = PathUtils.join(
+    do_get_cwd().path,
+    "bookmarks_html_localized.html"
+  );
+  await BookmarkHTMLUtils.importFromFile(bookmarksFile, { replace: true });
+
+  let root = PlacesUtils.getFolderContents(PlacesUtils.bookmarks.menuGuid).root;
+  Assert.equal(root.childCount, 1);
+  let folder = root.getChild(0);
+  PlacesUtils.asContainer(folder).containerOpen = true;
+  // Folder title is localized.
+  Assert.equal(folder.title, "Localized Folder");
+  Assert.equal(folder.childCount, 1);
+  let bookmark = folder.getChild(0);
+  Assert.equal(bookmark.uri, "http://www.mozilla.com/firefox/help/");
+  // Bookmark title is localized.
+  Assert.equal(bookmark.title, "Localized Bookmark");
+  folder.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_html_singleframe.js b/toolkit/components/places/tests/unit/test_bookmarks_html_singleframe.js
new file mode 100644
index 0000000000..07131feafe
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_html_singleframe.js
@@ -0,0 +1,31 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Test for bug #801450
+
+// Get Services
+const { BookmarkHTMLUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/BookmarkHTMLUtils.sys.mjs"
+);
+
+add_task(async function test_bookmarks_html_singleframe() {
+  let bookmarksFile = PathUtils.join(
+    do_get_cwd().path,
+    "bookmarks_html_singleframe.html"
+  );
+  await BookmarkHTMLUtils.importFromFile(bookmarksFile, { replace: true });
+
+  let root = PlacesUtils.getFolderContents(PlacesUtils.bookmarks.menuGuid).root;
+  Assert.equal(root.childCount, 1);
+  let folder = root.getChild(0);
+  PlacesUtils.asContainer(folder).containerOpen = true;
+  Assert.equal(folder.title, "Subtitle");
+  Assert.equal(folder.childCount, 1);
+  let bookmark = folder.getChild(0);
+  Assert.equal(bookmark.uri, "http://www.mozilla.org/");
+  Assert.equal(bookmark.title, "Mozilla");
+  folder.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_json.js b/toolkit/components/places/tests/unit/test_bookmarks_json.js
new file mode 100644
index 0000000000..19aaac7f95
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_json.js
@@ -0,0 +1,368 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const { BookmarkJSONUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/BookmarkJSONUtils.sys.mjs"
+);
+
+// An object representing the contents of bookmarks.json.
+var test_bookmarks = {
+  menu: [
+    {
+      guid: "OCyeUO5uu9FF",
+      title: "Mozilla Firefox",
+      children: [
+        {
+          guid: "OCyeUO5uu9FG",
+          title: "Help and Tutorials",
+          url: "http://en-us.www.mozilla.com/en-US/firefox/help/",
+          icon: "data:image/png;base64,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",
+        },
+        {
+          guid: "OCyeUO5uu9FH",
+          title: "Customize Firefox",
+          url: "http://en-us.www.mozilla.com/en-US/firefox/customize/",
+          icon: "data:image/png;base64,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",
+        },
+        {
+          guid: "OCyeUO5uu9FI",
+          title: "Get Involved",
+          url: "http://en-us.www.mozilla.com/en-US/firefox/community/",
+          icon: "data:image/png;base64,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",
+        },
+        {
+          guid: "OCyeUO5uu9FJ",
+          title: "About Us",
+          url: "http://en-us.www.mozilla.com/en-US/about/",
+          icon: "data:image/png;base64,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",
+        },
+        {
+          guid: "QFM-QnE2ZpMz",
+          title: "Test null postData",
+          url: "http://example.com/search?q=%s&suggid=",
+        },
+      ],
+    },
+    {
+      guid: "OCyeUO5uu9FK",
+      type: Ci.nsINavHistoryResultNode.RESULT_TYPE_SEPARATOR,
+    },
+    {
+      guid: "OCyeUO5uu9FL",
+      title: "test",
+      dateAdded: 1177541020000000,
+      lastModified: 1177541050000000,
+      children: [
+        {
+          guid: "OCyeUO5uu9GX",
+          title: "test post keyword",
+          dateAdded: 1177375336000000,
+          lastModified: 1177375423000000,
+          keyword: "test",
+          postData: "hidden1%3Dbar&text1%3D%25s",
+          charset: "ISO-8859-1",
+        },
+      ],
+    },
+  ],
+  toolbar: [
+    {
+      guid: "OCyeUO5uu9FB",
+      title: "Getting Started",
+      url: "http://en-us.www.mozilla.com/en-US/firefox/central/",
+      icon: "data:image/png;base64,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",
+    },
+    {
+      guid: "OCyeUO5uu9FR",
+      title: "Latest Headlines",
+      // This used to be a livemark, but we don't import them anymore, instead
+      // it will be imported as an empty folder, because the json format stores
+      // it like that: an empty folder with a couple annotations. Since
+      // annotations will go away, there won't be a clean way to import it as a
+      // bookmark instead.
+      // Note: date gets truncated to milliseconds, whereas the value in bookmarks.json
+      // has full microseconds.
+      dateAdded: 1361551979451000,
+      lastModified: 1361551979457000,
+    },
+  ],
+  unfiled: [
+    { guid: "OCyeUO5uu9FW", title: "Example.tld", url: "http://example.tld/" },
+    {
+      guid: "Cfkety492Afk",
+      title: "test tagged bookmark",
+      dateAdded: 1507025843703000,
+      lastModified: 1507025844703000,
+      url: "http://example.tld/tagged",
+      tags: ["foo"],
+    },
+    {
+      guid: "lOZGoFR1eXbl",
+      title: "Bookmarks Toolbar Shortcut",
+      dateAdded: 1507025843703000,
+      lastModified: 1507025844703000,
+      url: `place:parent=${PlacesUtils.bookmarks.toolbarGuid}`,
+    },
+    {
+      guid: "7yJWnBVhjRtP",
+      title: "Folder Shortcut",
+      dateAdded: 1507025843703000,
+      lastModified: 1507025844703000,
+      url: `place:parent=OCyeUO5uu9FF`,
+    },
+    {
+      guid: "vm5QXWuWc12l",
+      title: "Folder Shortcut 2",
+      dateAdded: 1507025843703000,
+      lastModified: 1507025844703000,
+      url: "place:invalidOldParentId=6123443&excludeItems=1",
+    },
+    {
+      guid: "Icg1XlIozA1D",
+      title: "Folder Shortcut 3",
+      dateAdded: 1507025843703000,
+      lastModified: 1507025844703000,
+      url: `place:parent=OCyeUO5uu9FF&parent=${PlacesUtils.bookmarks.menuGuid}`,
+    },
+  ],
+};
+
+// Exported bookmarks file pointer.
+var bookmarksExportedFile;
+
+add_task(async function test_import_bookmarks_disallowed_url() {
+  await Assert.rejects(
+    BookmarkJSONUtils.importFromURL("http://example.com/bookmarks.json"),
+    /importFromURL can only be used with/,
+    "Should reject importing from an http based url"
+  );
+  await Assert.rejects(
+    BookmarkJSONUtils.importFromURL("https://example.com/bookmarks.json"),
+    /importFromURL can only be used with/,
+    "Should reject importing from an https based url"
+  );
+});
+
+add_task(async function test_import_bookmarks_count() {
+  // Ensure the bookmarks count is correct when importing in various cases
+  await PlacesUtils.bookmarks.eraseEverything();
+  let bookmarksFile = PathUtils.join(do_get_cwd().path, "bookmarks.json");
+  bookmarksExportedFile = PathUtils.join(
+    PathUtils.profileDir,
+    "bookmarks.exported.json"
+  );
+
+  let count = await BookmarkJSONUtils.importFromFile(bookmarksFile, {
+    replace: true,
+  });
+  Assert.equal(
+    count,
+    13,
+    "There should be 13 imported bookmarks when importing from an empty database"
+  );
+
+  await BookmarkJSONUtils.exportToFile(bookmarksExportedFile);
+  count = -1;
+  count = await BookmarkJSONUtils.importFromFile(bookmarksExportedFile, {
+    replace: true,
+  });
+  Assert.equal(
+    count,
+    13,
+    "There should be 13 imported bookmarks when replacing existing bookmarks"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  count = -1;
+  let bookmarksUrl = PathUtils.toFileURI(bookmarksFile);
+  count = await BookmarkJSONUtils.importFromURL(bookmarksUrl);
+  Assert.equal(
+    count,
+    13,
+    "There should be 13 imported bookmarks when importing from a URL"
+  );
+
+  // Clean up task
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_import_bookmarks() {
+  let bookmarksFile = PathUtils.join(do_get_cwd().path, "bookmarks.json");
+
+  await BookmarkJSONUtils.importFromFile(bookmarksFile, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await testImportedBookmarks();
+});
+
+add_task(async function test_export_bookmarks() {
+  bookmarksExportedFile = PathUtils.join(
+    PathUtils.profileDir,
+    "bookmarks.exported.json"
+  );
+  await BookmarkJSONUtils.exportToFile(bookmarksExportedFile);
+  await PlacesTestUtils.promiseAsyncUpdates();
+});
+
+add_task(async function test_import_exported_bookmarks() {
+  await PlacesUtils.bookmarks.eraseEverything();
+  await BookmarkJSONUtils.importFromFile(bookmarksExportedFile, {
+    replace: true,
+  });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await testImportedBookmarks();
+});
+
+add_task(async function test_import_ontop() {
+  await PlacesUtils.bookmarks.eraseEverything();
+  await BookmarkJSONUtils.importFromFile(bookmarksExportedFile, {
+    replace: true,
+  });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await BookmarkJSONUtils.exportToFile(bookmarksExportedFile);
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await BookmarkJSONUtils.importFromFile(bookmarksExportedFile, {
+    replace: true,
+  });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await testImportedBookmarks();
+});
+
+add_task(async function test_import_iconuri() {
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+
+  let bookmarksFile = PathUtils.join(
+    do_get_cwd().path,
+    "bookmarks_iconuri.json"
+  );
+
+  await BookmarkJSONUtils.importFromFile(bookmarksFile, {
+    replace: true,
+  });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await testImportedBookmarks();
+});
+
+add_task(async function test_export_bookmarks_with_iconuri() {
+  bookmarksExportedFile = PathUtils.join(
+    PathUtils.profileDir,
+    "bookmarks.exported.json"
+  );
+  await BookmarkJSONUtils.exportToFile(bookmarksExportedFile);
+  await PlacesTestUtils.promiseAsyncUpdates();
+});
+
+add_task(async function test_import_exported_bookmarks_with_iconuri() {
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+  await BookmarkJSONUtils.importFromFile(bookmarksExportedFile, {
+    replace: true,
+  });
+  await PlacesTestUtils.promiseAsyncUpdates();
+  await testImportedBookmarks();
+});
+
+add_task(async function test_clean() {
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+async function testImportedBookmarks() {
+  for (let group in test_bookmarks) {
+    info("[testImportedBookmarks()] Checking group '" + group + "'");
+
+    let root = PlacesUtils.getFolderContents(
+      PlacesUtils.bookmarks[`${group}Guid`]
+    ).root;
+
+    let items = test_bookmarks[group];
+    Assert.equal(root.childCount, items.length);
+
+    for (let key in items) {
+      await checkItem(items[key], root.getChild(key));
+    }
+
+    root.containerOpen = false;
+  }
+}
+
+async function checkItem(aExpected, aNode) {
+  let bookmark = await PlacesUtils.bookmarks.fetch(aNode.bookmarkGuid);
+
+  for (let prop in aExpected) {
+    switch (prop) {
+      case "type":
+        Assert.equal(aNode.type, aExpected.type);
+        break;
+      case "title":
+        Assert.equal(aNode.title, aExpected.title);
+        break;
+      case "dateAdded":
+        Assert.equal(
+          PlacesUtils.toPRTime(bookmark.dateAdded),
+          aExpected.dateAdded
+        );
+        break;
+      case "lastModified":
+        Assert.equal(
+          PlacesUtils.toPRTime(bookmark.lastModified),
+          aExpected.lastModified
+        );
+        break;
+      case "url":
+        Assert.equal(aNode.uri, aExpected.url);
+        break;
+      case "icon":
+        let { data } = await getFaviconDataForPage(aExpected.url);
+        let base64Icon =
+          "data:image/png;base64," +
+          base64EncodeString(String.fromCharCode.apply(String, data));
+        Assert.equal(base64Icon, aExpected.icon);
+        break;
+      case "keyword": {
+        let entry = await PlacesUtils.keywords.fetch({ url: aNode.uri });
+        Assert.equal(entry.keyword, aExpected.keyword);
+        break;
+      }
+      case "guid":
+        Assert.equal(bookmark.guid, aExpected.guid);
+        break;
+      case "postData": {
+        let entry = await PlacesUtils.keywords.fetch({ url: aNode.uri });
+        Assert.equal(entry.postData, aExpected.postData);
+        break;
+      }
+      case "charset":
+        let pageInfo = await PlacesUtils.history.fetch(aNode.uri, {
+          includeAnnotations: true,
+        });
+        Assert.equal(
+          pageInfo.annotations.get(PlacesUtils.CHARSET_ANNO),
+          aExpected.charset
+        );
+        break;
+      case "children":
+        let folder = aNode.QueryInterface(Ci.nsINavHistoryContainerResultNode);
+        Assert.equal(folder.hasChildren, !!aExpected.children.length);
+        folder.containerOpen = true;
+        Assert.equal(folder.childCount, aExpected.children.length);
+
+        for (let index = 0; index < aExpected.children.length; index++) {
+          await checkItem(aExpected.children[index], folder.getChild(index));
+        }
+
+        folder.containerOpen = false;
+        break;
+      case "tags":
+        let uri = Services.io.newURI(aNode.uri);
+        Assert.deepEqual(
+          PlacesUtils.tagging.getTagsForURI(uri),
+          aExpected.tags,
+          "should have the expected tags"
+        );
+        break;
+      default:
+        throw new Error("Unknown property");
+    }
+  }
+}
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_json_corrupt.js b/toolkit/components/places/tests/unit/test_bookmarks_json_corrupt.js
new file mode 100644
index 0000000000..b31f1da5bb
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_json_corrupt.js
@@ -0,0 +1,65 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Tests for importing a corrupt json file.
+ *
+ * The corrupt json file attempts to import into:
+ *   - the menu folder:
+ *     - A bookmark with an invalid type.
+ *     - A valid bookmark.
+ *     - A bookmark with an invalid url.
+ *   - the toolbar folder:
+ *     - A bookmark with an invalid url.
+ *
+ * The menu case ensure that we strip out invalid bookmarks, but retain valid
+ * ones.
+ * The toolbar case ensures that if no valid bookmarks remain, then we do not
+ * throw an error.
+ */
+
+const { BookmarkJSONUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/BookmarkJSONUtils.sys.mjs"
+);
+
+add_task(async function test_import_bookmarks() {
+  let bookmarksFile = PathUtils.join(
+    do_get_cwd().path,
+    "bookmarks_corrupt.json"
+  );
+
+  await BookmarkJSONUtils.importFromFile(bookmarksFile, { replace: true });
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  let bookmarks = await PlacesUtils.promiseBookmarksTree(
+    PlacesUtils.bookmarks.menuGuid
+  );
+
+  Assert.equal(
+    bookmarks.children.length,
+    1,
+    "should only be one bookmark in the menu"
+  );
+  let bookmark = bookmarks.children[0];
+  Assert.equal(bookmark.guid, "OCyeUO5uu9FH", "should have correct guid");
+  Assert.equal(
+    bookmark.title,
+    "Customize Firefox",
+    "should have correct title"
+  );
+  Assert.equal(
+    bookmark.uri,
+    "http://en-us.www.mozilla.com/en-US/firefox/customize/",
+    "should have correct uri"
+  );
+
+  bookmarks = await PlacesUtils.promiseBookmarksTree(
+    PlacesUtils.bookmarks.toolbarGuid
+  );
+
+  Assert.ok(
+    !bookmarks.children,
+    "should not have any bookmarks in the toolbar"
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_bookmarks_restore_notification.js b/toolkit/components/places/tests/unit/test_bookmarks_restore_notification.js
new file mode 100644
index 0000000000..892b2d1d04
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_bookmarks_restore_notification.js
@@ -0,0 +1,319 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const { BookmarkHTMLUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/BookmarkHTMLUtils.sys.mjs"
+);
+
+/**
+ * Tests the bookmarks-restore-* nsIObserver notifications after restoring
+ * bookmarks from JSON and HTML.  See bug 470314.
+ */
+
+// The topics and data passed to nsIObserver.observe() on bookmarks restore
+const NSIOBSERVER_TOPIC_BEGIN = "bookmarks-restore-begin";
+const NSIOBSERVER_TOPIC_SUCCESS = "bookmarks-restore-success";
+const NSIOBSERVER_TOPIC_FAILED = "bookmarks-restore-failed";
+const NSIOBSERVER_DATA_JSON = "json";
+const NSIOBSERVER_DATA_HTML = "html";
+const NSIOBSERVER_DATA_HTML_INIT = "html-initial";
+
+// Bookmarks are added for these URIs
+var uris = [
+  "http://example.com/1",
+  "http://example.com/2",
+  "http://example.com/3",
+  "http://example.com/4",
+  "http://example.com/5",
+];
+
+/**
+ * Adds some bookmarks for the URIs in |uris|.
+ */
+async function addBookmarks() {
+  for (let url of uris) {
+    await PlacesUtils.bookmarks.insert({
+      url,
+      parentGuid: PlacesUtils.bookmarks.menuGuid,
+    });
+    Assert.ok(await PlacesUtils.bookmarks.fetch({ url }), "Url is bookmarked");
+  }
+}
+
+/**
+ * Creates an file in the profile directory.
+ *
+ * @param  aBasename
+ *         e.g., "foo.txt" in the path /some/long/path/foo.txt
+ * @return {Promise}
+ * @resolves to an OS.File path
+ */
+async function promiseFile(aBasename) {
+  let path = PathUtils.join(PathUtils.profileDir, aBasename);
+  info("opening " + path);
+
+  await IOUtils.writeUTF8(path, "");
+  return path;
+}
+
+/**
+ * Register observers via promiseTopicObserved helper.
+ *
+ * @param  {boolean} expectSuccess pass true when expect a success notification
+ * @return {Promise[]}
+ */
+function registerObservers(expectSuccess) {
+  let promiseBegin = promiseTopicObserved(NSIOBSERVER_TOPIC_BEGIN);
+  let promiseResult;
+  if (expectSuccess) {
+    promiseResult = promiseTopicObserved(NSIOBSERVER_TOPIC_SUCCESS);
+  } else {
+    promiseResult = promiseTopicObserved(NSIOBSERVER_TOPIC_FAILED);
+  }
+
+  return [promiseBegin, promiseResult];
+}
+
+/**
+ * Check notification results.
+ *
+ * @param  {Promise[]} expectPromises array contain promiseBegin and promiseResult
+ * @param  {object} expectedData contain data and folderId
+ */
+async function checkObservers(expectPromises, expectedData) {
+  let [promiseBegin, promiseResult] = expectPromises;
+
+  let beginData = (await promiseBegin)[1];
+  Assert.equal(
+    beginData,
+    expectedData.data,
+    "Data for current test should be what is expected"
+  );
+
+  let [resultSubject, resultData] = await promiseResult;
+  Assert.equal(
+    resultData,
+    expectedData.data,
+    "Data for current test should be what is expected"
+  );
+
+  // Make sure folder ID is what is expected.  For importing HTML into a
+  // folder, this will be an integer, otherwise null.
+  if (resultSubject) {
+    Assert.equal(
+      resultSubject.QueryInterface(Ci.nsISupportsPRInt64).data,
+      expectedData.folderId
+    );
+  } else {
+    Assert.equal(expectedData.folderId, null);
+  }
+}
+
+/**
+ * Run after every test cases.
+ */
+async function teardown(file, begin, success, fail) {
+  // On restore failed, file may not exist, so wrap in try-catch.
+  await IOUtils.remove(file, { ignoreAbsent: true });
+
+  // clean up bookmarks
+  await PlacesUtils.bookmarks.eraseEverything();
+}
+
+add_task(async function test_json_restore_normal() {
+  // data: the data passed to nsIObserver.observe() corresponding to the test
+  // folderId: for HTML restore into a folder, the folder ID to restore into;
+  //           otherwise, set it to null
+  let expectedData = {
+    data: NSIOBSERVER_DATA_JSON,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(true);
+
+  info("JSON restore: normal restore should succeed");
+  let file = await promiseFile("bookmarks-test_restoreNotification.json");
+  await addBookmarks();
+
+  await BookmarkJSONUtils.exportToFile(file);
+  await PlacesUtils.bookmarks.eraseEverything();
+  try {
+    await BookmarkJSONUtils.importFromFile(file, { replace: true });
+  } catch (e) {
+    do_throw("  Restore should not have failed " + e);
+  }
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file);
+});
+
+add_task(async function test_json_restore_empty() {
+  let expectedData = {
+    data: NSIOBSERVER_DATA_JSON,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(false);
+
+  info("JSON restore: empty file should fail");
+  let file = await promiseFile("bookmarks-test_restoreNotification.json");
+  await Assert.rejects(
+    BookmarkJSONUtils.importFromFile(file, { replace: true }),
+    /SyntaxError/,
+    "Restore should reject for an empty file."
+  );
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file);
+});
+
+add_task(async function test_json_restore_nonexist() {
+  let expectedData = {
+    data: NSIOBSERVER_DATA_JSON,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(false);
+
+  info("JSON restore: nonexistent file should fail");
+  let file = Services.dirsvc.get("ProfD", Ci.nsIFile);
+  file.append("this file doesn't exist because nobody created it 1");
+  await Assert.rejects(
+    BookmarkJSONUtils.importFromFile(file.path, { replace: true }),
+    /Cannot restore from nonexisting json file/,
+    "Restore should reject for a non-existent file."
+  );
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file.path);
+});
+
+add_task(async function test_html_restore_normal() {
+  let expectedData = {
+    data: NSIOBSERVER_DATA_HTML,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(true);
+
+  info("HTML restore: normal restore should succeed");
+  let file = await promiseFile("bookmarks-test_restoreNotification.html");
+  await addBookmarks();
+  await BookmarkHTMLUtils.exportToFile(file);
+  await PlacesUtils.bookmarks.eraseEverything();
+  try {
+    BookmarkHTMLUtils.importFromFile(file).catch(
+      do_report_unexpected_exception
+    );
+  } catch (e) {
+    do_throw("  Restore should not have failed");
+  }
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file);
+});
+
+add_task(async function test_html_restore_empty() {
+  let expectedData = {
+    data: NSIOBSERVER_DATA_HTML,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(true);
+
+  info("HTML restore: empty file should succeed");
+  let file = await promiseFile("bookmarks-test_restoreNotification.init.html");
+  try {
+    BookmarkHTMLUtils.importFromFile(file).catch(
+      do_report_unexpected_exception
+    );
+  } catch (e) {
+    do_throw("  Restore should not have failed");
+  }
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file);
+});
+
+add_task(async function test_html_restore_nonexist() {
+  let expectedData = {
+    data: NSIOBSERVER_DATA_HTML,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(false);
+
+  info("HTML restore: nonexistent file should fail");
+  let file = Services.dirsvc.get("ProfD", Ci.nsIFile);
+  file.append("this file doesn't exist because nobody created it 2");
+  await Assert.rejects(
+    BookmarkHTMLUtils.importFromFile(file.path),
+    /Cannot import from nonexisting html file/,
+    "Restore should reject for a non-existent file."
+  );
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file.path);
+});
+
+add_task(async function test_html_init_restore_normal() {
+  let expectedData = {
+    data: NSIOBSERVER_DATA_HTML_INIT,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(true);
+
+  info("HTML initial restore: normal restore should succeed");
+  let file = await promiseFile("bookmarks-test_restoreNotification.init.html");
+  await addBookmarks();
+  await BookmarkHTMLUtils.exportToFile(file);
+  await PlacesUtils.bookmarks.eraseEverything();
+  try {
+    BookmarkHTMLUtils.importFromFile(file, { replace: true }).catch(
+      do_report_unexpected_exception
+    );
+  } catch (e) {
+    do_throw("  Restore should not have failed");
+  }
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file);
+});
+
+add_task(async function test_html_init_restore_empty() {
+  let expectedData = {
+    data: NSIOBSERVER_DATA_HTML_INIT,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(true);
+
+  info("HTML initial restore: empty file should succeed");
+  let file = await promiseFile("bookmarks-test_restoreNotification.init.html");
+  try {
+    BookmarkHTMLUtils.importFromFile(file, { replace: true }).catch(
+      do_report_unexpected_exception
+    );
+  } catch (e) {
+    do_throw("  Restore should not have failed");
+  }
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file);
+});
+
+add_task(async function test_html_init_restore_nonexist() {
+  let expectedData = {
+    data: NSIOBSERVER_DATA_HTML_INIT,
+    folderId: null,
+  };
+  let expectPromises = registerObservers(false);
+
+  info("HTML initial restore: nonexistent file should fail");
+  let file = Services.dirsvc.get("ProfD", Ci.nsIFile);
+  file.append("this file doesn't exist because nobody created it 3");
+  await Assert.rejects(
+    BookmarkHTMLUtils.importFromFile(file.path, { replace: true }),
+    /Cannot import from nonexisting html file/,
+    "Restore should reject for a non-existent file."
+  );
+
+  await checkObservers(expectPromises, expectedData);
+  await teardown(file.path);
+});
diff --git a/toolkit/components/places/tests/unit/test_broken_folderShortcut_result.js b/toolkit/components/places/tests/unit/test_broken_folderShortcut_result.js
new file mode 100644
index 0000000000..1e1f7bc9c7
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_broken_folderShortcut_result.js
@@ -0,0 +1,78 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+add_task(async function test_brokenFolderShortcut() {
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.unfiledGuid,
+    children: [
+      {
+        url: "http://1.moz.org/",
+        title: "Bookmark 1",
+      },
+      {
+        url: "place:parent=1234",
+        title: "Shortcut 1",
+      },
+      {
+        url: "place:parent=-1",
+        title: "Shortcut 2",
+      },
+      {
+        url: "http://2.moz.org/",
+        title: "Bookmark 2",
+      },
+    ],
+  });
+
+  // Add also a simple visit.
+  await PlacesTestUtils.addVisits(uri("http://3.moz.org/"));
+
+  // Query containing a broken folder shortcuts among results.
+  let query = PlacesUtils.history.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.unfiledGuid]);
+  let options = PlacesUtils.history.getNewQueryOptions();
+  let root = PlacesUtils.history.executeQuery(query, options).root;
+  root.containerOpen = true;
+
+  Assert.equal(root.childCount, 4);
+
+  let shortcut = root.getChild(1);
+  Assert.equal(shortcut.uri, "place:parent=1234");
+  PlacesUtils.asContainer(shortcut);
+  shortcut.containerOpen = true;
+  Assert.equal(shortcut.childCount, 0);
+  shortcut.containerOpen = false;
+  // Remove the broken shortcut while the containing result is open.
+  await PlacesUtils.bookmarks.remove(bookmarks[1]);
+  Assert.equal(root.childCount, 3);
+
+  shortcut = root.getChild(1);
+  Assert.equal(shortcut.uri, "place:parent=-1");
+  PlacesUtils.asContainer(shortcut);
+  shortcut.containerOpen = true;
+  Assert.equal(shortcut.childCount, 0);
+  shortcut.containerOpen = false;
+  // Remove the broken shortcut while the containing result is open.
+  await PlacesUtils.bookmarks.remove(bookmarks[2]);
+  Assert.equal(root.childCount, 2);
+
+  root.containerOpen = false;
+
+  // Broken folder shortcut as root node.
+  query = PlacesUtils.history.getNewQuery();
+  query.setParents([1234]);
+  options = PlacesUtils.history.getNewQueryOptions();
+  root = PlacesUtils.history.executeQuery(query, options).root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 0);
+  root.containerOpen = false;
+
+  // Broken folder shortcut as root node with folder=-1.
+  query = PlacesUtils.history.getNewQuery();
+  query.setParents([-1]);
+  options = PlacesUtils.history.getNewQueryOptions();
+  root = PlacesUtils.history.executeQuery(query, options).root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 0);
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_browserhistory.js b/toolkit/components/places/tests/unit/test_browserhistory.js
new file mode 100644
index 0000000000..f737262ae7
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_browserhistory.js
@@ -0,0 +1,122 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const TEST_URI = "http://mozilla.com/";
+const TEST_SUBDOMAIN_URI = "http://foobar.mozilla.com/";
+
+async function checkEmptyHistory() {
+  let db = await PlacesUtils.promiseDBConnection();
+  let rows = await db.executeCached("SELECT count(*) FROM moz_historyvisits");
+  return !rows[0].getResultByIndex(0);
+}
+
+add_task(async function test_addPage() {
+  await PlacesTestUtils.addVisits(TEST_URI);
+  Assert.ok(!(await checkEmptyHistory()), "History has entries");
+});
+
+add_task(async function test_removePage() {
+  await PlacesUtils.history.remove(TEST_URI);
+  Assert.ok(await checkEmptyHistory(), "History is empty");
+});
+
+add_task(async function test_removePages() {
+  let pages = [];
+  for (let i = 0; i < 8; i++) {
+    pages.push(TEST_URI + i);
+  }
+
+  await PlacesTestUtils.addVisits(pages.map(uri => ({ uri })));
+  // Bookmarked item should not be removed from moz_places.
+  const ANNO_INDEX = 1;
+  const ANNO_NAME = "testAnno";
+  const ANNO_VALUE = "foo";
+  const BOOKMARK_INDEX = 2;
+  await PlacesUtils.history.update({
+    url: pages[ANNO_INDEX],
+    annotations: new Map([[ANNO_NAME, ANNO_VALUE]]),
+  });
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: pages[BOOKMARK_INDEX],
+    title: "test bookmark",
+  });
+  await PlacesUtils.history.update({
+    url: pages[BOOKMARK_INDEX],
+    annotations: new Map([[ANNO_NAME, ANNO_VALUE]]),
+  });
+
+  await PlacesUtils.history.remove(pages);
+  Assert.ok(await checkEmptyHistory(), "History is empty");
+
+  // Check that the bookmark and its annotation still exist.
+  let folder = await PlacesUtils.getFolderContents(
+    PlacesUtils.bookmarks.unfiledGuid
+  );
+  Assert.equal(folder.root.childCount, 1);
+  let pageInfo = await PlacesUtils.history.fetch(pages[BOOKMARK_INDEX], {
+    includeAnnotations: true,
+  });
+  Assert.equal(pageInfo.annotations.get(ANNO_NAME), ANNO_VALUE);
+
+  // Check the annotation on the non-bookmarked page does not exist anymore.
+  await assertNoOrphanPageAnnotations();
+
+  // Cleanup.
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function test_removePagesByTimeframe() {
+  let visits = [];
+  let startDate = (Date.now() - 10000) * 1000;
+  for (let i = 0; i < 10; i++) {
+    visits.push({
+      uri: TEST_URI + i,
+      visitDate: startDate + i * 1000,
+    });
+  }
+
+  await PlacesTestUtils.addVisits(visits);
+
+  // Delete all pages except the first and the last.
+  await PlacesUtils.history.removeByFilter({
+    beginDate: PlacesUtils.toDate(startDate + 1000),
+    endDate: PlacesUtils.toDate(startDate + 8000),
+  });
+
+  // Check that we have removed the correct pages.
+  for (let i = 0; i < 10; i++) {
+    Assert.equal(page_in_database(TEST_URI + i) == 0, i > 0 && i < 9);
+  }
+
+  // Clear remaining items and check that all pages have been removed.
+  await PlacesUtils.history.removeByFilter({
+    beginDate: PlacesUtils.toDate(startDate),
+    endDate: PlacesUtils.toDate(startDate + 9000),
+  });
+  Assert.ok(await checkEmptyHistory(), "History is empty");
+});
+
+add_task(async function test_removePagesFromHost() {
+  await PlacesTestUtils.addVisits(TEST_URI);
+  await PlacesUtils.history.removeByFilter({ host: ".mozilla.com" });
+  Assert.ok(await checkEmptyHistory(), "History is empty");
+});
+
+add_task(async function test_removePagesFromHost_keepSubdomains() {
+  await PlacesTestUtils.addVisits([
+    { uri: TEST_URI },
+    { uri: TEST_SUBDOMAIN_URI },
+  ]);
+  await PlacesUtils.history.removeByFilter({ host: "mozilla.com" });
+  Assert.ok(!(await checkEmptyHistory()), "History has entries");
+});
+
+add_task(async function test_history_clear() {
+  await PlacesUtils.history.clear();
+  Assert.ok(await checkEmptyHistory(), "History is empty");
+});
diff --git a/toolkit/components/places/tests/unit/test_childlessTags.js b/toolkit/components/places/tests/unit/test_childlessTags.js
new file mode 100644
index 0000000000..9f489a266b
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_childlessTags.js
@@ -0,0 +1,140 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Ensures that removal of a bookmark untags the bookmark if it's no longer
+ * contained in any regular, non-tag folders.  See bug 444849.
+ */
+
+var histsvc = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+  Ci.nsINavHistoryService
+);
+
+var tagssvc = Cc["@mozilla.org/browser/tagging-service;1"].getService(
+  Ci.nsITaggingService
+);
+
+const BOOKMARK_URI = uri("http://example.com/");
+
+add_task(async function test_removing_tagged_bookmark_removes_tag() {
+  print("  Make a bookmark.");
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: BOOKMARK_URI,
+    title: "test bookmark",
+  });
+
+  print("  Tag it up.");
+  let tags = ["foo", "bar"];
+  tagssvc.tagURI(BOOKMARK_URI, tags);
+  ensureTagsExist(tags);
+  let root = getTagRoot();
+  root.containerOpen = true;
+  let oldCount = root.childCount;
+  root.containerOpen = false;
+
+  print("  Remove the bookmark.  The tags should no longer exist.");
+  let wait = TestUtils.waitForCondition(() => {
+    root = getTagRoot();
+    root.containerOpen = true;
+    let val = root.childCount == oldCount - 2;
+    root.containerOpen = false;
+    return val;
+  });
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+  await wait;
+  ensureTagsExist([]);
+});
+
+add_task(
+  async function test_removing_folder_containing_tagged_bookmark_removes_tag() {
+    print("  Make a folder.");
+    let folder = await PlacesUtils.bookmarks.insert({
+      parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+      title: "test folder",
+      type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    });
+
+    print("  Stick a bookmark in the folder.");
+    var bookmark = await PlacesUtils.bookmarks.insert({
+      parentGuid: folder.guid,
+      url: BOOKMARK_URI,
+      title: "test bookmark",
+    });
+
+    print("  Tag the bookmark.");
+    var tags = ["foo", "bar"];
+    tagssvc.tagURI(BOOKMARK_URI, tags);
+    ensureTagsExist(tags);
+
+    // The tag containers are removed in async and take some time
+    let oldCountFoo = await tagCount("foo");
+    let oldCountBar = await tagCount("bar");
+
+    print("  Remove the folder.  The tags should no longer exist.");
+
+    let wait = TestUtils.waitForCondition(async () => {
+      let newCountFoo = await tagCount("foo");
+      let newCountBar = await tagCount("bar");
+      return newCountFoo == oldCountFoo - 1 && newCountBar == oldCountBar - 1;
+    });
+    await PlacesUtils.bookmarks.remove(bookmark.guid);
+    await wait;
+    ensureTagsExist([]);
+  }
+);
+
+async function tagCount(aTag) {
+  let allTags = await PlacesUtils.bookmarks.fetchTags();
+  for (let i of allTags) {
+    if (i.name == aTag) {
+      return i.count;
+    }
+  }
+  return 0;
+}
+
+function getTagRoot() {
+  var query = histsvc.getNewQuery();
+  var opts = histsvc.getNewQueryOptions();
+  opts.resultType = opts.RESULTS_AS_TAGS_ROOT;
+  var resultRoot = histsvc.executeQuery(query, opts).root;
+  return resultRoot;
+}
+/**
+ * Runs a tag query and ensures that the tags returned are those and only those
+ * in aTags.  aTags may be empty, in which case this function ensures that no
+ * tags exist.
+ *
+ * @param aTags
+ *        An array of tags (strings)
+ */
+function ensureTagsExist(aTags) {
+  var query = histsvc.getNewQuery();
+  var opts = histsvc.getNewQueryOptions();
+  opts.resultType = opts.RESULTS_AS_TAGS_ROOT;
+  var resultRoot = histsvc.executeQuery(query, opts).root;
+
+  // Dupe aTags.
+  var tags = aTags.slice(0);
+
+  resultRoot.containerOpen = true;
+
+  // Ensure that the number of tags returned from the query is the same as the
+  // number in |tags|.
+  Assert.equal(resultRoot.childCount, tags.length);
+
+  // For each tag result from the query, ensure that it's contained in |tags|.
+  // Remove the tag from |tags| so that we ensure the sets are equal.
+  for (let i = 0; i < resultRoot.childCount; i++) {
+    var tag = resultRoot.getChild(i).title;
+    var indexOfTag = tags.indexOf(tag);
+    Assert.ok(indexOfTag >= 0);
+    tags.splice(indexOfTag, 1);
+  }
+
+  resultRoot.containerOpen = false;
+}
diff --git a/toolkit/components/places/tests/unit/test_frecency_decay.js b/toolkit/components/places/tests/unit/test_frecency_decay.js
new file mode 100644
index 0000000000..8fbb08aecc
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_decay.js
@@ -0,0 +1,82 @@
+/* Any copyright is dedicated to the Public Domain.
+ * https://creativecommons.org/publicdomain/zero/1.0/ */
+
+const PREF_FREC_DECAY_RATE_DEF = 0.975;
+
+/**
+ * Promises that the pages-rank-changed event has been seen.
+ *
+ * @returns {Promise} A promise which is resolved when the notification is seen.
+ */
+function promiseRankingChanged() {
+  return PlacesTestUtils.waitForNotification("pages-rank-changed");
+}
+
+add_task(async function setup() {
+  Services.prefs.setCharPref(
+    "places.frecency.decayRate",
+    PREF_FREC_DECAY_RATE_DEF
+  );
+});
+
+add_task(async function test_isFrecencyDecaying() {
+  let db = await PlacesUtils.promiseDBConnection();
+  async function queryFrecencyDecaying() {
+    return (
+      await db.executeCached(`SELECT is_frecency_decaying()`)
+    )[0].getResultByIndex(0);
+  }
+  PlacesUtils.history.isFrecencyDecaying = true;
+  Assert.equal(PlacesUtils.history.isFrecencyDecaying, true);
+  Assert.equal(await queryFrecencyDecaying(), true);
+  PlacesUtils.history.isFrecencyDecaying = false;
+  Assert.equal(PlacesUtils.history.isFrecencyDecaying, false);
+  Assert.equal(await queryFrecencyDecaying(), false);
+});
+
+add_task(async function test_frecency_decay() {
+  let unvisitedBookmarkFrecency = Services.prefs.getIntPref(
+    "places.frecency.unvisitedBookmarkBonus"
+  );
+
+  // Add a bookmark and check its frecency.
+  let url = "http://example.com/b";
+  let promiseOne = promiseRankingChanged();
+  await PlacesUtils.bookmarks.insert({
+    url,
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  await promiseOne;
+
+  let histogram = TelemetryTestUtils.getAndClearHistogram(
+    "PLACES_IDLE_FRECENCY_DECAY_TIME_MS"
+  );
+  info("Trigger frecency decay.");
+  Assert.equal(PlacesUtils.history.isFrecencyDecaying, false);
+  let promiseRanking = promiseRankingChanged();
+
+  PlacesFrecencyRecalculator.observe(null, "idle-daily", "");
+  Assert.equal(PlacesUtils.history.isFrecencyDecaying, true);
+  info("Wait for completion.");
+  await PlacesFrecencyRecalculator.pendingFrecencyDecayPromise;
+
+  await promiseRanking;
+  Assert.equal(PlacesUtils.history.isFrecencyDecaying, false);
+
+  // Now check the new frecency is correct.
+  let newFrecency = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "frecency",
+    { url }
+  );
+
+  Assert.equal(
+    newFrecency,
+    Math.round(unvisitedBookmarkFrecency * PREF_FREC_DECAY_RATE_DEF),
+    "Frecencies should match"
+  );
+
+  let snapshot = histogram.snapshot();
+  Assert.greater(snapshot.sum, 0);
+});
diff --git a/toolkit/components/places/tests/unit/test_frecency_observers.js b/toolkit/components/places/tests/unit/test_frecency_observers.js
new file mode 100644
index 0000000000..44747b06f9
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_observers.js
@@ -0,0 +1,99 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Each of these tests a path that triggers a frecency update.  Together they
+// hit all sites that update a frecency.
+
+// InsertVisitedURIs::UpdateFrecency and History::InsertPlace
+add_task(
+  async function test_InsertVisitedURIs_UpdateFrecency_and_History_InsertPlace() {
+    // InsertPlace is at the end of a path that UpdateFrecency is also on, so kill
+    // two birds with one stone and expect two notifications.  Trigger the path by
+    // adding a download.
+    let url = Services.io.newURI("http://example.com/a");
+    let promise = onRankingChanged();
+    await PlacesUtils.history.insert({
+      url,
+      visits: [
+        {
+          transition: PlacesUtils.history.TRANSITIONS.DOWNLOAD,
+        },
+      ],
+    });
+    await promise;
+  }
+);
+
+// nsNavHistory::UpdateFrecency
+add_task(async function test_nsNavHistory_UpdateFrecency() {
+  let url = Services.io.newURI("http://example.com/b");
+  let promise = onRankingChanged();
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url,
+    title: "test",
+  });
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  await promise;
+});
+
+// History.jsm invalidateFrecencies()
+add_task(async function test_invalidateFrecencies() {
+  let url = Services.io.newURI("http://test-invalidateFrecencies.com/");
+  // Bookmarking the URI is enough to add it to moz_places, and importantly, it
+  // means that removeByFilter doesn't remove it from moz_places, so its
+  // frecency is able to be changed.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url,
+    title: "test",
+  });
+  let promise = onRankingChanged();
+  await PlacesUtils.history.removeByFilter({ host: url.host });
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  await promise;
+});
+
+// History.jsm clear() should not cause a frecency recalculation since pages
+// are removed.
+add_task(async function test_clear() {
+  let received = [];
+  let listener = events =>
+    (received = received.concat(events.map(e => e.type)));
+  PlacesObservers.addListener(
+    ["history-cleared", "pages-rank-changed"],
+    listener
+  );
+  await PlacesUtils.history.clear();
+  PlacesObservers.removeListener(
+    ["history-cleared", "pages-rank-changed"],
+    listener
+  );
+  Assert.deepEqual(received, ["history-cleared"]);
+});
+
+add_task(async function test_nsNavHistory_idleDaily() {
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "https://test-site1.org",
+    title: "test",
+  });
+  PlacesFrecencyRecalculator.observe(null, "idle-daily", "");
+  await Promise.all([onRankingChanged()]);
+});
+
+add_task(async function test_nsNavHistory_recalculate() {
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "https://test-site1.org",
+    title: "test",
+  });
+  await Promise.all([
+    onRankingChanged(),
+    PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies(),
+  ]);
+});
+
+function onRankingChanged() {
+  return PlacesTestUtils.waitForNotification("pages-rank-changed");
+}
diff --git a/toolkit/components/places/tests/unit/test_frecency_origins_alternative.js b/toolkit/components/places/tests/unit/test_frecency_origins_alternative.js
new file mode 100644
index 0000000000..5519149cac
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_origins_alternative.js
@@ -0,0 +1,301 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests alternative origins frecency.
+// Note: the order of the tests here matters, since we are emulating subsquent
+// starts of the recalculator component with different initial conditions.
+
+const FEATURE_PREF = "places.frecency.origins.alternative.featureGate";
+
+async function restartRecalculator() {
+  let subject = {};
+  PlacesFrecencyRecalculator.observe(
+    subject,
+    "test-alternative-frecency-init",
+    ""
+  );
+  await subject.promise;
+}
+
+async function getAllOrigins() {
+  let db = await PlacesUtils.promiseDBConnection();
+  let rows = await db.execute(`SELECT * FROM moz_origins`);
+  Assert.greater(rows.length, 0);
+  return rows.map(r => ({
+    host: r.getResultByName("host"),
+    frecency: r.getResultByName("frecency"),
+    recalc_frecency: r.getResultByName("recalc_frecency"),
+    alt_frecency: r.getResultByName("alt_frecency"),
+    recalc_alt_frecency: r.getResultByName("recalc_alt_frecency"),
+  }));
+}
+
+add_setup(async function () {
+  await PlacesTestUtils.addVisits([
+    "https://testdomain1.moz.org",
+    "https://testdomain2.moz.org",
+    "https://testdomain3.moz.org",
+  ]);
+  registerCleanupFunction(PlacesUtils.history.clear);
+});
+
+add_task(async function test_normal_init() {
+  // Ensure moz_meta doesn't report anything.
+  Assert.ok(
+    !PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.enabled,
+    "Check the pref is disabled by default"
+  );
+  // Avoid hitting the cache, we want to check the actual database value.
+  PlacesUtils.metadata.cache.clear();
+  Assert.ok(
+    ObjectUtils.isEmpty(
+      await PlacesUtils.metadata.get(
+        PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.metadataKey,
+        Object.create(null)
+      )
+    ),
+    "Check there's no variables stored"
+  );
+});
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, true]],
+  },
+  async function test_enable_init() {
+    // Set alt_frecency to NULL and recalc_alt_frecency = 0 for the entries in
+    // moz_origins to verify they are recalculated.
+    await PlacesTestUtils.updateDatabaseValues("moz_origins", {
+      alt_frecency: null,
+      recalc_alt_frecency: 0,
+    });
+
+    await restartRecalculator();
+
+    // Ensure moz_meta doesn't report anything.
+    Assert.ok(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.enabled,
+      "Check the pref is enabled"
+    );
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.equal(
+      (
+        await PlacesUtils.metadata.get(
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins
+            .metadataKey,
+          Object.create(null)
+        )
+      ).version,
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.variables
+        .version,
+      "Check the algorithm version has been stored"
+    );
+
+    // Check all alternative frecencies have been calculated, since we just have
+    // a few.
+    let origins = await getAllOrigins();
+    Assert.ok(
+      origins.every(o => o.recalc_alt_frecency == 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      origins.every(o => o.alt_frecency > 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      PlacesFrecencyRecalculator.isRecalculationPending,
+      "Recalculation should be pending"
+    );
+  }
+);
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, true]],
+  },
+  async function test_different_version() {
+    let origins = await getAllOrigins();
+    Assert.ok(
+      origins.every(o => o.recalc_alt_frecency == 0),
+      "All the entries should not need recalculation"
+    );
+
+    // Set alt_frecency to NULL for the entries in moz_origins to verify they
+    // are recalculated.
+    await PlacesTestUtils.updateDatabaseValues("moz_origins", {
+      alt_frecency: null,
+    });
+
+    // It doesn't matter that the version is, it just have to be different.
+    let variables = await PlacesUtils.metadata.get(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.metadataKey,
+      Object.create(null)
+    );
+    variables.version = 999;
+    await PlacesUtils.metadata.set(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.metadataKey,
+      variables
+    );
+
+    await restartRecalculator();
+
+    // Check alternative frecency has been marked for recalculation.
+    // Note just after init we reculate a chunk, and this test code is expected
+    // to run before that... though we can't be sure, so if this starts failing
+    // intermittently we'll have to add more synchronization test code.
+    origins = await getAllOrigins();
+    // Ensure moz_meta has been updated.
+    Assert.ok(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.enabled,
+      "Check the pref is enabled"
+    );
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.deepEqual(
+      (
+        await PlacesUtils.metadata.get(
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins
+            .metadataKey,
+          Object.create(null)
+        )
+      ).version,
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.variables
+        .version,
+      "Check the algorithm version has been stored"
+    );
+
+    // Check all alternative frecencies have been calculated, since we just have
+    // a few.
+    origins = await getAllOrigins();
+    Assert.ok(
+      origins.every(o => o.recalc_alt_frecency == 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      origins.every(o => o.alt_frecency > 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      PlacesFrecencyRecalculator.isRecalculationPending,
+      "Recalculation should be pending"
+    );
+  }
+);
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, true]],
+  },
+  async function test_different_variables() {
+    let origins = await getAllOrigins();
+    Assert.ok(
+      origins.every(o => o.recalc_alt_frecency == 0),
+      "All the entries should not need recalculation"
+    );
+
+    // Set alt_frecency to NULL for the entries in moz_origins to verify they
+    // are recalculated.
+    await PlacesTestUtils.updateDatabaseValues("moz_origins", {
+      alt_frecency: null,
+    });
+
+    // Change variables.
+    let variables = await PlacesUtils.metadata.get(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.metadataKey,
+      Object.create(null)
+    );
+    Assert.greater(Object.keys(variables).length, 1);
+    Assert.ok("version" in variables, "At least the version is always present");
+    await PlacesUtils.metadata.set(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.metadataKey,
+      {
+        version:
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.variables
+            .version,
+        someVar: 1,
+      }
+    );
+
+    await restartRecalculator();
+
+    // Ensure moz_meta has been updated.
+    Assert.ok(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.enabled,
+      "Check the pref is enabled"
+    );
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.deepEqual(
+      await PlacesUtils.metadata.get(
+        PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.metadataKey,
+        Object.create(null)
+      ),
+      variables,
+      "Check the algorithm variables have been stored"
+    );
+
+    // Check all alternative frecencies have been calculated, since we just have
+    // a few.
+    origins = await getAllOrigins();
+    Assert.ok(
+      origins.every(o => o.recalc_alt_frecency == 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      origins.every(o => o.alt_frecency > 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      PlacesFrecencyRecalculator.isRecalculationPending,
+      "Recalculation should be pending"
+    );
+  }
+);
+
+add_task(async function test_disable() {
+  let origins = await getAllOrigins();
+  Assert.ok(
+    origins.every(o => o.recalc_alt_frecency == 0),
+    "All the entries should not need recalculation"
+  );
+  // Avoid hitting the cache, we want to check the actual database value.
+  PlacesUtils.metadata.cache.clear();
+  Assert.equal(
+    (
+      await PlacesUtils.metadata.get(
+        PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.metadataKey,
+        Object.create(null)
+      )
+    ).version,
+    PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.variables
+      .version,
+    "Check the algorithm version has been stored"
+  );
+
+  await restartRecalculator();
+
+  // Check alternative frecency has not been marked for recalculation.
+  origins = await getAllOrigins();
+  Assert.ok(
+    origins.every(o => o.recalc_alt_frecency == 0),
+    "The entries not have been marked for recalc"
+  );
+  Assert.ok(
+    origins.every(o => o.alt_frecency === null),
+    "All the alt_frecency values should have been nullified"
+  );
+
+  // Ensure moz_meta has been updated.
+  // Avoid hitting the cache, we want to check the actual database value.
+  PlacesUtils.metadata.cache.clear();
+  Assert.ok(
+    ObjectUtils.isEmpty(
+      await PlacesUtils.metadata.get(
+        PlacesFrecencyRecalculator.alternativeFrecencyInfo.origins.metadataKey,
+        Object.create(null)
+      )
+    ),
+    "Check the algorithm variables has been removed"
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_frecency_origins_recalc.js b/toolkit/components/places/tests/unit/test_frecency_origins_recalc.js
new file mode 100644
index 0000000000..3a93912f13
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_origins_recalc.js
@@ -0,0 +1,109 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that recalc_frecency in the moz_origins table works is consistent.
+
+add_task(async function test() {
+  // test recalc_frecency is set to 1 when frecency of a page changes.
+  // Add a couple visits, then remove one of them.
+  const now = new Date();
+  const host = "mozilla.org";
+  const url = `https://${host}/test/`;
+  await PlacesTestUtils.addVisits([
+    {
+      url,
+      visitDate: now,
+    },
+    {
+      url,
+      visitDate: new Date(new Date().setDate(now.getDate() - 30)),
+    },
+  ]);
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_origins", "recalc_frecency", {
+      host,
+    }),
+    1,
+    "Frecency should be calculated"
+  );
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue(
+      "moz_origins",
+      "recalc_alt_frecency",
+      {
+        host,
+      }
+    ),
+    1,
+    "Alt frecency should be calculated"
+  );
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  let alt_frecency = await PlacesTestUtils.getDatabaseValue(
+    "moz_origins",
+    "alt_frecency",
+    { host }
+  );
+  let frecency = await PlacesTestUtils.getDatabaseValue(
+    "moz_origins",
+    "frecency",
+    { host }
+  );
+  // Remove only one visit (otherwise the page would be orphaned).
+  await PlacesUtils.history.removeVisitsByFilter({
+    beginDate: new Date(now.valueOf() - 10000),
+    endDate: new Date(now.valueOf() + 10000),
+  });
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_origins", "recalc_frecency", {
+      host,
+    }),
+    0,
+    "Should have been calculated"
+  );
+  Assert.greater(
+    frecency,
+    await PlacesTestUtils.getDatabaseValue("moz_origins", "frecency", {
+      host,
+    }),
+    "frecency should have decreased"
+  );
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue(
+      "moz_origins",
+      "recalc_alt_frecency",
+      { host }
+    ),
+    0,
+    "Should have been calculated"
+  );
+  Assert.greater(
+    alt_frecency,
+    await PlacesTestUtils.getDatabaseValue("moz_origins", "alt_frecency", {
+      host,
+    }),
+    "alternative frecency should have decreased"
+  );
+
+  // Add another page to the same host.
+  const url2 = `https://${host}/second/`;
+  await PlacesTestUtils.addVisits(url2);
+  // Remove the first page.
+  await PlacesUtils.history.remove(url);
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_origins", "recalc_frecency", {
+      host,
+    }),
+    1,
+    "Frecency should be calculated"
+  );
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue(
+      "moz_origins",
+      "recalc_alt_frecency",
+      { host }
+    ),
+    1,
+    "Alt frecency should be calculated"
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_frecency_pages_alternative.js b/toolkit/components/places/tests/unit/test_frecency_pages_alternative.js
new file mode 100644
index 0000000000..0ea271c698
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_pages_alternative.js
@@ -0,0 +1,364 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests alternative pages frecency.
+// Note: the order of the tests here matters, since we are emulating subsquent
+// starts of the recalculator component with different initial conditions.
+
+const FEATURE_PREF = "places.frecency.pages.alternative.featureGate";
+
+async function restartRecalculator() {
+  let subject = {};
+  PlacesFrecencyRecalculator.observe(
+    subject,
+    "test-alternative-frecency-init",
+    ""
+  );
+  await subject.promise;
+}
+
+async function getAllPages() {
+  let db = await PlacesUtils.promiseDBConnection();
+  let rows = await db.execute(`SELECT * FROM moz_places`);
+  Assert.greater(rows.length, 0);
+  return rows.map(r => ({
+    url: r.getResultByName("url"),
+    frecency: r.getResultByName("frecency"),
+    recalc_frecency: r.getResultByName("recalc_frecency"),
+    alt_frecency: r.getResultByName("alt_frecency"),
+    recalc_alt_frecency: r.getResultByName("recalc_alt_frecency"),
+  }));
+}
+
+add_setup(async function () {
+  await PlacesTestUtils.addVisits([
+    "https://testdomain1.moz.org",
+    "https://testdomain2.moz.org",
+    "https://testdomain3.moz.org",
+  ]);
+  registerCleanupFunction(PlacesUtils.history.clear);
+});
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, false]],
+  },
+  async function test_normal_init() {
+    // The test starts with the pref enabled, otherwise we'd not have the SQL
+    // function defined. So here we disable it, then enable again later.
+    await restartRecalculator();
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.ok(
+      ObjectUtils.isEmpty(
+        await PlacesUtils.metadata.get(
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+          Object.create(null)
+        )
+      ),
+      "Check there's no variables stored"
+    );
+  }
+);
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, true]],
+  },
+  async function test_enable_init() {
+    // Set alt_frecency to NULL and recalc_alt_frecency = 0 for the entries in
+    // moz_places to verify they are recalculated.
+    await PlacesTestUtils.updateDatabaseValues("moz_places", {
+      alt_frecency: null,
+      recalc_alt_frecency: 0,
+    });
+
+    await restartRecalculator();
+
+    // Ensure moz_meta doesn't report anything.
+    Assert.ok(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.enabled,
+      "Check the pref is enabled"
+    );
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.equal(
+      (
+        await PlacesUtils.metadata.get(
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+          Object.create(null)
+        )
+      ).version,
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.variables
+        .version,
+      "Check the algorithm version has been stored"
+    );
+
+    // Check all alternative frecencies have been calculated, since we just have
+    // a few.
+    let pages = await getAllPages();
+    Assert.ok(
+      pages.every(p => p.recalc_alt_frecency == 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      pages.every(p => p.alt_frecency > 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      PlacesFrecencyRecalculator.isRecalculationPending,
+      "Recalculation should be pending"
+    );
+  }
+);
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, true]],
+  },
+  async function test_different_version() {
+    let pages = await getAllPages();
+    Assert.ok(
+      pages.every(p => p.recalc_alt_frecency == 0),
+      "All the entries should not need recalculation"
+    );
+
+    // Set alt_frecency to NULL to verify all the entries are recalculated.
+    await PlacesTestUtils.updateDatabaseValues("moz_places", {
+      alt_frecency: null,
+    });
+
+    // It doesn't matter that the version is, it just have to be different.
+    let variables = await PlacesUtils.metadata.get(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+      Object.create(null)
+    );
+    variables.version = 999;
+    await PlacesUtils.metadata.set(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+      variables
+    );
+
+    await restartRecalculator();
+
+    // Check alternative frecency has been marked for recalculation.
+    // Note just after init we reculate a chunk, and this test code is expected
+    // to run before that... though we can't be sure, so if this starts failing
+    // intermittently we'll have to add more synchronization test code.
+    pages = await getAllPages();
+    // Ensure moz_meta has been updated.
+    Assert.ok(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.enabled,
+      "Check the pref is enabled"
+    );
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.deepEqual(
+      (
+        await PlacesUtils.metadata.get(
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+          Object.create(null)
+        )
+      ).version,
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.variables
+        .version,
+      "Check the algorithm version has been stored"
+    );
+
+    // Check all alternative frecencies have been calculated, since we just have
+    // a few.
+    pages = await getAllPages();
+    Assert.ok(
+      pages.every(p => p.recalc_alt_frecency == 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      pages.every(p => p.alt_frecency > 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      PlacesFrecencyRecalculator.isRecalculationPending,
+      "Recalculation should be pending"
+    );
+  }
+);
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, true]],
+  },
+  async function test_different_variables() {
+    let pages = await getAllPages();
+    Assert.ok(
+      pages.every(p => p.recalc_alt_frecency == 0),
+      "All the entries should not need recalculation"
+    );
+
+    // Set alt_frecency to NULL to verify all the entries are recalculated.
+    await PlacesTestUtils.updateDatabaseValues("moz_places", {
+      alt_frecency: null,
+    });
+
+    // Change variables.
+    let variables = await PlacesUtils.metadata.get(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+      Object.create(null)
+    );
+    Assert.greater(Object.keys(variables).length, 1);
+    Assert.ok("version" in variables, "At least the version is always present");
+    await PlacesUtils.metadata.set(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+      {
+        version:
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.variables
+            .version,
+        someVar: 1,
+      }
+    );
+
+    await restartRecalculator();
+
+    // Ensure moz_meta has been updated.
+    Assert.ok(
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.enabled,
+      "Check the pref is enabled"
+    );
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.deepEqual(
+      await PlacesUtils.metadata.get(
+        PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+        Object.create(null)
+      ),
+      variables,
+      "Check the algorithm variables have been stored"
+    );
+
+    // Check all alternative frecencies have been calculated, since we just have
+    // a few.
+    pages = await getAllPages();
+    Assert.ok(
+      pages.every(p => p.recalc_alt_frecency == 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      pages.every(p => p.alt_frecency > 0),
+      "All the entries have been recalculated"
+    );
+    Assert.ok(
+      PlacesFrecencyRecalculator.isRecalculationPending,
+      "Recalculation should be pending"
+    );
+  }
+);
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, false]],
+  },
+  async function test_disable() {
+    let pages = await getAllPages();
+    Assert.ok(
+      pages.every(p => p.recalc_alt_frecency == 0),
+      "All the entries should not need recalculation"
+    );
+
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.equal(
+      (
+        await PlacesUtils.metadata.get(
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+          Object.create(null)
+        )
+      ).version,
+      PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.variables
+        .version,
+      "Check the algorithm version has been stored"
+    );
+
+    await restartRecalculator();
+
+    // Check alternative frecency has not been marked for recalculation.
+    pages = await getAllPages();
+    Assert.ok(
+      pages.every(p => p.recalc_alt_frecency == 0),
+      "The entries not have been marked for recalc"
+    );
+    Assert.ok(
+      pages.every(p => p.alt_frecency === null),
+      "All the alt_frecency values should have been nullified"
+    );
+
+    // Ensure moz_meta has been updated.
+    // Avoid hitting the cache, we want to check the actual database value.
+    PlacesUtils.metadata.cache.clear();
+    Assert.ok(
+      ObjectUtils.isEmpty(
+        await PlacesUtils.metadata.get(
+          PlacesFrecencyRecalculator.alternativeFrecencyInfo.pages.metadataKey,
+          Object.create(null)
+        )
+      ),
+      "Check the algorithm variables has been removed"
+    );
+  }
+);
+
+add_task(
+  {
+    pref_set: [[FEATURE_PREF, true]],
+  },
+  async function test_score() {
+    await restartRecalculator();
+
+    // This is not intended to cover the algorithm as a whole, but just as a
+    // sanity check for scores.
+
+    // Add before visits to properly set visit source.
+    await PlacesUtils.bookmarks.insert({
+      url: "https://visitedbookmark.moz.org",
+      parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    });
+
+    await PlacesTestUtils.addVisits([
+      {
+        url: "https://low.moz.org",
+        transition: PlacesUtils.history.TRANSITIONS.FRAMED_LINK,
+      },
+      {
+        url: "https://visitedbookmark.moz.org",
+        transition: PlacesUtils.history.TRANSITIONS.FRAMED_LINK,
+      },
+      {
+        url: "https://old.moz.org",
+        visitDate: (Date.now() - 2 * 86400000) * 1000,
+      },
+      { url: "https://base.moz.org" },
+      { url: "https://manyvisits.moz.org" },
+      { url: "https://manyvisits.moz.org" },
+      { url: "https://manyvisits.moz.org" },
+      { url: "https://manyvisits.moz.org" },
+    ]);
+    await PlacesUtils.bookmarks.insert({
+      url: "https://unvisitedbookmark.moz.org",
+      parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    });
+    await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+    let getFrecency = url =>
+      PlacesTestUtils.getDatabaseValue("moz_places", "alt_frecency", {
+        url,
+      });
+    let low = await getFrecency("https://low.moz.org/");
+    let old = await getFrecency("https://old.moz.org/");
+    Assert.greater(old, low);
+    let base = await getFrecency("https://base.moz.org/");
+    Assert.greater(base, old);
+    let unvisitedBm = await getFrecency("https://unvisitedbookmark.moz.org/");
+    Assert.greater(unvisitedBm, base);
+    let manyVisits = await getFrecency("https://manyvisits.moz.org/");
+    Assert.greater(manyVisits, unvisitedBm);
+    let visitedBm = await getFrecency("https://visitedbookmark.moz.org/");
+    Assert.greater(visitedBm, base);
+  }
+);
diff --git a/toolkit/components/places/tests/unit/test_frecency_pages_recalc_alt.js b/toolkit/components/places/tests/unit/test_frecency_pages_recalc_alt.js
new file mode 100644
index 0000000000..9642e87ad2
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_pages_recalc_alt.js
@@ -0,0 +1,97 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that recalc_alt_frecency in the moz_places table is updated correctly.
+
+add_task(async function test() {
+  // Start from a stable situation, otherwise the recalculator may set recalc
+  // field at any time due to the initialization.
+  let subject = {};
+  PlacesFrecencyRecalculator.observe(
+    subject,
+    "test-alternative-frecency-init",
+    ""
+  );
+  await subject.promise;
+
+  info("test recalc_alt_frecency is set to 1 when a visit is added");
+  const now = new Date();
+  const URL = "https://mozilla.org/test/";
+  let getRecalc = url =>
+    PlacesTestUtils.getDatabaseValue("moz_places", "recalc_alt_frecency", {
+      url,
+    });
+  let setRecalc = (url, val) =>
+    PlacesTestUtils.updateDatabaseValues(
+      "moz_places",
+      { recalc_alt_frecency: val },
+      { url }
+    );
+  let getFrecency = url =>
+    PlacesTestUtils.getDatabaseValue("moz_places", "alt_frecency", {
+      url,
+    });
+  await PlacesTestUtils.addVisits([
+    {
+      url: URL,
+      visitDate: now,
+    },
+    {
+      url: URL,
+      visitDate: new Date(new Date().setDate(now.getDate() - 30)),
+    },
+  ]);
+  // The frecency has been recalculated by addVisits already, checking that
+  // alt frecency has a positive value should be sufficient anyway.
+  Assert.equal(await getRecalc(URL), 0);
+  Assert.greater(await getFrecency(URL), 0);
+
+  info("Remove just one visit (otherwise the page would be orphaned).");
+  await PlacesUtils.history.removeVisitsByFilter({
+    beginDate: new Date(now.valueOf() - 10000),
+    endDate: new Date(now.valueOf() + 10000),
+  });
+  Assert.equal(await getRecalc(URL), 1);
+  await setRecalc(URL, 0);
+
+  info("Add a bookmark to the page");
+  let bm = await PlacesUtils.bookmarks.insert({
+    url: URL,
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  Assert.equal(await getRecalc(URL), 1);
+  await setRecalc(URL, 0);
+
+  info("Clear history");
+  await PlacesUtils.history.clear();
+  Assert.equal(await getRecalc(URL), 1);
+  await setRecalc(URL, 0);
+
+  // Add back a visit so the page is not an orphan once we remove the bookmark.
+  await PlacesTestUtils.addVisits(URL);
+  Assert.equal(await getRecalc(URL), 0);
+  Assert.greater(await getFrecency(URL), 0);
+
+  info("change the bookmark URL");
+  const URL2 = "https://editedbookmark.org/";
+  bm.url = URL2;
+  await PlacesUtils.bookmarks.update(bm);
+  Assert.equal(await getRecalc(URL), 1);
+  Assert.equal(await getRecalc(URL2), 1);
+  await setRecalc(URL, 0);
+  await setRecalc(URL2, 0);
+
+  info("Remove the bookmark from the page");
+  await PlacesUtils.bookmarks.remove(bm);
+  Assert.equal(await getRecalc(URL2), 1);
+  await setRecalc(URL2, 0);
+
+  const URL3 = "https://test3.moz.org/";
+  const URL4 = "https://test4.moz.org/";
+  info("Insert multiple pages now");
+  await PlacesTestUtils.addVisits([URL3, URL4]);
+  Assert.equal(await getRecalc(URL3), 0);
+  Assert.greater(await getFrecency(URL3), 0);
+  Assert.equal(await getRecalc(URL4), 0);
+  Assert.greater(await getFrecency(URL4), 0);
+});
diff --git a/toolkit/components/places/tests/unit/test_frecency_recalc_triggers.js b/toolkit/components/places/tests/unit/test_frecency_recalc_triggers.js
new file mode 100644
index 0000000000..2e75a6d459
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_recalc_triggers.js
@@ -0,0 +1,281 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests that all the operations affecting frecency are either recalculating
+ * immediately or triggering a recalculation.
+ * Operations that should recalculate immediately:
+ *  - adding visits
+ * Operations that should just trigger a recalculation:
+ *  - removing visits
+ *  - adding a bookmark
+ *  - removing a bookmark
+ *  - changing url of a bookmark
+ *
+ * Also check setting a frecency resets recalc_frecency to 0.
+ **/
+
+const TEST_URL = "https://example.com/";
+const TEST_URL_2 = "https://example2.com/";
+
+// NOTE: Until we fix Bug 1806666 this test has to run queries manually because
+// the official APIs recalculate frecency immediately. After the fix, these
+// helpers can be removed and the test can be much simpler.
+function insertVisit(url) {
+  return PlacesUtils.withConnectionWrapper("insertVisit", async db => {
+    await db.execute(
+      `INSERT INTO moz_historyvisits(place_id, visit_date, visit_type)
+       VALUES ((SELECT id FROM moz_places WHERE url = :url), 1648226608386000, 1)`,
+      { url }
+    );
+  });
+}
+function removeVisit(url) {
+  return PlacesUtils.withConnectionWrapper("insertVisit", async db => {
+    await db.execute(
+      `DELETE FROM moz_historyvisits WHERE place_id
+        = (SELECT id FROM moz_places WHERE url = :url)`,
+      { url }
+    );
+  });
+}
+function resetFrecency(url) {
+  return PlacesUtils.withConnectionWrapper("insertVisit", async db => {
+    await db.execute(`UPDATE moz_places SET frecency = -1 WHERE url = :url`, {
+      url,
+    });
+  });
+}
+
+add_task(async function test_visit() {
+  // First add a bookmark so the page is not orphaned.
+  let bm = await PlacesUtils.bookmarks.insert({
+    url: TEST_URL,
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+  });
+
+  info("Add a visit check frecency is calculated immediately");
+  await PlacesTestUtils.addVisits(TEST_URL);
+  let originalFrecency = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.greater(originalFrecency, 0, "frecency was recalculated immediately");
+  let recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(recalc, 0, "frecency doesn't need a recalc");
+
+  info("Add a visit (raw query) check frecency is not calculated immediately");
+  await insertVisit(TEST_URL);
+  let frecency = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(frecency, originalFrecency, "frecency is unchanged");
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(recalc, 1, "frecency needs a recalc");
+
+  info("Check setting frecency resets recalc_frecency");
+  await resetFrecency(TEST_URL);
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(recalc, 0, "frecency doesn't need a recalc");
+
+  info("Removing a visit sets recalc_frecency");
+  await removeVisit(TEST_URL);
+  frecency = await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+    url: TEST_URL,
+  });
+  Assert.equal(frecency, -1, "frecency is unchanged");
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(recalc, 1, "frecency needs a recalc");
+
+  await PlacesUtils.history.clear();
+  await PlacesUtils.bookmarks.remove(bm);
+});
+
+add_task(async function test_bookmark() {
+  // First add a visit so the page is not orphaned.
+  await PlacesTestUtils.addVisits([TEST_URL, TEST_URL_2]);
+
+  let originalFrecency = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.greater(originalFrecency, 0);
+
+  info("Check adding a bookmark sets recalc_frecency");
+  let bm = await PlacesUtils.bookmarks.insert({
+    url: TEST_URL,
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+  });
+
+  let frecency = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(frecency, originalFrecency, "frecency is unchanged");
+  let recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(recalc, 1, "frecency needs a recalc");
+
+  info("Check changing a bookmark url sets recalc_frecency on both urls");
+  await PlacesUtils.bookmarks.update({
+    guid: bm.guid,
+    url: TEST_URL_2,
+  });
+  frecency = await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+    url: TEST_URL,
+  });
+  Assert.equal(frecency, originalFrecency, "frecency is unchanged");
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(recalc, 1, "frecency needs a recalc");
+  frecency = await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+    url: TEST_URL_2,
+  });
+  Assert.ok(frecency > 0, "frecency is valid");
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL_2,
+    }
+  );
+  Assert.equal(recalc, 1, "frecency needs a recalc");
+
+  info("Check setting frecency resets recalc_frecency");
+  await resetFrecency(TEST_URL);
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(recalc, 0, "frecency doesn't need a recalc");
+  await resetFrecency(TEST_URL_2);
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL_2,
+    }
+  );
+  Assert.equal(recalc, 0, "frecency doesn't need a recalc");
+
+  info("Removing a bookmark sets recalc_frecency");
+  await PlacesUtils.bookmarks.remove(bm.guid);
+  frecency = await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+    url: TEST_URL,
+  });
+  Assert.equal(frecency, -1, "frecency is unchanged");
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL,
+    }
+  );
+  Assert.equal(recalc, 0, "frecency doesn't need a recalc");
+  frecency = await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+    url: TEST_URL_2,
+  });
+  Assert.equal(frecency, -1, "frecency is unchanged");
+  recalc = await PlacesTestUtils.getDatabaseValue(
+    "moz_places",
+    "recalc_frecency",
+    {
+      url: TEST_URL_2,
+    }
+  );
+  Assert.equal(recalc, 1, "frecency needs a recalc");
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function test_bookmark_frecency_zero() {
+  info("A url with frecency 0 should be recalculated if bookmarked");
+  let url = "https://zerofrecency.org/";
+  await PlacesTestUtils.addVisits({ url, transition: TRANSITION_FRAMED_LINK });
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", { url }),
+    0
+  );
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "recalc_frecency", {
+      url,
+    }),
+    0
+  );
+  await PlacesUtils.bookmarks.insert({
+    url,
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+  });
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "recalc_frecency", {
+      url,
+    }),
+    1
+  );
+  info("place: uris should not be recalculated");
+  url = "place:test";
+  await PlacesUtils.bookmarks.insert({
+    url,
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+  });
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", { url }),
+    0
+  );
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "recalc_frecency", {
+      url,
+    }),
+    0
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_frecency_recalculator.js b/toolkit/components/places/tests/unit/test_frecency_recalculator.js
new file mode 100644
index 0000000000..ed4501c56a
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_recalculator.js
@@ -0,0 +1,178 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test PlacesFrecencyRecalculator scheduling.
+
+// Enable the collection (during test) for all products so even products
+// that don't collect the data will be able to run the test without failure.
+Services.prefs.setBoolPref(
+  "toolkit.telemetry.testing.overrideProductsCheck",
+  true
+);
+
+async function getOriginFrecency(origin) {
+  let db = await PlacesUtils.promiseDBConnection();
+  return (
+    await db.execute(
+      `SELECT frecency
+       FROM moz_origins
+       WHERE host = :origin`,
+      { origin }
+    )
+  )[0].getResultByIndex(0);
+}
+
+async function resetOriginFrecency(origin) {
+  await PlacesUtils.withConnectionWrapper(
+    "test_frecency_recalculator reset origin",
+    async db => {
+      await db.executeCached(
+        `UPDATE moz_origins
+         SET frecency = -1
+         WHERE host = :origin`,
+        { origin }
+      );
+    }
+  );
+}
+
+async function addVisitsAndSetRecalc(urls) {
+  await PlacesTestUtils.addVisits(urls);
+  await PlacesUtils.withConnectionWrapper(
+    "test_frecency_recalculator set recalc",
+    async db => {
+      await db.executeCached(
+        `UPDATE moz_places
+         SET frecency = -1
+         WHERE url in (
+           ${PlacesUtils.sqlBindPlaceholders(urls)}
+         )`,
+        urls
+      );
+      await db.executeCached(
+        `UPDATE moz_places
+         SET recalc_frecency = (CASE WHEN url in (
+               ${PlacesUtils.sqlBindPlaceholders(urls)}
+             ) THEN 1 ELSE 0 END)`,
+        urls
+      );
+    }
+  );
+}
+
+add_task(async function test() {
+  info("On startup a recalculation is always pending.");
+  Assert.ok(
+    PlacesFrecencyRecalculator.isRecalculationPending,
+    "Recalculation should be pending"
+  );
+  // If everything gets recalculated, then it should not be pending anymore.
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  Assert.ok(
+    !PlacesFrecencyRecalculator.isRecalculationPending,
+    "Recalculation should not be pending"
+  );
+
+  // If after a recalculation there's outdated entries left, a new recalculation
+  // should be pending.
+  info("Insert outdated frecencies");
+  const url1 = new URL("https://test1.moz.org/");
+  const url2 = new URL("https://test2.moz.org/");
+  await addVisitsAndSetRecalc([url1.href, url2.href]);
+  await resetOriginFrecency(url1.host);
+  await resetOriginFrecency(url2.host);
+
+  Assert.ok(
+    PlacesUtils.history.shouldStartFrecencyRecalculation,
+    "Should have set shouldStartFrecencyRecalculation"
+  );
+  await PlacesFrecencyRecalculator.recalculateSomeFrecencies({ chunkSize: 1 });
+  Assert.ok(
+    PlacesFrecencyRecalculator.isRecalculationPending,
+    "Recalculation should be pending"
+  );
+  // Recalculating uri1 will set its origin to recalc, that means there's 2
+  // origins to recalc now. Passing chunkSize: 2 here would then retrigger the
+  // recalc, thinking we saturated the chunk, thus we use 3.
+  await PlacesFrecencyRecalculator.recalculateSomeFrecencies({ chunkSize: 3 });
+  Assert.ok(
+    !PlacesFrecencyRecalculator.isRecalculationPending,
+    "Recalculation should not be pending"
+  );
+  Assert.ok(
+    !PlacesUtils.history.shouldStartFrecencyRecalculation,
+    "Should have unset shouldStartFrecencyRecalculation"
+  );
+
+  Assert.greater(await getOriginFrecency(url1.host), 0);
+  Assert.greater(await getOriginFrecency(url2.host), 0);
+
+  info("Changing recalc_frecency of an entry adds a pending recalculation.");
+  PlacesUtils.history.shouldStartFrecencyRecalculation = false;
+  let promiseNotify = TestUtils.topicObserved("frecency-recalculation-needed");
+  await PlacesUtils.withConnectionWrapper(
+    "test_frecency_recalculator",
+    async db => {
+      await db.executeCached(
+        `UPDATE moz_places SET recalc_frecency = 1 WHERE url = :url`,
+        { url: url1.href }
+      );
+    }
+  );
+  Assert.ok(
+    PlacesUtils.history.shouldStartFrecencyRecalculation,
+    "Should have set shouldStartFrecencyRecalculation"
+  );
+
+  await promiseNotify;
+  Assert.ok(
+    PlacesFrecencyRecalculator.isRecalculationPending,
+    "Recalculation should be pending"
+  );
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  Assert.ok(
+    !PlacesUtils.history.shouldStartFrecencyRecalculation,
+    "Should have unset shouldStartFrecencyRecalculation"
+  );
+});
+
+add_task(async function test_chunk_time_telemetry() {
+  await PlacesUtils.bookmarks.insert({
+    url: "https://test-bookmark.com",
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+  });
+  Assert.ok(
+    PlacesUtils.history.shouldStartFrecencyRecalculation,
+    "Should have set shouldStartFrecencyRecalculation"
+  );
+  let histogram = TelemetryTestUtils.getAndClearHistogram(
+    "PLACES_FRECENCY_RECALC_CHUNK_TIME_MS"
+  );
+  let subject = {};
+  PlacesFrecencyRecalculator.observe(subject, "test-execute-taskFn", "");
+  await subject.promise;
+  let snapshot = histogram.snapshot();
+  Assert.equal(
+    Object.values(snapshot.values).reduce((a, b) => a + b, 0),
+    1
+  );
+  Assert.greater(snapshot.sum, 0);
+  Assert.ok(
+    !PlacesUtils.history.shouldStartFrecencyRecalculation,
+    "Should have unset shouldStartFrecencyRecalculation"
+  );
+
+  // It should now not report any new time, since there's nothing to recalculate.
+  histogram.clear();
+  PlacesFrecencyRecalculator.observe(subject, "test-execute-taskFn", "");
+  await subject.promise;
+  snapshot = histogram.snapshot();
+  Assert.equal(
+    Object.values(snapshot.values).reduce((a, b) => a + b, 0),
+    0
+  );
+  Assert.ok(
+    !PlacesUtils.history.shouldStartFrecencyRecalculation,
+    "Should still not have set shouldStartFrecencyRecalculation"
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_frecency_unvisited_bookmark.js b/toolkit/components/places/tests/unit/test_frecency_unvisited_bookmark.js
new file mode 100644
index 0000000000..ae7bd3d813
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_unvisited_bookmark.js
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests frecency of unvisited bookmarks.
+
+add_task(async function () {
+  // Randomly sorted by date.
+  const now = new Date();
+  const bookmarks = [
+    {
+      url: "https://example.com/1",
+      date: new Date(new Date().setDate(now.getDate() - 30)),
+    },
+    {
+      url: "https://example.com/2",
+      date: new Date(new Date().setDate(now.getDate() - 1)),
+    },
+    {
+      url: "https://example.com/3",
+      date: new Date(new Date().setDate(now.getDate() - 100)),
+    },
+    {
+      url: "https://example.com/1", // Same url but much older.
+      date: new Date(new Date().setDate(now.getDate() - 120)),
+    },
+  ];
+
+  for (let bookmark of bookmarks) {
+    await PlacesUtils.bookmarks.insert({
+      parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+      url: bookmark.url,
+      dateAdded: bookmark.date,
+    });
+  }
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  // The newest bookmark should have an higher frecency.
+  Assert.greater(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: bookmarks[1].url,
+    }),
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: bookmarks[0].url,
+    })
+  );
+  Assert.greater(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: bookmarks[0].url,
+    }),
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: bookmarks[2].url,
+    })
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_frecency_zero_updated.js b/toolkit/components/places/tests/unit/test_frecency_zero_updated.js
new file mode 100644
index 0000000000..44c329635e
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_frecency_zero_updated.js
@@ -0,0 +1,38 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests a zero frecency is correctly updated when inserting new valid visits.
+
+add_task(async function () {
+  const TEST_URI = NetUtil.newURI("http://example.com/");
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: TEST_URI,
+    title: "A title",
+  });
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  Assert.ok(
+    (await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    })) > 0
+  );
+
+  // Removing the bookmark should leave an orphan page with zero frecency.
+  // Note this would usually be expired later by expiration.
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  // Now add a valid visit to the page, frecency should increase.
+  await PlacesTestUtils.addVisits({ uri: TEST_URI });
+  Assert.ok(
+    (await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    })) > 0
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_getChildIndex.js b/toolkit/components/places/tests/unit/test_getChildIndex.js
new file mode 100644
index 0000000000..35eb6fd22b
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_getChildIndex.js
@@ -0,0 +1,73 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+ * vim:set ts=2 sw=2 sts=2 et:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Tests nsNavHistoryContainerResultNode::GetChildIndex(aNode) functionality.
+ */
+
+add_task(async function test_get_child_index() {
+  // Add a bookmark to the menu.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: "http://test.mozilla.org/bookmark/",
+    title: "Test bookmark",
+  });
+
+  // Add a bookmark to unfiled folder.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "http://test.mozilla.org/unfiled/",
+    title: "Unfiled bookmark",
+  });
+
+  // Get the unfiled bookmark node.
+  let unfiledNode = getNodeAt(PlacesUtils.bookmarks.unfiledGuid, 0);
+  if (!unfiledNode) {
+    do_throw("Unable to find bookmark in hierarchy!");
+  }
+  Assert.equal(unfiledNode.title, "Unfiled bookmark");
+
+  let hs = PlacesUtils.history;
+  let query = hs.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.menuGuid]);
+  let options = hs.getNewQueryOptions();
+  options.queryType = options.QUERY_TYPE_BOOKMARKS;
+  let root = hs.executeQuery(query, options).root;
+  root.containerOpen = true;
+
+  // Check functionality for proper nodes.
+  for (let i = 0; i < root.childCount; i++) {
+    let node = root.getChild(i);
+    print("Now testing: " + node.title);
+    Assert.equal(root.getChildIndex(node), i);
+  }
+
+  // Now search for an invalid node and expect an exception.
+  try {
+    root.getChildIndex(unfiledNode);
+    do_throw("Searching for an invalid node should have thrown.");
+  } catch (ex) {
+    print("We correctly got an exception.");
+  }
+
+  root.containerOpen = false;
+});
+
+function getNodeAt(aFolderGuid, aIndex) {
+  let hs = PlacesUtils.history;
+  let query = hs.getNewQuery();
+  query.setParents([aFolderGuid]);
+  let options = hs.getNewQueryOptions();
+  options.queryType = options.QUERY_TYPE_BOOKMARKS;
+  let root = hs.executeQuery(query, options).root;
+  root.containerOpen = true;
+  if (root.childCount < aIndex) {
+    do_throw("Not enough children to find bookmark!");
+  }
+  let node = root.getChild(aIndex);
+  root.containerOpen = false;
+  return node;
+}
diff --git a/toolkit/components/places/tests/unit/test_get_query_param_sql_function.js b/toolkit/components/places/tests/unit/test_get_query_param_sql_function.js
new file mode 100644
index 0000000000..072f53ceac
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_get_query_param_sql_function.js
@@ -0,0 +1,21 @@
+add_task(async function test_get_query_param_sql_function() {
+  let db = await PlacesUtils.promiseDBConnection();
+  await Assert.rejects(
+    db.execute(`SELECT get_query_param()`),
+    /wrong number of arguments/
+  );
+  let rows = await db.execute(`SELECT
+    get_query_param('a=b&c=d', 'a'),
+    get_query_param('a=b&c=d', 'c'),
+    get_query_param('a=b&a=c', 'a'),
+    get_query_param('a=b&c=d', 'e'),
+    get_query_param('a', 'a'),
+    get_query_param(NULL, NULL),
+    get_query_param('a=b&c=d', NULL),
+    get_query_param(NULL, 'a')`);
+  let results = ["b", "d", "b", null, "", null, null, null];
+  equal(rows[0].numEntries, results.length);
+  for (let i = 0; i < results.length; ++i) {
+    equal(rows[0].getResultByIndex(i), results[i]);
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_hash.js b/toolkit/components/places/tests/unit/test_hash.js
new file mode 100644
index 0000000000..701cb3d151
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_hash.js
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+add_task(async function () {
+  // Check particular unicode urls with insertion and selection APIs to ensure
+  // url hashes match properly.
+  const URLS = [
+    "http://президент.президент/президент/",
+    "https://www.аррӏе.com/аррӏе/",
+    "http://名がドメイン/",
+  ];
+
+  for (let url of URLS) {
+    await PlacesTestUtils.addVisits(url);
+    Assert.ok(await PlacesUtils.history.fetch(url), "Found the added visit");
+    await PlacesUtils.bookmarks.insert({
+      url,
+      parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    });
+    Assert.ok(
+      await PlacesUtils.bookmarks.fetch({ url }),
+      "Found the added bookmark"
+    );
+    let db = await PlacesUtils.promiseDBConnection();
+    let rows = await db.execute(
+      "SELECT id FROM moz_places WHERE url_hash = hash(:url) AND url = :url",
+      { url: new URL(url).href }
+    );
+    Assert.equal(rows.length, 1, "Matched the place from the database");
+    let id = rows[0].getResultByName("id");
+
+    // Now, suppose the urls has been inserted without proper parsing and retry.
+    // This should normally not happen through the API, but we have evidence
+    // it somehow happened.
+    await PlacesUtils.withConnectionWrapper("test_hash.js", async wdb => {
+      await wdb.execute(
+        `
+        UPDATE moz_places SET url_hash = hash(:url), url = :url
+        WHERE id = :id
+      `,
+        { url, id }
+      );
+      rows = await wdb.execute(
+        "SELECT id FROM moz_places WHERE url_hash = hash(:url) AND url = :url",
+        { url }
+      );
+      Assert.equal(rows.length, 1, "Matched the place from the database");
+    });
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_history.js b/toolkit/components/places/tests/unit/test_history.js
new file mode 100644
index 0000000000..3ea3696317
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_history.js
@@ -0,0 +1,158 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Get history services
+var histsvc = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+  Ci.nsINavHistoryService
+);
+
+/**
+ * Checks to see that a URI is in the database.
+ *
+ * @param aURI
+ *        The URI to check.
+ * @returns true if the URI is in the DB, false otherwise.
+ */
+function uri_in_db(aURI) {
+  var options = histsvc.getNewQueryOptions();
+  options.maxResults = 1;
+  options.resultType = options.RESULTS_AS_URI;
+  var query = histsvc.getNewQuery();
+  query.uri = aURI;
+  var result = histsvc.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  var cc = root.childCount;
+  root.containerOpen = false;
+  return cc == 1;
+}
+
+// main
+
+add_task(async function test_execute() {
+  // we have a new profile, so we should have imported bookmarks
+  Assert.equal(histsvc.databaseStatus, histsvc.DATABASE_STATUS_CREATE);
+
+  // add a visit
+  var testURI = uri("http://mozilla.com");
+  await PlacesTestUtils.addVisits(testURI);
+
+  // now query for the visit, setting sorting and limit such that
+  // we should retrieve only the visit we just added
+  var options = histsvc.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_DATE_DESCENDING;
+  options.maxResults = 1;
+  options.resultType = options.RESULTS_AS_VISIT;
+  var query = histsvc.getNewQuery();
+  var result = histsvc.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  var cc = root.childCount;
+  for (var i = 0; i < cc; ++i) {
+    var node = root.getChild(i);
+    // test node properties in RESULTS_AS_VISIT
+    Assert.equal(node.uri, testURI.spec);
+    Assert.equal(node.type, Ci.nsINavHistoryResultNode.RESULT_TYPE_URI);
+  }
+  root.containerOpen = false;
+
+  // add another visit for the same URI, and a third visit for a different URI
+  var testURI2 = uri("http://google.com/");
+  await PlacesTestUtils.addVisits(testURI);
+  await PlacesTestUtils.addVisits(testURI2);
+
+  options.maxResults = 5;
+  options.resultType = options.RESULTS_AS_URI;
+
+  // test minVisits
+  query.minVisits = 0;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 2);
+  result.root.containerOpen = false;
+  query.minVisits = 1;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 2);
+  result.root.containerOpen = false;
+  query.minVisits = 2;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 1);
+  query.minVisits = 3;
+  result.root.containerOpen = false;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 0);
+  result.root.containerOpen = false;
+
+  // test maxVisits
+  query.minVisits = -1;
+  query.maxVisits = -1;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 2);
+  result.root.containerOpen = false;
+  query.maxVisits = 0;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 0);
+  result.root.containerOpen = false;
+  query.maxVisits = 1;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 1);
+  result.root.containerOpen = false;
+  query.maxVisits = 2;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 2);
+  result.root.containerOpen = false;
+  query.maxVisits = 3;
+  result = histsvc.executeQuery(query, options);
+  result.root.containerOpen = true;
+  Assert.equal(result.root.childCount, 2);
+  result.root.containerOpen = false;
+
+  // By default history is enabled.
+  Assert.ok(!histsvc.historyDisabled);
+
+  // test getPageTitle
+  await PlacesTestUtils.addVisits({
+    uri: uri("http://example.com"),
+    title: "title",
+  });
+  let placeInfo = await PlacesUtils.history.fetch("http://example.com");
+  Assert.equal(placeInfo.title, "title");
+
+  // query for the visit
+  Assert.ok(uri_in_db(testURI));
+
+  // test for schema changes in bug 373239
+  // get direct db connection
+  var db = histsvc.DBConnection;
+  var q = "SELECT id FROM moz_bookmarks";
+  var statement;
+  try {
+    statement = db.createStatement(q);
+  } catch (ex) {
+    do_throw("bookmarks table does not have id field, schema is too old!");
+  } finally {
+    statement.finalize();
+  }
+
+  // bug 394741 - regressed history text searches
+  await PlacesTestUtils.addVisits(uri("http://mozilla.com"));
+  options = histsvc.getNewQueryOptions();
+  // options.resultType = options.RESULTS_AS_VISIT;
+  query = histsvc.getNewQuery();
+  query.searchTerms = "moz";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.ok(root.childCount > 0);
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_history_clear.js b/toolkit/components/places/tests/unit/test_history_clear.js
new file mode 100644
index 0000000000..7c121a5b84
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_history_clear.js
@@ -0,0 +1,146 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var mDBConn = DBConn();
+
+add_task(async function test_history_clear() {
+  await PlacesTestUtils.addVisits([
+    { uri: uri("http://typed.mozilla.org/"), transition: TRANSITION_TYPED },
+    { uri: uri("http://link.mozilla.org/"), transition: TRANSITION_LINK },
+    {
+      uri: uri("http://download.mozilla.org/"),
+      transition: TRANSITION_DOWNLOAD,
+    },
+    {
+      uri: uri("http://redir_temp.mozilla.org/"),
+      transition: TRANSITION_REDIRECT_TEMPORARY,
+      referrer: "http://link.mozilla.org/",
+    },
+    {
+      uri: uri("http://redir_perm.mozilla.org/"),
+      transition: TRANSITION_REDIRECT_PERMANENT,
+      referrer: "http://link.mozilla.org/",
+    },
+  ]);
+
+  // add a place: bookmark
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: `place:parent=${PlacesUtils.bookmarks.tagsGuid}`,
+    title: "shortcut",
+  });
+
+  // Add an expire never annotation
+  // Actually expire never annotations are removed as soon as a page is removed
+  // from the database, so this should act as a normal visit.
+  await PlacesUtils.history.update({
+    url: "http://download.mozilla.org/",
+    annotations: new Map([["never", "never"]]),
+  });
+
+  // Add a bookmark
+  // Bookmarked page should have history cleared and frecency to be recalculated
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: "http://typed.mozilla.org/",
+    title: "bookmark",
+  });
+
+  await PlacesTestUtils.addVisits([
+    { uri: uri("http://typed.mozilla.org/"), transition: TRANSITION_BOOKMARK },
+    { uri: uri("http://frecency.mozilla.org/"), transition: TRANSITION_LINK },
+  ]);
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  // Clear history and wait for the history-cleared event notification.
+  let promiseClearHistory =
+    PlacesTestUtils.waitForNotification("history-cleared");
+  await PlacesUtils.history.clear();
+  await promiseClearHistory;
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  // Check that frecency for not cleared items (bookmarks) has been marked
+  // as to be recalculated.
+  let stmt = mDBConn.createStatement(
+    "SELECT h.id FROM moz_places h WHERE frecency <> 0 AND h.recalc_frecency = 0 "
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+
+  stmt = mDBConn.createStatement(
+    `SELECT h.id FROM moz_places h WHERE h.recalc_frecency = 1
+       AND EXISTS (SELECT id FROM moz_bookmarks WHERE fk = h.id) LIMIT 1`
+  );
+  Assert.ok(stmt.executeStep());
+  stmt.finalize();
+
+  // Check that all visit_counts have been brought to 0
+  stmt = mDBConn.createStatement(
+    "SELECT id FROM moz_places WHERE visit_count <> 0 LIMIT 1"
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+
+  // Check that history tables are empty
+  stmt = mDBConn.createStatement(
+    "SELECT * FROM (SELECT id FROM moz_historyvisits LIMIT 1)"
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+
+  // Check that all moz_places entries except bookmarks and place: have been removed
+  stmt = mDBConn.createStatement(
+    `SELECT h.id FROM moz_places h WHERE
+       url_hash NOT BETWEEN hash('place', 'prefix_lo') AND hash('place', 'prefix_hi')
+       AND NOT EXISTS (SELECT id FROM moz_bookmarks WHERE fk = h.id) LIMIT 1`
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+
+  // Check that we only have favicons for retained places
+  stmt = mDBConn.createStatement(
+    `SELECT 1
+     FROM moz_pages_w_icons
+     LEFT JOIN moz_places h ON url_hash = page_url_hash AND url = page_url
+     WHERE h.id ISNULL`
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+  stmt = mDBConn.createStatement(
+    `SELECT 1
+     FROM moz_icons WHERE id NOT IN (
+       SELECT icon_id FROM moz_icons_to_pages
+     )`
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+
+  // Check that we only have annotations for retained places
+  stmt = mDBConn.createStatement(
+    `SELECT a.id FROM moz_annos a WHERE NOT EXISTS
+       (SELECT id FROM moz_places WHERE id = a.place_id) LIMIT 1`
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+
+  // Check that we only have inputhistory for retained places
+  stmt = mDBConn.createStatement(
+    `SELECT i.place_id FROM moz_inputhistory i WHERE NOT EXISTS
+       (SELECT id FROM moz_places WHERE id = i.place_id) LIMIT 1`
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+
+  // Check that place:uris have frecency 0
+  stmt = mDBConn.createStatement(
+    `SELECT h.id FROM moz_places h
+     WHERE url_hash BETWEEN hash('place', 'prefix_lo')
+                        AND hash('place', 'prefix_hi')
+       AND h.frecency <> 0 LIMIT 1`
+  );
+  Assert.ok(!stmt.executeStep());
+  stmt.finalize();
+});
diff --git a/toolkit/components/places/tests/unit/test_history_notifications.js b/toolkit/components/places/tests/unit/test_history_notifications.js
new file mode 100644
index 0000000000..339080b042
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_history_notifications.js
@@ -0,0 +1,50 @@
+const NS_PLACES_INIT_COMPLETE_TOPIC = "places-init-complete";
+let gLockedConn;
+
+add_task(async function setup() {
+  // Create a dummy places.sqlite and open an unshared connection on it
+  let db = Services.dirsvc.get("ProfD", Ci.nsIFile);
+  db.append("places.sqlite");
+  gLockedConn = Services.storage.openUnsharedDatabase(db);
+  Assert.ok(db.exists(), "The database should have been created");
+
+  // We need an exclusive lock on the db
+  gLockedConn.executeSimpleSQL("PRAGMA locking_mode = EXCLUSIVE");
+  // Exclusive locking is lazy applied, we need to make a write to activate it
+  gLockedConn.executeSimpleSQL("PRAGMA USER_VERSION = 1");
+});
+
+add_task(async function locked() {
+  // Try to create history service while the db is locked.
+  // It should be possible to create the service, but any method using the
+  // database will fail.
+  let resolved = false;
+  let promiseComplete = promiseTopicObserved(
+    NS_PLACES_INIT_COMPLETE_TOPIC
+  ).then(() => (resolved = true));
+  let history = Cc["@mozilla.org/browser/nav-history-service;1"].createInstance(
+    Ci.nsINavHistoryService
+  );
+  // The notification shouldn't happen until something tries to use the database.
+  await new Promise(resolve => do_timeout(100, resolve));
+  Assert.equal(
+    resolved,
+    false,
+    "The notification should not have been fired yet"
+  );
+  // This will initialize the database.
+  Assert.equal(history.databaseStatus, history.DATABASE_STATUS_LOCKED);
+  await promiseComplete;
+
+  // Close our connection and try to cleanup the file (could fail on Windows)
+  gLockedConn.close();
+  let db = Services.dirsvc.get("ProfD", Ci.nsIFile);
+  db.append("places.sqlite");
+  if (db.exists()) {
+    try {
+      db.remove(false);
+    } catch (e) {
+      info("Unable to remove dummy places.sqlite");
+    }
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_history_observer.js b/toolkit/components/places/tests/unit/test_history_observer.js
new file mode 100644
index 0000000000..1a9323f890
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_history_observer.js
@@ -0,0 +1,186 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Registers a one-time places observer for 'page-visited',
+ * which resolves a promise on being called.
+ */
+function promiseVisitAdded(callback) {
+  return new Promise(resolve => {
+    async function listener(events) {
+      PlacesObservers.removeListener(["page-visited"], listener);
+      Assert.equal(events.length, 1, "Right number of visits notified");
+      Assert.equal(events[0].type, "page-visited");
+      await callback(events[0]);
+      resolve();
+    }
+    PlacesObservers.addListener(["page-visited"], listener);
+  });
+}
+
+/**
+ * Asynchronous task that adds a visit to the history database.
+ */
+async function task_add_visit(uri, timestamp, transition) {
+  uri = uri || NetUtil.newURI("http://firefox.com/");
+  timestamp = timestamp || Date.now() * 1000;
+  await PlacesTestUtils.addVisits({
+    uri,
+    transition: transition || TRANSITION_TYPED,
+    visitDate: timestamp,
+  });
+  return [uri, timestamp];
+}
+
+add_task(async function test_visitAdded() {
+  let promiseNotify = promiseVisitAdded(async function (visit) {
+    Assert.ok(visit.visitId > 0);
+    Assert.equal(visit.url, testuri.spec);
+    Assert.equal(visit.visitTime, testtime / 1000);
+    Assert.equal(visit.referringVisitId, 0);
+    Assert.equal(visit.transitionType, TRANSITION_TYPED);
+    let uri = NetUtil.newURI(visit.url);
+    await check_guid_for_uri(uri, visit.pageGuid);
+    Assert.ok(!visit.hidden);
+    Assert.equal(visit.visitCount, 1);
+    Assert.equal(visit.typedCount, 1);
+  });
+  let testuri = NetUtil.newURI("http://firefox.com/");
+  let testtime = Date.now() * 1000;
+  await task_add_visit(testuri, testtime);
+  await promiseNotify;
+});
+
+add_task(async function test_visitAdded() {
+  let promiseNotify = promiseVisitAdded(async function (visit) {
+    Assert.ok(visit.visitId > 0);
+    Assert.equal(visit.url, testuri.spec);
+    Assert.equal(visit.visitTime, testtime / 1000);
+    Assert.equal(visit.referringVisitId, 0);
+    Assert.equal(visit.transitionType, TRANSITION_FRAMED_LINK);
+    let uri = NetUtil.newURI(visit.url);
+    await check_guid_for_uri(uri, visit.pageGuid);
+    Assert.ok(visit.hidden);
+    Assert.equal(visit.visitCount, 1);
+    Assert.equal(visit.typedCount, 0);
+  });
+  let testuri = NetUtil.newURI("http://hidden.firefox.com/");
+  let testtime = Date.now() * 1000;
+  await task_add_visit(testuri, testtime, TRANSITION_FRAMED_LINK);
+  await promiseNotify;
+});
+
+add_task(async function test_multiple_onVisit() {
+  let testuri = NetUtil.newURI("http://self.firefox.com/");
+  let promiseNotifications = new Promise(resolve => {
+    async function listener(aEvents) {
+      Assert.equal(aEvents.length, 3, "Right number of visits notified");
+      for (let i = 0; i < aEvents.length; i++) {
+        Assert.equal(aEvents[i].type, "page-visited");
+        let visit = aEvents[i];
+        Assert.equal(testuri.spec, visit.url);
+        Assert.ok(visit.visitId > 0);
+        Assert.ok(visit.visitTime > 0);
+        Assert.ok(!visit.hidden);
+        let uri = NetUtil.newURI(visit.url);
+        await check_guid_for_uri(uri, visit.pageGuid);
+        switch (i) {
+          case 0:
+            Assert.equal(visit.referringVisitId, 0);
+            Assert.equal(visit.transitionType, TRANSITION_LINK);
+            Assert.equal(visit.visitCount, 1);
+            Assert.equal(visit.typedCount, 0);
+            break;
+          case 1:
+            Assert.ok(visit.referringVisitId > 0);
+            Assert.equal(visit.transitionType, TRANSITION_LINK);
+            Assert.equal(visit.visitCount, 2);
+            Assert.equal(visit.typedCount, 0);
+            break;
+          case 2:
+            Assert.equal(visit.referringVisitId, 0);
+            Assert.equal(visit.transitionType, TRANSITION_TYPED);
+            Assert.equal(visit.visitCount, 3);
+            Assert.equal(visit.typedCount, 1);
+
+            PlacesObservers.removeListener(["page-visited"], listener);
+            resolve();
+            break;
+        }
+      }
+    }
+    PlacesObservers.addListener(["page-visited"], listener);
+  });
+  await PlacesTestUtils.addVisits([
+    { uri: testuri, transition: TRANSITION_LINK },
+    { uri: testuri, referrer: testuri, transition: TRANSITION_LINK },
+    { uri: testuri, transition: TRANSITION_TYPED },
+  ]);
+  await promiseNotifications;
+});
+
+add_task(async function test_pageRemovedFromStore() {
+  let [testuri] = await task_add_visit();
+  let testguid = await PlacesTestUtils.getDatabaseValue("moz_places", "guid", {
+    url: testuri,
+  });
+
+  const promiseNotify = PlacesTestUtils.waitForNotification("page-removed");
+
+  await PlacesUtils.history.remove(testuri);
+
+  const events = await promiseNotify;
+  Assert.equal(events.length, 1, "Right number of page-removed notified");
+  Assert.equal(events[0].type, "page-removed");
+  Assert.ok(events[0].isRemovedFromStore);
+  Assert.equal(events[0].url, testuri.spec);
+  Assert.equal(events[0].pageGuid, testguid);
+  Assert.equal(events[0].reason, PlacesVisitRemoved.REASON_DELETED);
+});
+
+add_task(async function test_pageRemovedAllVisits() {
+  const promiseNotify = PlacesTestUtils.waitForNotification("page-removed");
+
+  let msecs24hrsAgo = Date.now() - 86400 * 1000;
+  let [testuri] = await task_add_visit(undefined, msecs24hrsAgo * 1000);
+  // Add a bookmark so the page is not removed.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "test",
+    url: testuri,
+  });
+  let testguid = await PlacesTestUtils.getDatabaseValue("moz_places", "guid", {
+    url: testuri,
+  });
+  await PlacesUtils.history.remove(testuri);
+
+  const events = await promiseNotify;
+  Assert.equal(events.length, 1, "Right number of page-removed notified");
+  Assert.equal(events[0].type, "page-removed");
+  Assert.ok(!events[0].isRemovedFromStore);
+  Assert.equal(events[0].url, testuri.spec);
+  // Can't use do_check_guid_for_uri() here because the visit is already gone.
+  Assert.equal(events[0].pageGuid, testguid);
+  Assert.equal(events[0].reason, PlacesVisitRemoved.REASON_DELETED);
+  Assert.ok(!events[0].isPartialVisistsRemoval); // All visits have been removed.
+});
+
+add_task(async function test_pageTitleChanged() {
+  const [testuri] = await task_add_visit();
+  const title = "test-title";
+
+  const promiseNotify =
+    PlacesTestUtils.waitForNotification("page-title-changed");
+
+  await PlacesTestUtils.addVisits({
+    uri: testuri,
+    title,
+  });
+
+  const events = await promiseNotify;
+  Assert.equal(events.length, 1, "Right number of title changed notified");
+  Assert.equal(events[0].type, "page-title-changed");
+  Assert.equal(events[0].url, testuri.spec);
+  Assert.equal(events[0].title, title);
+  await check_guid_for_uri(testuri, events[0].pageGuid);
+});
diff --git a/toolkit/components/places/tests/unit/test_history_sidebar.js b/toolkit/components/places/tests/unit/test_history_sidebar.js
new file mode 100644
index 0000000000..868ef79f70
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_history_sidebar.js
@@ -0,0 +1,418 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+let nowObj = new Date();
+
+/**
+ * Normalizes a Date to midnight.
+ *
+ * @param {Date} inputDate
+ * @return normalized Date
+ */
+function toMidnight(inputDate) {
+  let date = new Date(inputDate);
+  date.setHours(0);
+  date.setMinutes(0);
+  date.setSeconds(0);
+  date.setMilliseconds(0);
+  return date;
+}
+
+/**
+ * Adds a test URI visit to the database.
+ *
+ * @param aURI
+ *        The URI to add a visit for.
+ * @param aTime
+ *        Reference "now" time.
+ * @param aDayOffset
+ *        number of days to add, pass a negative value to subtract them.
+ */
+async function addNormalizedVisit(aURI, aTime, aDayOffset) {
+  let dateObj = toMidnight(aTime);
+  // Days where DST changes should be taken into account.
+  let previousDateObj = new Date(dateObj.getTime() + aDayOffset * 86400000);
+  let DSTCorrection =
+    (dateObj.getTimezoneOffset() - previousDateObj.getTimezoneOffset()) *
+    60 *
+    1000;
+  // Substract aDayOffset
+  let PRTimeWithOffset = (previousDateObj.getTime() - DSTCorrection) * 1000;
+  info(
+    "Adding visit to " +
+      aURI.spec +
+      " at " +
+      PlacesUtils.toDate(PRTimeWithOffset)
+  );
+  await PlacesTestUtils.addVisits({
+    uri: aURI,
+    visitDate: PRTimeWithOffset,
+  });
+}
+
+function openRootForResultType(resultType) {
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.resultType = resultType;
+  let query = PlacesUtils.history.getNewQuery();
+  let result = PlacesUtils.history.executeQuery(query, options);
+  let root = result.root;
+  root.containerOpen = true;
+  return result;
+}
+
+function daysForMonthsAgo(months) {
+  let oldTime = toMidnight(new Date());
+  // Set day before month, otherwise we could try to calculate 30 February, or
+  // other nonexistent days.
+  oldTime.setDate(1);
+  oldTime.setMonth(nowObj.getMonth() - months);
+  // Stay larger for eventual timezone issues, add 2 days.
+  return parseInt((nowObj - oldTime) / (1000 * 60 * 60 * 24)) + 2;
+}
+
+// This test relies on en-US locale
+// Offset is number of days
+let containers = [
+  { label: "Today", offset: 0, visible: true },
+  { label: "Yesterday", offset: -1, visible: true },
+  { label: "Last 7 days", offset: -2, visible: true },
+  { label: "This month", offset: -8, visible: nowObj.getDate() > 8 },
+  { label: "", offset: -daysForMonthsAgo(0), visible: true },
+  { label: "", offset: -daysForMonthsAgo(1), visible: true },
+  { label: "", offset: -daysForMonthsAgo(2), visible: true },
+  { label: "", offset: -daysForMonthsAgo(3), visible: true },
+  { label: "", offset: -daysForMonthsAgo(4), visible: true },
+  { label: "Older than 6 months", offset: -daysForMonthsAgo(5), visible: true },
+];
+
+let visibleContainers = containers.filter(container => container.visible);
+
+/**
+ * Asynchronous task that fills history and checks containers' labels.
+ */
+add_task(async function task_fill_history() {
+  info("*** TEST Fill History");
+  // We can't use "now" because our hardcoded offsets would be invalid for some
+  // date.  So we hardcode a date.
+  for (let i = 0; i < containers.length; i++) {
+    let container = containers[i];
+    let testURI = uri("http://mirror" + i + ".mozilla.com/b");
+    await addNormalizedVisit(testURI, nowObj, container.offset);
+    testURI = uri("http://mirror" + i + ".mozilla.com/a");
+    await addNormalizedVisit(testURI, nowObj, container.offset);
+    testURI = uri("http://mirror" + i + ".google.com/b");
+    await addNormalizedVisit(testURI, nowObj, container.offset);
+    testURI = uri("http://mirror" + i + ".google.com/a");
+    await addNormalizedVisit(testURI, nowObj, container.offset);
+    // Bug 485703 - Hide date containers not containing additional entries
+    //              compared to previous ones.
+    // Check after every new container is added.
+    check_visit(container.offset);
+  }
+
+  let root = openRootForResultType(
+    Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_SITE_QUERY
+  ).root;
+  let cc = root.childCount;
+  info("Found containers:");
+  let previousLabels = [];
+  for (let i = 0; i < cc; i++) {
+    let container = visibleContainers[i];
+    let node = root.getChild(i);
+    info(node.title);
+    if (container.label) {
+      Assert.equal(node.title, container.label);
+    }
+    // Check labels are not repeated.
+    Assert.ok(!previousLabels.includes(node.title));
+    previousLabels.push(node.title);
+  }
+  Assert.equal(cc, visibleContainers.length);
+  root.containerOpen = false;
+});
+
+/**
+ * Bug 485703 - Hide date containers not containing additional entries compared
+ *              to previous ones.
+ */
+function check_visit(aOffset) {
+  let root = openRootForResultType(
+    Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_SITE_QUERY
+  ).root;
+
+  let unexpected = [];
+  switch (aOffset) {
+    case 0:
+      unexpected = ["Yesterday", "Last 7 days", "This month"];
+      break;
+    case -1:
+      unexpected = ["Last 7 days", "This month"];
+      break;
+    case -2:
+      unexpected = ["This month"];
+      break;
+    default:
+    // Other containers are tested later.
+  }
+
+  info("Found containers:");
+  let cc = root.childCount;
+  for (let i = 0; i < cc; i++) {
+    let node = root.getChild(i);
+    info(node.title);
+    Assert.ok(!unexpected.includes(node.title));
+  }
+  root.containerOpen = false;
+}
+
+/**
+ * Queries history grouped by date and site, checking containers' labels and
+ * children.
+ */
+add_task(async function test_RESULTS_AS_DATE_SITE_QUERY() {
+  info("*** TEST RESULTS_AS_DATE_SITE_QUERY");
+  let result = openRootForResultType(
+    Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_SITE_QUERY
+  );
+  let root = result.root;
+
+  // Check one of the days
+  let dayNode = PlacesUtils.asContainer(root.getChild(0));
+  dayNode.containerOpen = true;
+  Assert.equal(dayNode.childCount, 2);
+
+  // Items should be sorted by host
+  let site1 = PlacesUtils.asContainer(dayNode.getChild(0));
+  Assert.equal(site1.title, "mirror0.google.com");
+
+  let site2 = PlacesUtils.asContainer(dayNode.getChild(1));
+  Assert.equal(site2.title, "mirror0.mozilla.com");
+
+  site1.containerOpen = true;
+  Assert.equal(site1.childCount, 2);
+
+  // Inside of host sites are sorted by title
+  let site1visit = site1.getChild(0);
+  Assert.equal(site1visit.uri, "http://mirror0.google.com/a");
+
+  // Bug 473157: changing sorting mode should not affect the containers
+  result.sortingMode = Ci.nsINavHistoryQueryOptions.SORT_BY_TITLE_DESCENDING;
+
+  // Check one of the days
+  dayNode = PlacesUtils.asContainer(root.getChild(0));
+  dayNode.containerOpen = true;
+  Assert.equal(dayNode.childCount, 2);
+
+  // Hosts are still sorted by title
+  site1 = PlacesUtils.asContainer(dayNode.getChild(0));
+  Assert.equal(site1.title, "mirror0.google.com");
+
+  site2 = PlacesUtils.asContainer(dayNode.getChild(1));
+  Assert.equal(site2.title, "mirror0.mozilla.com");
+
+  site1.containerOpen = true;
+  Assert.equal(site1.childCount, 2);
+
+  // But URLs are now sorted by title descending
+  site1visit = site1.getChild(0);
+  Assert.equal(site1visit.uri, "http://mirror0.google.com/b");
+
+  site1.containerOpen = false;
+  dayNode.containerOpen = false;
+  root.containerOpen = false;
+});
+
+/**
+ * Queries history grouped by date, checking containers' labels and children.
+ */
+add_task(async function test_RESULTS_AS_DATE_QUERY() {
+  info("*** TEST RESULTS_AS_DATE_QUERY");
+  let result = openRootForResultType(
+    Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_QUERY
+  );
+  let root = result.root;
+  let cc = root.childCount;
+  Assert.equal(cc, visibleContainers.length);
+  info("Found containers:");
+  for (let i = 0; i < cc; i++) {
+    let container = visibleContainers[i];
+    let node = root.getChild(i);
+    info(node.title);
+    if (container.label) {
+      Assert.equal(node.title, container.label);
+    }
+  }
+
+  // Check one of the days
+  let dayNode = PlacesUtils.asContainer(root.getChild(0));
+  dayNode.containerOpen = true;
+  Assert.equal(dayNode.childCount, 4);
+
+  // Items should be sorted by title
+  let visit1 = dayNode.getChild(0);
+  Assert.equal(visit1.uri, "http://mirror0.google.com/a");
+
+  let visit2 = dayNode.getChild(3);
+  Assert.equal(visit2.uri, "http://mirror0.mozilla.com/b");
+
+  // Bug 473157: changing sorting mode should not affect the containers
+  result.sortingMode = Ci.nsINavHistoryQueryOptions.SORT_BY_TITLE_DESCENDING;
+
+  // Check one of the days
+  dayNode = PlacesUtils.asContainer(root.getChild(0));
+  dayNode.containerOpen = true;
+  Assert.equal(dayNode.childCount, 4);
+
+  // But URLs are now sorted by title descending
+  visit1 = dayNode.getChild(0);
+  Assert.equal(visit1.uri, "http://mirror0.mozilla.com/b");
+
+  visit2 = dayNode.getChild(3);
+  Assert.equal(visit2.uri, "http://mirror0.google.com/a");
+
+  dayNode.containerOpen = false;
+  root.containerOpen = false;
+});
+
+/**
+ * Queries history grouped by site, checking containers' labels and children.
+ */
+add_task(async function test_RESULTS_AS_SITE_QUERY() {
+  info("*** TEST RESULTS_AS_SITE_QUERY");
+  // add a bookmark with a domain not in the set of visits in the db
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    url: "http://foobar",
+    title: "",
+  });
+
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.resultType = options.RESULTS_AS_SITE_QUERY;
+  options.sortingMode = options.SORT_BY_TITLE_ASCENDING;
+  let query = PlacesUtils.history.getNewQuery();
+  let result = PlacesUtils.history.executeQuery(query, options);
+  let root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, containers.length * 2);
+
+  // Expected results:
+  //   "mirror0.google.com",
+  //   "mirror0.mozilla.com",
+  //   "mirror1.google.com",
+  //   "mirror1.mozilla.com",
+  //   "mirror2.google.com",
+  //   "mirror2.mozilla.com",
+  //   "mirror3.google.com",  <== We check for this site (index 6)
+  //   "mirror3.mozilla.com",
+  //   "mirror4.google.com",
+  //   "mirror4.mozilla.com",
+  //   "mirror5.google.com",
+  //   "mirror5.mozilla.com",
+  //   ...
+
+  // Items should be sorted by host
+  let siteNode = PlacesUtils.asContainer(root.getChild(6));
+  Assert.equal(siteNode.title, "mirror3.google.com");
+
+  siteNode.containerOpen = true;
+  Assert.equal(siteNode.childCount, 2);
+
+  // Inside of host sites are sorted by title
+  let visitNode = siteNode.getChild(0);
+  Assert.equal(visitNode.uri, "http://mirror3.google.com/a");
+
+  // Bug 473157: changing sorting mode should not affect the containers
+  result.sortingMode = options.SORT_BY_TITLE_DESCENDING;
+  siteNode = PlacesUtils.asContainer(root.getChild(6));
+  Assert.equal(siteNode.title, "mirror3.google.com");
+
+  siteNode.containerOpen = true;
+  Assert.equal(siteNode.childCount, 2);
+
+  // But URLs are now sorted by title descending
+  let visit = siteNode.getChild(0);
+  Assert.equal(visit.uri, "http://mirror3.google.com/b");
+
+  siteNode.containerOpen = false;
+  root.containerOpen = false;
+
+  // Cleanup.
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+});
+
+/**
+ * Checks that queries grouped by date do liveupdate correctly.
+ */
+async function test_date_liveupdate(aResultType) {
+  let midnight = toMidnight(nowObj);
+
+  // TEST 1. Test that the query correctly updates when it is root.
+  let root = openRootForResultType(aResultType).root;
+  Assert.equal(root.childCount, visibleContainers.length);
+
+  // Remove "Today".
+  await PlacesUtils.history.removeByFilter({
+    beginDate: new Date(midnight.getTime()),
+    endDate: new Date(Date.now()),
+  });
+  Assert.equal(root.childCount, visibleContainers.length - 1);
+
+  // Open "Last 7 days" container, this way we will have a container accepting
+  // the new visit, but we should still add back "Today" container.
+  let last7Days = PlacesUtils.asContainer(root.getChild(1));
+  last7Days.containerOpen = true;
+
+  // Add a visit for "Today".  This should add back the missing "Today"
+  // container.
+  await addNormalizedVisit(uri("http://www.mozilla.org/"), nowObj, 0);
+  Assert.equal(root.childCount, visibleContainers.length);
+
+  last7Days.containerOpen = false;
+  root.containerOpen = false;
+
+  // TEST 2. Test that the query correctly updates even if it is not root.
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    url: "place:type=" + aResultType,
+    title: "",
+  });
+
+  // Query toolbar and open our query container, then check again liveupdate.
+  root = PlacesUtils.getFolderContents(PlacesUtils.bookmarks.toolbarGuid).root;
+  Assert.equal(root.childCount, 1);
+  let dateContainer = PlacesUtils.asContainer(root.getChild(0));
+  dateContainer.containerOpen = true;
+
+  Assert.equal(dateContainer.childCount, visibleContainers.length);
+  // Remove "Today".
+  await PlacesUtils.history.removeByFilter({
+    beginDate: new Date(midnight.getTime()),
+    endDate: new Date(Date.now()),
+  });
+  Assert.equal(dateContainer.childCount, visibleContainers.length - 1);
+  // Add a visit for "Today".
+  await addNormalizedVisit(uri("http://www.mozilla.org/"), nowObj, 0);
+  Assert.equal(dateContainer.childCount, visibleContainers.length);
+
+  dateContainer.containerOpen = false;
+  root.containerOpen = false;
+
+  // Cleanup.
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+}
+
+add_task(async function test_history_sidebar() {
+  await test_date_liveupdate(
+    Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_SITE_QUERY
+  );
+  await test_date_liveupdate(
+    Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_QUERY
+  );
+
+  // The remaining views are
+  //   RESULTS_AS_URI + SORT_BY_VISITCOUNT_DESCENDING
+  //   ->  test_399266.js
+  //   RESULTS_AS_URI + SORT_BY_DATE_DESCENDING
+  //   ->  test_385397.js
+});
diff --git a/toolkit/components/places/tests/unit/test_import_mobile_bookmarks.js b/toolkit/components/places/tests/unit/test_import_mobile_bookmarks.js
new file mode 100644
index 0000000000..167b8786e4
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_import_mobile_bookmarks.js
@@ -0,0 +1,326 @@
+async function importFromFixture(fixture, replace) {
+  let cwd = do_get_cwd().path;
+  let path = PathUtils.join(cwd, fixture);
+
+  info(`Importing from ${path}`);
+  await BookmarkJSONUtils.importFromFile(path, { replace });
+  await PlacesTestUtils.promiseAsyncUpdates();
+}
+
+async function treeEquals(guid, expected, message) {
+  let root = await PlacesUtils.promiseBookmarksTree(guid);
+  let bookmarks = (function nodeToEntry(node) {
+    let entry = { guid: node.guid, index: node.index };
+    if (node.children) {
+      entry.children = node.children.map(nodeToEntry);
+    }
+    return entry;
+  })(root);
+
+  info(`Checking if ${guid} tree matches ${JSON.stringify(expected)}`);
+  info(`Got bookmarks tree for ${guid}: ${JSON.stringify(bookmarks)}`);
+
+  deepEqual(bookmarks, expected, message);
+}
+
+add_task(async function test_restore_mobile_bookmarks_root() {
+  await importFromFixture(
+    "mobile_bookmarks_root_import.json",
+    /* replace */ true
+  );
+
+  await treeEquals(
+    PlacesUtils.bookmarks.rootGuid,
+    {
+      guid: PlacesUtils.bookmarks.rootGuid,
+      index: 0,
+      children: [
+        {
+          guid: PlacesUtils.bookmarks.menuGuid,
+          index: 0,
+          children: [{ guid: "X6lUyOspVYwi", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.toolbarGuid,
+          index: 1,
+        },
+        {
+          guid: PlacesUtils.bookmarks.unfiledGuid,
+          index: 3,
+        },
+        {
+          guid: PlacesUtils.bookmarks.mobileGuid,
+          index: 4,
+          children: [
+            { guid: "_o8e1_zxTJFg", index: 0 },
+            { guid: "QCtSqkVYUbXB", index: 1 },
+          ],
+        },
+      ],
+    },
+    "Should restore mobile bookmarks from root"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_import_mobile_bookmarks_root() {
+  await importFromFixture(
+    "mobile_bookmarks_root_import.json",
+    /* replace */ false
+  );
+  await importFromFixture(
+    "mobile_bookmarks_root_merge.json",
+    /* replace */ false
+  );
+
+  await treeEquals(
+    PlacesUtils.bookmarks.rootGuid,
+    {
+      guid: PlacesUtils.bookmarks.rootGuid,
+      index: 0,
+      children: [
+        {
+          guid: PlacesUtils.bookmarks.menuGuid,
+          index: 0,
+          children: [
+            { guid: "X6lUyOspVYwi", index: 0 },
+            { guid: "Utodo9b0oVws", index: 1 },
+          ],
+        },
+        {
+          guid: PlacesUtils.bookmarks.toolbarGuid,
+          index: 1,
+        },
+        {
+          guid: PlacesUtils.bookmarks.unfiledGuid,
+          index: 3,
+        },
+        {
+          guid: PlacesUtils.bookmarks.mobileGuid,
+          index: 4,
+          children: [
+            // The first two are in ..._import.json, the second two are in
+            // ..._merge.json
+            { guid: "_o8e1_zxTJFg", index: 0 },
+            { guid: "QCtSqkVYUbXB", index: 1 },
+            { guid: "a17yW6-nTxEJ", index: 2 },
+            { guid: "xV10h9Wi3FBM", index: 3 },
+          ],
+        },
+      ],
+    },
+    "Should merge bookmarks root contents"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_restore_mobile_bookmarks_folder() {
+  // This tests importing a mobile bookmarks folder with the annotation,
+  // and the old, random guid.
+  await importFromFixture(
+    "mobile_bookmarks_folder_import.json",
+    /* replace */ true
+  );
+
+  await treeEquals(
+    PlacesUtils.bookmarks.rootGuid,
+    {
+      guid: PlacesUtils.bookmarks.rootGuid,
+      index: 0,
+      children: [
+        {
+          guid: PlacesUtils.bookmarks.menuGuid,
+          index: 0,
+          children: [
+            { guid: "X6lUyOspVYwi", index: 0 },
+            { guid: "XF4yRP6bTuil", index: 1 },
+          ],
+        },
+        {
+          guid: PlacesUtils.bookmarks.toolbarGuid,
+          index: 1,
+          children: [{ guid: "buy7711R3ZgE", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.unfiledGuid,
+          index: 3,
+          children: [{ guid: "KIa9iKZab2Z5", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.mobileGuid,
+          index: 4,
+          children: [
+            { guid: "_o8e1_zxTJFg", index: 0 },
+            { guid: "QCtSqkVYUbXB", index: 1 },
+          ],
+        },
+      ],
+    },
+    "Should restore mobile bookmark folder contents into mobile root"
+  );
+
+  let queryById = await PlacesUtils.bookmarks.fetch("XF4yRP6bTuil");
+  equal(
+    queryById.url.href,
+    `place:parent=${PlacesUtils.bookmarks.mobileGuid}`,
+    "Should rewrite mobile query to point to root GUID"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_import_mobile_bookmarks_folder() {
+  await importFromFixture(
+    "mobile_bookmarks_folder_import.json",
+    /* replace */ false
+  );
+  await importFromFixture(
+    "mobile_bookmarks_folder_merge.json",
+    /* replace */ false
+  );
+
+  await treeEquals(
+    PlacesUtils.bookmarks.rootGuid,
+    {
+      guid: PlacesUtils.bookmarks.rootGuid,
+      index: 0,
+      children: [
+        {
+          guid: PlacesUtils.bookmarks.menuGuid,
+          index: 0,
+          children: [
+            { guid: "X6lUyOspVYwi", index: 0 },
+            { guid: "XF4yRP6bTuil", index: 1 },
+            { guid: "Utodo9b0oVws", index: 2 },
+          ],
+        },
+        {
+          guid: PlacesUtils.bookmarks.toolbarGuid,
+          index: 1,
+          children: [{ guid: "buy7711R3ZgE", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.unfiledGuid,
+          index: 3,
+          children: [{ guid: "KIa9iKZab2Z5", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.mobileGuid,
+          index: 4,
+          children: [
+            { guid: "_o8e1_zxTJFg", index: 0 },
+            { guid: "QCtSqkVYUbXB", index: 1 },
+            { guid: "a17yW6-nTxEJ", index: 2 },
+            { guid: "xV10h9Wi3FBM", index: 3 },
+          ],
+        },
+      ],
+    },
+    "Should merge bookmarks folder contents into mobile root"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_restore_multiple_bookmarks_folders() {
+  await importFromFixture(
+    "mobile_bookmarks_multiple_folders.json",
+    /* replace */ true
+  );
+
+  await treeEquals(
+    PlacesUtils.bookmarks.rootGuid,
+    {
+      guid: PlacesUtils.bookmarks.rootGuid,
+      index: 0,
+      children: [
+        {
+          guid: PlacesUtils.bookmarks.menuGuid,
+          index: 0,
+          children: [
+            { guid: "buy7711R3ZgE", index: 0 },
+            { guid: "F_LBgd1fS_uQ", index: 1 },
+            { guid: "oIpmQXMWsXvY", index: 2 },
+          ],
+        },
+        {
+          guid: PlacesUtils.bookmarks.toolbarGuid,
+          index: 1,
+          children: [{ guid: "Utodo9b0oVws", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.unfiledGuid,
+          index: 3,
+          children: [{ guid: "xV10h9Wi3FBM", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.mobileGuid,
+          index: 4,
+          children: [
+            { guid: "a17yW6-nTxEJ", index: 0 },
+            { guid: "sSZ86WT9WbN3", index: 1 },
+          ],
+        },
+      ],
+    },
+    "Should restore multiple bookmarks folder contents into root"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_import_multiple_bookmarks_folders() {
+  await importFromFixture(
+    "mobile_bookmarks_root_import.json",
+    /* replace */ false
+  );
+  await importFromFixture(
+    "mobile_bookmarks_multiple_folders.json",
+    /* replace */ false
+  );
+
+  await treeEquals(
+    PlacesUtils.bookmarks.rootGuid,
+    {
+      guid: PlacesUtils.bookmarks.rootGuid,
+      index: 0,
+      children: [
+        {
+          guid: PlacesUtils.bookmarks.menuGuid,
+          index: 0,
+          children: [
+            { guid: "X6lUyOspVYwi", index: 0 },
+            { guid: "buy7711R3ZgE", index: 1 },
+            { guid: "F_LBgd1fS_uQ", index: 2 },
+            { guid: "oIpmQXMWsXvY", index: 3 },
+          ],
+        },
+        {
+          guid: PlacesUtils.bookmarks.toolbarGuid,
+          index: 1,
+          children: [{ guid: "Utodo9b0oVws", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.unfiledGuid,
+          index: 3,
+          children: [{ guid: "xV10h9Wi3FBM", index: 0 }],
+        },
+        {
+          guid: PlacesUtils.bookmarks.mobileGuid,
+          index: 4,
+          children: [
+            { guid: "_o8e1_zxTJFg", index: 0 },
+            { guid: "QCtSqkVYUbXB", index: 1 },
+            { guid: "a17yW6-nTxEJ", index: 2 },
+            { guid: "sSZ86WT9WbN3", index: 3 },
+          ],
+        },
+      ],
+    },
+    "Should merge multiple mobile folders into root"
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
diff --git a/toolkit/components/places/tests/unit/test_isPageInDB.js b/toolkit/components/places/tests/unit/test_isPageInDB.js
new file mode 100644
index 0000000000..2eda125994
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_isPageInDB.js
@@ -0,0 +1,10 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+
+add_task(async function test_execute() {
+  var good_uri = uri("http://mozilla.com");
+  var bad_uri = uri("http://google.com");
+  await PlacesTestUtils.addVisits({ uri: good_uri });
+  Assert.ok(await PlacesTestUtils.isPageInDB(good_uri));
+  Assert.equal(false, await PlacesTestUtils.isPageInDB(bad_uri));
+});
diff --git a/toolkit/components/places/tests/unit/test_isURIVisited.js b/toolkit/components/places/tests/unit/test_isURIVisited.js
new file mode 100644
index 0000000000..ac40e5fba6
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_isURIVisited.js
@@ -0,0 +1,73 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests functionality of the isURIVisited API.
+
+const SCHEMES = {
+  "http://": true,
+  "https://": true,
+  "ftp://": true,
+  "file:///": true,
+  "about:": false,
+  // nsIIOService.newURI() can throw if e.g. the app knows about imap://
+  // but the account is not set up and so the URL is invalid for it.
+  //  "imap://": false,
+  "news://": false,
+  "mailbox:": false,
+  "cached-favicon:http://": false,
+  "view-source:http://": false,
+  "chrome://browser/content/browser.xhtml?": false,
+  "resource://": false,
+  "data:,": false,
+  "javascript:": false,
+};
+
+add_task(async function test_isURIVisited() {
+  let history = Cc["@mozilla.org/browser/history;1"].getService(
+    Ci.mozIAsyncHistory
+  );
+
+  function visitsPromise(uri) {
+    return new Promise(resolve => {
+      history.isURIVisited(uri, (receivedURI, visited) => {
+        resolve([receivedURI, visited]);
+      });
+    });
+  }
+
+  for (let scheme in SCHEMES) {
+    info("Testing scheme " + scheme);
+    for (let t in PlacesUtils.history.TRANSITIONS) {
+      if (t == "EMBED") {
+        continue;
+      }
+      info("With transition " + t);
+      let aTransition = PlacesUtils.history.TRANSITIONS[t];
+
+      let aURI = Services.io.newURI(scheme + "mozilla.org/");
+
+      let [receivedURI1, visited1] = await visitsPromise(aURI);
+      Assert.ok(aURI.equals(receivedURI1));
+      Assert.ok(!visited1);
+
+      if (PlacesUtils.history.canAddURI(aURI)) {
+        await PlacesTestUtils.addVisits([
+          {
+            uri: aURI,
+            transition: aTransition,
+          },
+        ]);
+        info("Added visit for " + aURI.spec);
+      }
+
+      let [receivedURI2, visited2] = await visitsPromise(aURI);
+      Assert.ok(aURI.equals(receivedURI2));
+      Assert.equal(SCHEMES[scheme], visited2);
+
+      await PlacesUtils.history.clear();
+      let [receivedURI3, visited3] = await visitsPromise(aURI);
+      Assert.ok(aURI.equals(receivedURI3));
+      Assert.ok(!visited3);
+    }
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_isvisited.js b/toolkit/components/places/tests/unit/test_isvisited.js
new file mode 100644
index 0000000000..7271ef7903
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_isvisited.js
@@ -0,0 +1,69 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+add_task(async function test_execute() {
+  var referrer = uri("about:blank");
+
+  // add a http:// uri
+  var uri1 = uri("http://mozilla.com");
+  await PlacesTestUtils.addVisits({ uri: uri1, referrer });
+  await check_guid_for_uri(uri1);
+  Assert.ok(await PlacesUtils.history.hasVisits(uri1));
+
+  // add a https:// uri
+  var uri2 = uri("https://etrade.com");
+  await PlacesTestUtils.addVisits({ uri: uri2, referrer });
+  await check_guid_for_uri(uri2);
+  Assert.ok(await PlacesUtils.history.hasVisits(uri2));
+
+  // add a ftp:// uri
+  var uri3 = uri("ftp://ftp.mozilla.org");
+  await PlacesTestUtils.addVisits({ uri: uri3, referrer });
+  await check_guid_for_uri(uri3);
+  Assert.ok(await PlacesUtils.history.hasVisits(uri3));
+
+  // check if a nonexistent uri is visited
+  var uri4 = uri("http://foobarcheese.com");
+  Assert.equal(false, await PlacesUtils.history.hasVisits(uri4));
+
+  // check that certain schemes never show up as visited
+  // even if we attempt to add them to history
+  // see CanAddURI() in nsNavHistory.cpp
+  const URLS = [
+    "about:config",
+    "imap://cyrus.andrew.cmu.edu/archive.imap",
+    "news://new.mozilla.org/mozilla.dev.apps.firefox",
+    "mailbox:Inbox",
+    "cached-favicon:http://mozilla.org/made-up-favicon",
+    "view-source:http://mozilla.org",
+    "chrome://browser/content/browser.xhtml",
+    "resource://gre-resources/hiddenWindow.html",
+    "data:,Hello%2C%20World!",
+    "javascript:alert('hello wolrd!');",
+    "http://localhost/" + "a".repeat(1984),
+  ];
+  for (let currentURL of URLS) {
+    try {
+      var cantAddUri = uri(currentURL);
+    } catch (e) {
+      // nsIIOService.newURI() can throw if e.g. our app knows about imap://
+      // but the account is not set up and so the URL is invalid for us.
+      // Note this in the log but ignore as it's not the subject of this test.
+      info("Could not construct URI for '" + currentURL + "'; ignoring");
+    }
+    if (cantAddUri) {
+      PlacesTestUtils.addVisits({ uri: cantAddUri, referrer }).then(
+        () => {
+          do_throw("Should not have added history for invalid URI.");
+        },
+        error => {
+          Assert.ok(error.message.includes("No items were added to history"));
+        }
+      );
+      Assert.equal(false, await PlacesUtils.history.hasVisits(cantAddUri));
+    }
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_keywords.js b/toolkit/components/places/tests/unit/test_keywords.js
new file mode 100644
index 0000000000..8ee3ecafe2
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_keywords.js
@@ -0,0 +1,733 @@
+"use strict";
+
+ChromeUtils.defineESModuleGetters(this, {
+  Preferences: "resource://gre/modules/Preferences.sys.mjs",
+});
+
+async function check_keyword(aExpectExists, aHref, aKeyword, aPostData = null) {
+  // Check case-insensitivity.
+  aKeyword = aKeyword.toUpperCase();
+
+  let entry = await PlacesUtils.keywords.fetch(aKeyword);
+
+  Assert.deepEqual(
+    entry,
+    await PlacesUtils.keywords.fetch({ keyword: aKeyword })
+  );
+
+  if (aExpectExists) {
+    Assert.ok(!!entry, "A keyword should exist");
+    Assert.equal(entry.url.href, aHref);
+    Assert.equal(entry.postData, aPostData);
+    Assert.deepEqual(
+      entry,
+      await PlacesUtils.keywords.fetch({ keyword: aKeyword, url: aHref })
+    );
+    let entries = [];
+    await PlacesUtils.keywords.fetch({ url: aHref }, e => entries.push(e));
+    Assert.ok(
+      entries.some(
+        e => e.url.href == aHref && e.keyword == aKeyword.toLowerCase()
+      )
+    );
+  } else {
+    Assert.ok(
+      !entry || entry.url.href != aHref,
+      "The given keyword entry should not exist"
+    );
+    if (aHref) {
+      Assert.equal(
+        null,
+        await PlacesUtils.keywords.fetch({ keyword: aKeyword, url: aHref })
+      );
+    } else {
+      Assert.equal(
+        null,
+        await PlacesUtils.keywords.fetch({ keyword: aKeyword })
+      );
+    }
+  }
+}
+
+/**
+ * Polls the keywords cache waiting for the given keyword entry.
+ */
+async function promiseKeyword(keyword, expectedHref) {
+  let href = null;
+  do {
+    await new Promise(resolve => do_timeout(100, resolve));
+    let entry = await PlacesUtils.keywords.fetch(keyword);
+    if (entry) {
+      href = entry.url.href;
+    }
+  } while (href != expectedHref);
+}
+
+async function check_no_orphans() {
+  let db = await PlacesUtils.promiseDBConnection();
+  let rows = await db.executeCached(
+    `SELECT id FROM moz_keywords k
+     WHERE NOT EXISTS (SELECT 1 FROM moz_places WHERE id = k.place_id)
+    `
+  );
+  Assert.equal(rows.length, 0);
+}
+
+function expectBookmarkNotifications() {
+  const observer = {
+    notifications: [],
+    _start() {
+      this._handle = this._handle.bind(this);
+      PlacesUtils.observers.addListener(
+        ["bookmark-keyword-changed"],
+        this._handle
+      );
+    },
+    _handle(events) {
+      for (const event of events) {
+        this.notifications.push({
+          type: event.type,
+          id: event.id,
+          itemType: event.itemType,
+          url: event.url,
+          guid: event.guid,
+          parentGuid: event.parentGuid,
+          keyword: event.keyword,
+          lastModified: new Date(event.lastModified),
+          source: event.source,
+          isTagging: event.isTagging,
+        });
+      }
+    },
+    check(expected) {
+      PlacesUtils.observers.removeListener(
+        ["bookmark-keyword-changed"],
+        this._handle
+      );
+      Assert.deepEqual(this.notifications, expected);
+    },
+  };
+  observer._start();
+  return observer;
+}
+
+add_task(async function test_invalid_input() {
+  Assert.throws(() => PlacesUtils.keywords.fetch(null), /Invalid keyword/);
+  Assert.throws(() => PlacesUtils.keywords.fetch(5), /Invalid keyword/);
+  Assert.throws(() => PlacesUtils.keywords.fetch(undefined), /Invalid keyword/);
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({ keyword: null }),
+    /Invalid keyword/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({ keyword: {} }),
+    /Invalid keyword/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({ keyword: 5 }),
+    /Invalid keyword/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({}),
+    /At least keyword or url must be provided/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({ keyword: "test" }, "test"),
+    /onResult callback must be a valid function/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({ url: "test" }),
+    /is not a valid URL/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({ url: {} }),
+    /is not a valid URL/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({ url: null }),
+    /is not a valid URL/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.fetch({ url: "" }),
+    /is not a valid URL/
+  );
+
+  Assert.throws(
+    () => PlacesUtils.keywords.insert(null),
+    /Input should be a valid object/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert("test"),
+    /Input should be a valid object/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert(undefined),
+    /Input should be a valid object/
+  );
+  Assert.throws(() => PlacesUtils.keywords.insert({}), /Invalid keyword/);
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: null }),
+    /Invalid keyword/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: 5 }),
+    /Invalid keyword/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: "" }),
+    /Invalid keyword/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: "test", postData: 5 }),
+    /Invalid POST data/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: "test", postData: {} }),
+    /Invalid POST data/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: "test" }),
+    /is not a valid URL/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: "test", url: 5 }),
+    /is not a valid URL/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: "test", url: "" }),
+    /is not a valid URL/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: "test", url: null }),
+    /is not a valid URL/
+  );
+  Assert.throws(
+    () => PlacesUtils.keywords.insert({ keyword: "test", url: "mozilla" }),
+    /is not a valid URL/
+  );
+
+  Assert.throws(() => PlacesUtils.keywords.remove(null), /Invalid keyword/);
+  Assert.throws(() => PlacesUtils.keywords.remove(""), /Invalid keyword/);
+  Assert.throws(() => PlacesUtils.keywords.remove(5), /Invalid keyword/);
+});
+
+add_task(async function test_addKeyword() {
+  await check_keyword(false, "http://example.com/", "keyword");
+  let fc = await foreign_count("http://example.com/");
+  let observer = expectBookmarkNotifications();
+
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example.com/",
+  });
+  observer.check([]);
+
+  await check_keyword(true, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 1); // +1 keyword
+
+  // Now remove the keyword.
+  observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.remove("keyword");
+  observer.check([]);
+
+  await check_keyword(false, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc); // -1 keyword
+
+  // Check using URL.
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: new URL("http://example.com/"),
+  });
+  await check_keyword(true, "http://example.com/", "keyword");
+  await PlacesUtils.keywords.remove("keyword");
+  await check_keyword(false, "http://example.com/", "keyword");
+
+  await check_no_orphans();
+});
+
+add_task(async function test_addBookmarkAndKeyword() {
+  let timerPrecision = Preferences.get("privacy.reduceTimerPrecision");
+  Preferences.set("privacy.reduceTimerPrecision", false);
+
+  registerCleanupFunction(function () {
+    Preferences.set("privacy.reduceTimerPrecision", timerPrecision);
+  });
+
+  await check_keyword(false, "http://example.com/", "keyword");
+  let fc = await foreign_count("http://example.com/");
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    url: "http://example.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+
+  let observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example.com/",
+  });
+
+  observer.check([
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark.guid),
+      itemType: bookmark.type,
+      url: bookmark.url,
+      guid: bookmark.guid,
+      parentGuid: bookmark.parentGuid,
+      keyword: "keyword",
+      lastModified: new Date(bookmark.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+  ]);
+
+  await check_keyword(true, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 2); // +1 bookmark +1 keyword
+
+  // Now remove the keyword.
+  observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.remove("keyword");
+
+  observer.check([
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark.guid),
+      itemType: bookmark.type,
+      url: bookmark.url,
+      guid: bookmark.guid,
+      parentGuid: bookmark.parentGuid,
+      keyword: "",
+      lastModified: new Date(bookmark.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+  ]);
+
+  await check_keyword(false, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 1); // -1 keyword
+
+  // Add again the keyword, then remove the bookmark.
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example.com/",
+  });
+
+  observer = expectBookmarkNotifications();
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+  // the notification is synchronous but the removal process is async.
+  // Unfortunately there's nothing explicit we can wait for.
+  // eslint-disable-next-line no-empty
+  while (await foreign_count("http://example.com/")) {}
+  // We don't get any itemChanged notification since the bookmark has been
+  // removed already.
+  observer.check([]);
+
+  await check_keyword(false, "http://example.com/", "keyword");
+
+  await check_no_orphans();
+});
+
+add_task(async function test_addKeywordToURIHavingKeyword() {
+  await check_keyword(false, "http://example.com/", "keyword");
+  let fc = await foreign_count("http://example.com/");
+
+  let observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example.com/",
+  });
+  observer.check([]);
+
+  await check_keyword(true, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 1); // +1 keyword
+
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword2",
+    url: "http://example.com/",
+    postData: "test=1",
+  });
+
+  await check_keyword(true, "http://example.com/", "keyword");
+  await check_keyword(true, "http://example.com/", "keyword2", "test=1");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 2); // +1 keyword
+  let entries = [];
+  let entry = await PlacesUtils.keywords.fetch(
+    { url: "http://example.com/" },
+    e => entries.push(e)
+  );
+  Assert.equal(entries.length, 2);
+  Assert.deepEqual(entries[0], entry);
+
+  // Now remove the keywords.
+  observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.remove("keyword");
+  await PlacesUtils.keywords.remove("keyword2");
+  observer.check([]);
+
+  await check_keyword(false, "http://example.com/", "keyword");
+  await check_keyword(false, "http://example.com/", "keyword2");
+  Assert.equal(await foreign_count("http://example.com/"), fc); // -1 keyword
+
+  await check_no_orphans();
+});
+
+add_task(async function test_addBookmarkToURIHavingKeyword() {
+  await check_keyword(false, "http://example.com/", "keyword");
+  let fc = await foreign_count("http://example.com/");
+  let observer = expectBookmarkNotifications();
+
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example.com/",
+  });
+  observer.check([]);
+
+  await check_keyword(true, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 1); // +1 keyword
+
+  observer = expectBookmarkNotifications();
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    url: "http://example.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  Assert.equal(await foreign_count("http://example.com/"), fc + 2); // +1 bookmark
+  observer.check([]);
+
+  observer = expectBookmarkNotifications();
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+  // the notification is synchronous but the removal process is async.
+  // Unfortunately there's nothing explicit we can wait for.
+  // eslint-disable-next-line no-empty
+  while (await foreign_count("http://example.com/")) {}
+  // We don't get any itemChanged notification since the bookmark has been
+  // removed already.
+  observer.check([]);
+
+  await check_keyword(false, "http://example.com/", "keyword");
+
+  await check_no_orphans();
+});
+
+add_task(async function test_sameKeywordDifferentURL() {
+  let fc1 = await foreign_count("http://example1.com/");
+  let bookmark1 = await PlacesUtils.bookmarks.insert({
+    url: "http://example1.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  let fc2 = await foreign_count("http://example2.com/");
+  let bookmark2 = await PlacesUtils.bookmarks.insert({
+    url: "http://example2.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example1.com/",
+  });
+
+  await check_keyword(true, "http://example1.com/", "keyword");
+  Assert.equal(await foreign_count("http://example1.com/"), fc1 + 2); // +1 bookmark +1 keyword
+  await check_keyword(false, "http://example2.com/", "keyword");
+  Assert.equal(await foreign_count("http://example2.com/"), fc2 + 1); // +1 bookmark
+
+  // Assign the same keyword to another url.
+  let observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example2.com/",
+  });
+
+  observer.check([
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark1.guid),
+      itemType: bookmark1.type,
+      url: bookmark1.url,
+      guid: bookmark1.guid,
+      parentGuid: bookmark1.parentGuid,
+      keyword: "",
+      lastModified: new Date(bookmark1.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark2.guid),
+      itemType: bookmark2.type,
+      url: bookmark2.url,
+      guid: bookmark2.guid,
+      parentGuid: bookmark2.parentGuid,
+      keyword: "keyword",
+      lastModified: new Date(bookmark2.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+  ]);
+
+  await check_keyword(false, "http://example1.com/", "keyword");
+  Assert.equal(await foreign_count("http://example1.com/"), fc1 + 1); // -1 keyword
+  await check_keyword(true, "http://example2.com/", "keyword");
+  Assert.equal(await foreign_count("http://example2.com/"), fc2 + 2); // +1 keyword
+
+  // Now remove the keyword.
+  observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.remove("keyword");
+  observer.check([
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark2.guid),
+      itemType: bookmark2.type,
+      url: bookmark2.url,
+      guid: bookmark2.guid,
+      parentGuid: bookmark2.parentGuid,
+      keyword: "",
+      lastModified: new Date(bookmark2.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+  ]);
+
+  await check_keyword(false, "http://example1.com/", "keyword");
+  await check_keyword(false, "http://example2.com/", "keyword");
+  Assert.equal(await foreign_count("http://example1.com/"), fc1 + 1);
+  Assert.equal(await foreign_count("http://example2.com/"), fc2 + 1); // -1 keyword
+
+  await PlacesUtils.bookmarks.remove(bookmark1);
+  await PlacesUtils.bookmarks.remove(bookmark2);
+  Assert.equal(await foreign_count("http://example1.com/"), fc1); // -1 bookmark
+  // eslint-disable-next-line no-empty
+  while (await foreign_count("http://example2.com/")) {} // -1 keyword
+
+  await check_no_orphans();
+});
+
+add_task(async function test_sameURIDifferentKeyword() {
+  let fc = await foreign_count("http://example.com/");
+
+  let observer = expectBookmarkNotifications();
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    url: "http://example.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example.com/",
+  });
+
+  await check_keyword(true, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 2); // +1 bookmark +1 keyword
+
+  observer.check([
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark.guid),
+      itemType: bookmark.type,
+      url: bookmark.url,
+      guid: bookmark.guid,
+      parentGuid: bookmark.parentGuid,
+      keyword: "keyword",
+      lastModified: new Date(bookmark.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+  ]);
+
+  observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword2",
+    url: "http://example.com/",
+  });
+  await check_keyword(false, "http://example.com/", "keyword");
+  await check_keyword(true, "http://example.com/", "keyword2");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 2); // -1 keyword +1 keyword
+  observer.check([
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark.guid),
+      itemType: bookmark.type,
+      url: bookmark.url,
+      guid: bookmark.guid,
+      parentGuid: bookmark.parentGuid,
+      keyword: "keyword2",
+      lastModified: new Date(bookmark.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+  ]);
+
+  // Now remove the bookmark.
+  await PlacesUtils.bookmarks.remove(bookmark);
+  // eslint-disable-next-line no-empty
+  while (await foreign_count("http://example.com/")) {}
+  await check_keyword(false, "http://example.com/", "keyword");
+  await check_keyword(false, "http://example.com/", "keyword2");
+
+  await check_no_orphans();
+});
+
+add_task(async function test_deleteKeywordMultipleBookmarks() {
+  let fc = await foreign_count("http://example.com/");
+
+  let observer = expectBookmarkNotifications();
+  let bookmark1 = await PlacesUtils.bookmarks.insert({
+    url: "http://example.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  let bookmark2 = await PlacesUtils.bookmarks.insert({
+    url: "http://example.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example.com/",
+  });
+
+  await check_keyword(true, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 3); // +2 bookmark +1 keyword
+  observer.check([
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark2.guid),
+      itemType: bookmark2.type,
+      url: bookmark2.url,
+      guid: bookmark2.guid,
+      parentGuid: bookmark2.parentGuid,
+      keyword: "keyword",
+      lastModified: new Date(bookmark2.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark1.guid),
+      itemType: bookmark1.type,
+      url: bookmark1.url,
+      guid: bookmark1.guid,
+      parentGuid: bookmark1.parentGuid,
+      keyword: "keyword",
+      lastModified: new Date(bookmark1.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+  ]);
+
+  observer = expectBookmarkNotifications();
+  await PlacesUtils.keywords.remove("keyword");
+  await check_keyword(false, "http://example.com/", "keyword");
+  Assert.equal(await foreign_count("http://example.com/"), fc + 2); // -1 keyword
+  observer.check([
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark2.guid),
+      itemType: bookmark2.type,
+      url: bookmark2.url,
+      guid: bookmark2.guid,
+      parentGuid: bookmark2.parentGuid,
+      keyword: "",
+      lastModified: new Date(bookmark2.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+    {
+      type: "bookmark-keyword-changed",
+      id: await PlacesTestUtils.promiseItemId(bookmark1.guid),
+      itemType: bookmark1.type,
+      url: bookmark1.url,
+      guid: bookmark1.guid,
+      parentGuid: bookmark1.parentGuid,
+      keyword: "",
+      lastModified: new Date(bookmark1.lastModified),
+      source: Ci.nsINavBookmarksService.SOURCE_DEFAULT,
+      isTagging: false,
+    },
+  ]);
+
+  // Now remove the bookmarks.
+  await PlacesUtils.bookmarks.remove(bookmark1);
+  await PlacesUtils.bookmarks.remove(bookmark2);
+  Assert.equal(await foreign_count("http://example.com/"), fc); // -2 bookmarks
+
+  await check_no_orphans();
+});
+
+add_task(async function test_multipleKeywordsSamePostData() {
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example.com/",
+    postData: "postData1",
+  });
+  await check_keyword(true, "http://example.com/", "keyword", "postData1");
+  // Add another keyword with same postData, should fail.
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword2",
+    url: "http://example.com/",
+    postData: "postData1",
+  });
+  await check_keyword(false, "http://example.com/", "keyword", "postData1");
+  await check_keyword(true, "http://example.com/", "keyword2", "postData1");
+
+  await PlacesUtils.keywords.remove("keyword2");
+
+  await check_no_orphans();
+});
+
+add_task(async function test_bookmarkURLChange() {
+  let fc1 = await foreign_count("http://example1.com/");
+  let fc2 = await foreign_count("http://example2.com/");
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    url: "http://example1.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  await PlacesUtils.keywords.insert({
+    keyword: "keyword",
+    url: "http://example1.com/",
+  });
+
+  await check_keyword(true, "http://example1.com/", "keyword");
+  Assert.equal(await foreign_count("http://example1.com/"), fc1 + 2); // +1 bookmark +1 keyword
+
+  await PlacesUtils.bookmarks.update({
+    guid: bookmark.guid,
+    url: "http://example2.com/",
+  });
+  await promiseKeyword("keyword", "http://example2.com/");
+
+  await check_keyword(false, "http://example1.com/", "keyword");
+  await check_keyword(true, "http://example2.com/", "keyword");
+  Assert.equal(await foreign_count("http://example1.com/"), fc1); // -1 bookmark -1 keyword
+  Assert.equal(await foreign_count("http://example2.com/"), fc2 + 2); // +1 bookmark +1 keyword
+});
+
+add_task(async function test_tagDoesntPreventKeywordRemoval() {
+  await check_keyword(false, "http://example.com/", "example");
+  let fc = await foreign_count("http://example.com/");
+
+  let httpBookmark = await PlacesUtils.bookmarks.insert({
+    url: "http://example.com/",
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+  });
+  Assert.equal(await foreign_count("http://example.com/"), fc + 1); // +1 bookmark
+
+  PlacesUtils.tagging.tagURI(uri("http://example.com/"), ["example_tag"]);
+  Assert.equal(await foreign_count("http://example.com/"), fc + 2); // +1 bookmark +1 tag
+
+  await PlacesUtils.keywords.insert({
+    keyword: "example",
+    url: "http://example.com/",
+  });
+  Assert.equal(await foreign_count("http://example.com/"), fc + 3); // +1 bookmark +1 tag +1 keyword
+
+  await check_keyword(true, "http://example.com/", "example");
+
+  await PlacesUtils.bookmarks.remove(httpBookmark);
+
+  await TestUtils.waitForCondition(
+    async () =>
+      !(await PlacesUtils.bookmarks.fetch({ url: "http://example.com/" })),
+    "Wait for bookmark to be removed"
+  );
+
+  await check_keyword(false, "http://example.com/", "example");
+  Assert.equal(await foreign_count("http://example.com/"), fc); // bookmark, keyword, and tag should all have been removed
+
+  await check_no_orphans();
+});
diff --git a/toolkit/components/places/tests/unit/test_lastModified.js b/toolkit/components/places/tests/unit/test_lastModified.js
new file mode 100644
index 0000000000..dc44814548
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_lastModified.js
@@ -0,0 +1,78 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function assert_date_eq(a, b) {
+  if (typeof a != "number") {
+    a = PlacesUtils.toPRTime(a);
+  }
+  if (typeof b != "number") {
+    b = PlacesUtils.toPRTime(b);
+  }
+  Assert.equal(a, b, "The dates should match");
+}
+
+/**
+ * Test that inserting a new bookmark will set lastModified to the same
+ * values as dateAdded.
+ */
+add_task(async function test_bookmarkLastModified() {
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: "http://www.mozilla.org/",
+    title: "itemTitle",
+  });
+
+  let guid = bookmark.guid;
+
+  // Check the bookmark from the database.
+  bookmark = await PlacesUtils.bookmarks.fetch(guid);
+
+  let dateAdded = PlacesUtils.toPRTime(bookmark.dateAdded);
+  assert_date_eq(dateAdded, bookmark.lastModified);
+
+  // Change lastModified, then change dateAdded.  LastModified should be set
+  // to the new dateAdded.
+  // This could randomly fail on virtual machines due to timing issues, so
+  // we manually increase the time value.  See bug 500640 for details.
+  await PlacesUtils.bookmarks.update({
+    guid,
+    lastModified: PlacesUtils.toDate(dateAdded + 1000),
+  });
+
+  bookmark = await PlacesUtils.bookmarks.fetch(guid);
+
+  assert_date_eq(bookmark.lastModified, dateAdded + 1000);
+  Assert.ok(
+    bookmark.dateAdded < bookmark.lastModified,
+    "Date added should be earlier than last modified."
+  );
+
+  await PlacesUtils.bookmarks.update({
+    guid,
+    dateAdded: PlacesUtils.toDate(dateAdded + 2000),
+  });
+
+  bookmark = await PlacesUtils.bookmarks.fetch(guid);
+
+  assert_date_eq(bookmark.dateAdded, dateAdded + 2000);
+  assert_date_eq(bookmark.dateAdded, bookmark.lastModified);
+
+  // If dateAdded is set to older than lastModified, then we shouldn't
+  // update lastModified to keep sync happy.
+  let origLastModified = bookmark.lastModified;
+
+  await PlacesUtils.bookmarks.update({
+    guid,
+    dateAdded: PlacesUtils.toDate(dateAdded - 10000),
+  });
+
+  bookmark = await PlacesUtils.bookmarks.fetch(guid);
+
+  assert_date_eq(bookmark.dateAdded, dateAdded - 10000);
+  assert_date_eq(bookmark.lastModified, origLastModified);
+
+  await PlacesUtils.bookmarks.remove(guid);
+});
diff --git a/toolkit/components/places/tests/unit/test_markpageas.js b/toolkit/components/places/tests/unit/test_markpageas.js
new file mode 100644
index 0000000000..03080f4af6
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_markpageas.js
@@ -0,0 +1,48 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var gVisits = [
+  { url: "http://www.mozilla.com/", transition: TRANSITION_TYPED },
+  { url: "http://www.google.com/", transition: TRANSITION_BOOKMARK },
+  { url: "http://www.espn.com/", transition: TRANSITION_LINK },
+];
+
+add_task(async function test_execute() {
+  let completionPromise = new Promise(resolveCompletionPromise => {
+    let visitCount = 0;
+    function listener(aEvents) {
+      Assert.equal(aEvents.length, 1, "Right number of visits notified");
+      Assert.equal(aEvents[0].type, "page-visited");
+      let event = aEvents[0];
+      Assert.equal(event.url, gVisits[visitCount].url);
+      Assert.equal(event.transitionType, gVisits[visitCount].transition);
+      visitCount++;
+
+      if (visitCount == gVisits.length) {
+        resolveCompletionPromise();
+        PlacesObservers.removeListener(["page-visited"], listener);
+      }
+    }
+    PlacesObservers.addListener(["page-visited"], listener);
+  });
+
+  for (var visit of gVisits) {
+    if (visit.transition == TRANSITION_TYPED) {
+      PlacesUtils.history.markPageAsTyped(uri(visit.url));
+    } else if (visit.transition == TRANSITION_BOOKMARK) {
+      PlacesUtils.history.markPageAsFollowedBookmark(uri(visit.url));
+    } else {
+      // because it is a top level visit with no referrer,
+      // it will result in TRANSITION_LINK
+    }
+    await PlacesTestUtils.addVisits({
+      uri: uri(visit.url),
+      transition: visit.transition,
+    });
+  }
+
+  await completionPromise;
+});
diff --git a/toolkit/components/places/tests/unit/test_metadata.js b/toolkit/components/places/tests/unit/test_metadata.js
new file mode 100644
index 0000000000..26399f7274
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_metadata.js
@@ -0,0 +1,285 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+add_task(async function test_metadata() {
+  await PlacesUtils.metadata.set("test/integer", 123);
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("test/integer"),
+    123,
+    "Should store new integer value"
+  );
+
+  await PlacesUtils.metadata.set("test/double", 123.45);
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("test/double"),
+    123.45,
+    "Should store new double value"
+  );
+  await PlacesUtils.metadata.set("test/double", 567.89);
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("test/double"),
+    567.89,
+    "Should update existing double value"
+  );
+
+  await PlacesUtils.metadata.set("test/boolean", false);
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("test/boolean"),
+    false,
+    "Should store new Boolean value"
+  );
+  await PlacesUtils.metadata.set("test/boolean", true);
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("test/boolean"),
+    true,
+    "Should update existing Boolean value"
+  );
+
+  await PlacesUtils.metadata.set("test/string", "hi");
+  Assert.equal(
+    await PlacesUtils.metadata.get("test/string"),
+    "hi",
+    "Should store new string value"
+  );
+  await PlacesUtils.metadata.cache.clear();
+  Assert.equal(
+    await PlacesUtils.metadata.get("test/string"),
+    "hi",
+    "Should return string value after clearing cache"
+  );
+
+  await Assert.rejects(
+    PlacesUtils.metadata.get("test/nonexistent"),
+    /No data stored for key test\/nonexistent/,
+    "Should reject for a non-existent key and no default value."
+  );
+  Assert.equal(
+    await PlacesUtils.metadata.get("test/nonexistent", "defaultValue"),
+    "defaultValue",
+    "Should return the default value for a non-existent key."
+  );
+
+  // Values are untyped; it's OK to store a value of a different type for the
+  // same key.
+  await PlacesUtils.metadata.set("test/string", 111);
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("test/string"),
+    111,
+    "Should replace string with integer"
+  );
+  await PlacesUtils.metadata.set("test/string", null);
+  await Assert.rejects(
+    PlacesUtils.metadata.get("test/string"),
+    /No data stored for key test\/string/,
+    "Should clear value when setting to NULL"
+  );
+
+  await PlacesUtils.metadata.delete("test/string", "test/boolean");
+  await Assert.rejects(
+    PlacesUtils.metadata.get("test/string"),
+    /No data stored for key test\/string/,
+    "Should delete string value"
+  );
+  await Assert.rejects(
+    PlacesUtils.metadata.get("test/boolean"),
+    /No data stored for key test\/boolean/,
+    "Should delete Boolean value"
+  );
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("test/integer"),
+    123,
+    "Should keep undeleted integer value"
+  );
+
+  await PlacesTestUtils.clearMetadata();
+  await Assert.rejects(
+    PlacesUtils.metadata.get("test/integer"),
+    /No data stored for key test\/integer/,
+    "Should clear integer value"
+  );
+  await Assert.rejects(
+    PlacesUtils.metadata.get("test/double"),
+    /No data stored for key test\/double/,
+    "Should clear double value"
+  );
+});
+
+add_task(async function test_metadata_canonical_keys() {
+  await PlacesUtils.metadata.set("Test/Integer", 123);
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("tEsT/integer"),
+    123,
+    "New keys should be case-insensitive"
+  );
+  await PlacesUtils.metadata.set("test/integer", 456);
+  Assert.strictEqual(
+    await PlacesUtils.metadata.get("TEST/INTEGER"),
+    456,
+    "Existing keys should be case-insensitive"
+  );
+
+  await Assert.rejects(
+    PlacesUtils.metadata.set("", 123),
+    /Invalid metadata key/,
+    "Should reject empty keys"
+  );
+  await Assert.rejects(
+    PlacesUtils.metadata.get(123),
+    /Invalid metadata key/,
+    "Should reject numeric keys"
+  );
+  await Assert.rejects(
+    PlacesUtils.metadata.delete(true),
+    /Invalid metadata key/,
+    "Should reject Boolean keys"
+  );
+  await Assert.rejects(
+    PlacesUtils.metadata.set({}),
+    /Invalid metadata key/,
+    "Should reject object keys"
+  );
+  await Assert.rejects(
+    PlacesUtils.metadata.get(null),
+    /Invalid metadata key/,
+    "Should reject null keys"
+  );
+  await Assert.rejects(
+    PlacesUtils.metadata.delete("!@#$"),
+    /Invalid metadata key/,
+    "Should reject keys with invalid characters"
+  );
+});
+
+add_task(async function test_metadata_blobs() {
+  let blob = new Uint8Array([1, 2, 3]);
+  await PlacesUtils.metadata.set("test/blob", blob);
+
+  let sameBlob = await PlacesUtils.metadata.get("test/blob");
+  Assert.equal(
+    ChromeUtils.getClassName(sameBlob),
+    "Uint8Array",
+    "Should cache typed array for blob value"
+  );
+  Assert.deepEqual(sameBlob, blob, "Should store new blob value");
+
+  info("Remove blob from cache");
+  await PlacesUtils.metadata.cache.clear();
+
+  let newBlob = await PlacesUtils.metadata.get("test/blob");
+  Assert.equal(
+    ChromeUtils.getClassName(newBlob),
+    "Uint8Array",
+    "Should inflate blob into typed array"
+  );
+  Assert.deepEqual(
+    newBlob,
+    blob,
+    "Should return same blob after clearing cache"
+  );
+
+  await PlacesTestUtils.clearMetadata();
+});
+
+add_task(async function test_metadata_arrays() {
+  let array = [1, 2, 3, "\u2713 \u00E0 la mode"];
+  await PlacesUtils.metadata.set("test/array", array);
+
+  let sameArray = await PlacesUtils.metadata.get("test/array");
+  Assert.ok(Array.isArray(sameArray), "Should cache array for array value");
+  Assert.deepEqual(sameArray, array, "Should store new array value");
+
+  info("Remove array from cache");
+  await PlacesUtils.metadata.cache.clear();
+
+  let newArray = await PlacesUtils.metadata.get("test/array");
+  Assert.ok(Array.isArray(newArray), "Should inflate into array");
+  Assert.deepEqual(
+    newArray,
+    array,
+    "Should return same array after clearing cache"
+  );
+
+  await PlacesTestUtils.clearMetadata();
+});
+
+add_task(async function test_metadata_objects() {
+  let object = { foo: 123, bar: "test", meow: "\u2713 \u00E0 la mode" };
+  await PlacesUtils.metadata.set("test/object", object);
+
+  let sameObject = await PlacesUtils.metadata.get("test/object");
+  Assert.equal(
+    typeof sameObject,
+    "object",
+    "Should cache object for object value"
+  );
+  Assert.deepEqual(sameObject, object, "Should store new object value");
+
+  info("Remove object from cache");
+  await PlacesUtils.metadata.cache.clear();
+
+  let newObject = await PlacesUtils.metadata.get("test/object");
+  Assert.equal(typeof newObject, "object", "Should inflate into object");
+  Assert.deepEqual(
+    newObject,
+    object,
+    "Should return same object after clearing cache"
+  );
+
+  await PlacesTestUtils.clearMetadata();
+});
+
+add_task(async function test_metadata_unparsable() {
+  await PlacesUtils.withConnectionWrapper("test_medata", db => {
+    let data = PlacesUtils.metadata._base64Encode("{hjjkhj}");
+
+    return db.execute(`
+      INSERT INTO moz_meta (key, value)
+      VALUES ("test/unparsable", "data:application/json;base64,${data}")
+    `);
+  });
+
+  await Assert.rejects(
+    PlacesUtils.metadata.get("test/unparsable"),
+    /SyntaxError: JSON.parse/,
+    "Should reject for an unparsable value with no default"
+  );
+  Assert.deepEqual(
+    await PlacesUtils.metadata.get("test/unparsable", { foo: 1 }),
+    { foo: 1 },
+    "Should return the default when encountering an unparsable value."
+  );
+
+  await PlacesTestUtils.clearMetadata();
+});
+
+add_task(async function test_metadata_setMany() {
+  await PlacesUtils.metadata.setMany(
+    new Map([
+      ["test/string", "hi"],
+      ["test/boolean", true],
+    ])
+  );
+  await PlacesUtils.metadata.set("test/string", "hi");
+  Assert.deepEqual(
+    await PlacesUtils.metadata.get("test/string"),
+    "hi",
+    "Should store new string value"
+  );
+  Assert.deepEqual(
+    await PlacesUtils.metadata.get("test/boolean"),
+    true,
+    "Should store new boolean value"
+  );
+  await PlacesUtils.metadata.cache.clear();
+  Assert.equal(
+    await PlacesUtils.metadata.get("test/string"),
+    "hi",
+    "Should return string value after clearing cache"
+  );
+  Assert.deepEqual(
+    await PlacesUtils.metadata.get("test/boolean"),
+    true,
+    "Should store new boolean value"
+  );
+  await PlacesTestUtils.clearMetadata();
+});
diff --git a/toolkit/components/places/tests/unit/test_missing_builtin_folders.js b/toolkit/components/places/tests/unit/test_missing_builtin_folders.js
new file mode 100644
index 0000000000..a7d36d27da
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_missing_builtin_folders.js
@@ -0,0 +1,112 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * This file tests that a missing built-in folders (child of root) are correctly
+ * fixed when the database is loaded.
+ */
+
+const ALL_ROOT_GUIDS = [
+  PlacesUtils.bookmarks.menuGuid,
+  PlacesUtils.bookmarks.unfiledGuid,
+  PlacesUtils.bookmarks.toolbarGuid,
+  PlacesUtils.bookmarks.tagsGuid,
+  PlacesUtils.bookmarks.mobileGuid,
+];
+
+add_task(async function setup() {
+  await setupPlacesDatabase([
+    "migration",
+    `places_v${Ci.nsINavHistoryService.DATABASE_SCHEMA_VERSION}.sqlite`,
+  ]);
+
+  // Prepare database contents by removing the tolbar and mobile folders.
+  let path = PathUtils.join(PathUtils.profileDir, DB_FILENAME);
+  let db = await Sqlite.openConnection({ path });
+  await db.execute(
+    `
+    DELETE FROM moz_bookmarks WHERE guid IN(:toolbar, :mobile)
+    `,
+    {
+      toolbar: PlacesUtils.bookmarks.toolbarGuid,
+      mobile: PlacesUtils.bookmarks.mobileGuid,
+    }
+  );
+  await db.close();
+});
+
+add_task(async function test_database_recreates_roots() {
+  Assert.ok(
+    PlacesUtils.history.databaseStatus ==
+      PlacesUtils.history.DATABASE_STATUS_OK ||
+      PlacesUtils.history.databaseStatus ==
+        PlacesUtils.history.DATABASE_STATUS_UPGRADED,
+    "Should successfully access the database for the first time"
+  );
+
+  let db = await PlacesUtils.promiseDBConnection();
+  let rootId = await PlacesTestUtils.promiseItemId(
+    PlacesUtils.bookmarks.rootGuid
+  );
+  for (let guid of ALL_ROOT_GUIDS) {
+    let rows = await db.execute(
+      `
+      SELECT id, parent FROM moz_bookmarks
+      WHERE guid = :guid
+    `,
+      { guid }
+    );
+
+    Assert.equal(rows.length, 1, "Should have exactly one row for the root");
+
+    Assert.equal(
+      rows[0].getResultByName("parent"),
+      rootId,
+      "Should have been created with the correct parent"
+    );
+
+    let root = await PlacesUtils.bookmarks.fetch(guid);
+
+    Assert.equal(root.guid, guid, "GUIDs should match");
+    Assert.equal(
+      root.parentGuid,
+      PlacesUtils.bookmarks.rootGuid,
+      "Should have the correct parent GUID"
+    );
+    Assert.equal(
+      root.type,
+      PlacesUtils.bookmarks.TYPE_FOLDER,
+      "Should have the correct type"
+    );
+
+    let id = rows[0].getResultByName("id");
+    Assert.equal(
+      await PlacesTestUtils.promiseItemId(guid),
+      id,
+      "Should return the correct id from promiseItemId"
+    );
+    Assert.equal(
+      await PlacesTestUtils.promiseItemGuid(id),
+      guid,
+      "Should return the correct guid from promiseItemGuid"
+    );
+  }
+
+  let rows = await db.execute(
+    `
+    SELECT 1 FROM moz_bookmarks
+    WHERE parent = (SELECT id from moz_bookmarks WHERE guid = :guid)
+  `,
+    {
+      guid: PlacesUtils.bookmarks.rootGuid,
+    }
+  );
+
+  Assert.equal(
+    rows.length,
+    ALL_ROOT_GUIDS.length,
+    "Root folder should have the expected number of children"
+  );
+});
diff --git a/toolkit/components/places/tests/unit/test_missing_root_folder.js b/toolkit/components/places/tests/unit/test_missing_root_folder.js
new file mode 100644
index 0000000000..59f8814d03
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_missing_root_folder.js
@@ -0,0 +1,106 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * This file tests that a missing root folder is correctly fixed when the
+ * database is loaded.
+ */
+
+const ALL_ROOT_GUIDS = [
+  PlacesUtils.bookmarks.menuGuid,
+  PlacesUtils.bookmarks.unfiledGuid,
+  PlacesUtils.bookmarks.toolbarGuid,
+  PlacesUtils.bookmarks.tagsGuid,
+  PlacesUtils.bookmarks.mobileGuid,
+];
+
+add_task(async function setup() {
+  await setupPlacesDatabase([
+    "migration",
+    `places_v${Ci.nsINavHistoryService.DATABASE_SCHEMA_VERSION}.sqlite`,
+  ]);
+
+  // Prepare database contents by removing the root folder.
+  let path = PathUtils.join(PathUtils.profileDir, DB_FILENAME);
+  let db = await Sqlite.openConnection({ path });
+  await db.execute(
+    `
+    DELETE FROM moz_bookmarks WHERE guid = :guid
+    `,
+    {
+      guid: PlacesUtils.bookmarks.rootGuid,
+    }
+  );
+  await db.close();
+});
+
+add_task(async function test_database_recreates_roots() {
+  Assert.ok(
+    PlacesUtils.history.databaseStatus ==
+      PlacesUtils.history.DATABASE_STATUS_OK ||
+      PlacesUtils.history.databaseStatus ==
+        PlacesUtils.history.DATABASE_STATUS_UPGRADED,
+    "Should successfully access the database for the first time"
+  );
+
+  let db = await PlacesUtils.promiseDBConnection();
+
+  let rows = await db.execute(
+    `
+    SELECT id, parent, type FROM moz_bookmarks
+    WHERE guid = :guid
+  `,
+    { guid: PlacesUtils.bookmarks.rootGuid }
+  );
+
+  Assert.equal(rows.length, 1, "Should have added exactly one root");
+  Assert.greaterOrEqual(
+    rows[0].getResultByName("id"),
+    1,
+    "Should have a valid root Id"
+  );
+  Assert.equal(
+    rows[0].getResultByName("parent"),
+    0,
+    "Should have a parent of id 0"
+  );
+  Assert.equal(
+    rows[0].getResultByName("type"),
+    PlacesUtils.bookmarks.TYPE_FOLDER,
+    "Should have a type of folder"
+  );
+
+  let id = rows[0].getResultByName("id");
+  Assert.equal(
+    await PlacesTestUtils.promiseItemId(PlacesUtils.bookmarks.rootGuid),
+    id,
+    "Should return the correct id from promiseItemId"
+  );
+  Assert.equal(
+    await PlacesTestUtils.promiseItemGuid(id),
+    PlacesUtils.bookmarks.rootGuid,
+    "Should return the correct guid from promiseItemGuid"
+  );
+
+  // Note: Currently we do not fix the parent of the folders on initial startup.
+  // There is a maintenance task that will do it, hence we don't check the parents
+  // here, just that the built-in folders correctly exist and haven't been
+  // duplicated.
+  for (let guid of ALL_ROOT_GUIDS) {
+    rows = await db.execute(
+      `
+      SELECT id FROM moz_bookmarks
+      WHERE guid = :guid
+    `,
+      { guid }
+    );
+
+    Assert.equal(rows.length, 1, "Should have exactly one row for the root");
+
+    let root = await PlacesUtils.bookmarks.fetch(guid);
+
+    Assert.equal(root.guid, guid, "GUIDs should match");
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_multi_observation.js b/toolkit/components/places/tests/unit/test_multi_observation.js
new file mode 100644
index 0000000000..d56eabf8f1
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_multi_observation.js
@@ -0,0 +1,384 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test whether registered listener capture proper events.
+// We test the following combinations.
+// * Listener: listen to single/multi event(s)
+// * Event: fire single/multi type of event(s)
+// * Timing: fire event(s) at same time/separately
+// And also test notifying empty events.
+
+add_task(async () => {
+  info("Test for listening to single event and firing single event");
+
+  const observer = startObservation(["page-visited"]);
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "test",
+      url: "http://example.com/test",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const expectedFiredEvents = [
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/test",
+      },
+    ],
+  ];
+  assertFiredEvents(observer.firedEvents, expectedFiredEvents);
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async () => {
+  info("Test for listening to multi events with firing single event");
+
+  const observer = startObservation(["page-visited", "page-title-changed"]);
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "test",
+      url: "http://example.com/test",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const expectedFiredEvents = [
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/test",
+      },
+    ],
+  ];
+  assertFiredEvents(observer.firedEvents, expectedFiredEvents);
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async () => {
+  info(
+    "Test for listening to single event with firing multi events at same time"
+  );
+
+  const vistedObserver = startObservation(["page-visited"]);
+  const titleChangedObserver = startObservation(["page-title-changed"]);
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "will change",
+      url: "http://example.com/title",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+    {
+      title: "changed",
+      url: "http://example.com/title",
+      referrer: "http://example.com/title",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+    {
+      title: "another",
+      url: "http://example.com/another",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const expectedVisitedFiredEvents = [
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/title",
+      },
+      {
+        type: "page-visited",
+        url: "http://example.com/title",
+      },
+      {
+        type: "page-visited",
+        url: "http://example.com/another",
+      },
+    ],
+  ];
+  assertFiredEvents(vistedObserver.firedEvents, expectedVisitedFiredEvents);
+
+  const expectedTitleChangedFiredEvents = [
+    [
+      {
+        type: "page-title-changed",
+        url: "http://example.com/title",
+        title: "changed",
+      },
+    ],
+  ];
+  assertFiredEvents(
+    titleChangedObserver.firedEvents,
+    expectedTitleChangedFiredEvents
+  );
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async () => {
+  info(
+    "Test for listening to single event with firing multi events separately"
+  );
+
+  const observer = startObservation(["page-visited"]);
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "test",
+      url: "http://example.com/test",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    title: "a folder",
+  });
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "another",
+      url: "http://example.com/another",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const expectedFiredEvents = [
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/test",
+      },
+    ],
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/another",
+      },
+    ],
+  ];
+  assertFiredEvents(observer.firedEvents, expectedFiredEvents);
+
+  await PlacesUtils.history.clear();
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+});
+
+add_task(async () => {
+  info("Test for listening to multi events with firing single event");
+
+  const observer = startObservation([
+    "page-visited",
+    "page-title-changed",
+    "bookmark-added",
+  ]);
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "test",
+      url: "http://example.com/test",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const expectedFiredEvents = [
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/test",
+      },
+    ],
+  ];
+  assertFiredEvents(observer.firedEvents, expectedFiredEvents);
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async () => {
+  info(
+    "Test for listening to multi events with firing multi events at same time"
+  );
+
+  const observer = startObservation([
+    "page-visited",
+    "page-title-changed",
+    "bookmark-added",
+  ]);
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "will change",
+      url: "http://example.com/title",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+    {
+      title: "changed",
+      url: "http://example.com/title",
+      referrer: "http://example.com/title",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+    {
+      title: "another",
+      url: "http://example.com/another",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const expectedFiredEvents = [
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/title",
+      },
+      {
+        type: "page-visited",
+        url: "http://example.com/title",
+      },
+      {
+        type: "page-title-changed",
+        url: "http://example.com/title",
+        title: "changed",
+      },
+      {
+        type: "page-visited",
+        url: "http://example.com/another",
+      },
+    ],
+  ];
+  assertFiredEvents(observer.firedEvents, expectedFiredEvents);
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async () => {
+  info(
+    "Test for listening to multi events with firing multi events separately"
+  );
+
+  const observer = startObservation([
+    "page-visited",
+    "page-title-changed",
+    "bookmark-added",
+  ]);
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "will change",
+      url: "http://example.com/title",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    title: "a folder",
+  });
+
+  await PlacesUtils.history.insertMany([
+    {
+      title: "changed",
+      url: "http://example.com/title",
+      referrer: "http://example.com/title",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+
+  const expectedFiredEvents = [
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/title",
+      },
+    ],
+    [
+      {
+        type: "bookmark-added",
+        title: "a folder",
+      },
+    ],
+    [
+      {
+        type: "page-visited",
+        url: "http://example.com/title",
+      },
+      {
+        type: "page-title-changed",
+        url: "http://example.com/title",
+        title: "changed",
+      },
+    ],
+  ];
+  assertFiredEvents(observer.firedEvents, expectedFiredEvents);
+
+  await PlacesUtils.history.clear();
+  await PlacesUtils.bookmarks.remove(bookmark.guid);
+});
+
+add_task(async function test_empty_notifications_array() {
+  info("Test whether listener does not receive empty events");
+
+  if (AppConstants.DEBUG) {
+    info(
+      "Ignore this test since we added a MOZ_ASSERT for empty events in debug build"
+    );
+    return;
+  }
+
+  const observer = startObservation(["page-visited"]);
+  PlacesObservers.notifyListeners([]);
+  Assert.equal(observer.firedEvents.length, 0, "Listener does not receive any");
+});
+
+function startObservation(targets) {
+  const observer = {
+    firedEvents: [],
+    handle(events) {
+      this.firedEvents.push(events);
+    },
+  };
+
+  PlacesObservers.addListener(targets, observer.handle.bind(observer));
+
+  return observer;
+}
+
+function assertFiredEvents(firedEvents, expectedFiredEvents) {
+  Assert.equal(
+    firedEvents.length,
+    expectedFiredEvents.length,
+    "Number events fired is correct"
+  );
+
+  for (let i = 0; i < firedEvents.length; i++) {
+    info(`Check firedEvents[${i}]`);
+    const events = firedEvents[i];
+    const expectedEvents = expectedFiredEvents[i];
+    assertEvents(events, expectedEvents);
+  }
+}
+
+function assertEvents(events, expectedEvents) {
+  Assert.equal(
+    events.length,
+    expectedEvents.length,
+    "Number events is correct"
+  );
+
+  for (let i = 0; i < events.length; i++) {
+    info(`Check events[${i}]`);
+    const event = events[i];
+    const expectedEvent = expectedEvents[i];
+
+    for (let field in expectedEvent) {
+      Assert.equal(event[field], expectedEvent[field], `${field} is correct`);
+    }
+  }
+}
diff --git a/toolkit/components/places/tests/unit/test_multi_word_tags.js b/toolkit/components/places/tests/unit/test_multi_word_tags.js
new file mode 100644
index 0000000000..17a68cf972
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_multi_word_tags.js
@@ -0,0 +1,147 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Get history service
+try {
+  var histsvc = Cc["@mozilla.org/browser/nav-history-service;1"].getService(
+    Ci.nsINavHistoryService
+  );
+} catch (ex) {
+  do_throw("Could not get history service\n");
+}
+
+// Get tagging service
+try {
+  var tagssvc = Cc["@mozilla.org/browser/tagging-service;1"].getService(
+    Ci.nsITaggingService
+  );
+} catch (ex) {
+  do_throw("Could not get tagging service\n");
+}
+
+add_task(async function run_test() {
+  var uri1 = uri("http://site.tld/1");
+  var uri2 = uri("http://site.tld/2");
+  var uri3 = uri("http://site.tld/3");
+  var uri4 = uri("http://site.tld/4");
+  var uri5 = uri("http://site.tld/5");
+  var uri6 = uri("http://site.tld/6");
+
+  await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.menuGuid,
+    children: [
+      { url: uri1 },
+      { url: uri2 },
+      { url: uri3 },
+      { url: uri4 },
+      { url: uri5 },
+      { url: uri6 },
+    ],
+  });
+
+  tagssvc.tagURI(uri1, ["foo"]);
+  tagssvc.tagURI(uri2, ["bar"]);
+  tagssvc.tagURI(uri3, ["cheese"]);
+  tagssvc.tagURI(uri4, ["foo bar"]);
+  tagssvc.tagURI(uri5, ["bar cheese"]);
+  tagssvc.tagURI(uri6, ["foo bar cheese"]);
+
+  // Search for "item", should get one result
+  var options = histsvc.getNewQueryOptions();
+  options.queryType = Ci.nsINavHistoryQueryOptions.QUERY_TYPE_BOOKMARKS;
+
+  var query = histsvc.getNewQuery();
+  query.searchTerms = "foo";
+  var result = histsvc.executeQuery(query, options);
+  var root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 3);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/1");
+  Assert.equal(root.getChild(1).uri, "http://site.tld/4");
+  Assert.equal(root.getChild(2).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "bar";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 4);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/2");
+  Assert.equal(root.getChild(1).uri, "http://site.tld/4");
+  Assert.equal(root.getChild(2).uri, "http://site.tld/5");
+  Assert.equal(root.getChild(3).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "cheese";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 3);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/3");
+  Assert.equal(root.getChild(1).uri, "http://site.tld/5");
+  Assert.equal(root.getChild(2).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "foo bar";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 2);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/4");
+  Assert.equal(root.getChild(1).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "bar foo";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 2);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/4");
+  Assert.equal(root.getChild(1).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "bar cheese";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 2);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/5");
+  Assert.equal(root.getChild(1).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "cheese bar";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 2);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/5");
+  Assert.equal(root.getChild(1).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "foo bar cheese";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 1);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "cheese foo bar";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 1);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/6");
+  root.containerOpen = false;
+
+  query.searchTerms = "cheese bar foo";
+  result = histsvc.executeQuery(query, options);
+  root = result.root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 1);
+  Assert.equal(root.getChild(0).uri, "http://site.tld/6");
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_nested_notifications.js b/toolkit/components/places/tests/unit/test_nested_notifications.js
new file mode 100644
index 0000000000..35bcd043d7
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_nested_notifications.js
@@ -0,0 +1,186 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Test for nested notifications of Places events.
+ * In this test, we check behavior of listeners of Places event upon firing nested
+ * notification from inside of listener that received notifications.
+ */
+add_task(async function () {
+  // We prepare 6 listeners for the test.
+  // 1. Listener that added before root notification.
+  const addRoot = new Observer();
+  // 2. Listener that added before root notification
+  //    but removed before first nest notification.
+  const addRootRemoveFirst = new Observer();
+  // 3. Listener that added before root notification
+  //    but removed before second nest notification.
+  const addRootRemoveSecond = new Observer();
+  // 4. Listener that added before first nest notification.
+  const addFirst = new Observer();
+  // 5. Listener that added before first nest notification
+  //    but removed before second nest notification.
+  const addFirstRemoveSecond = new Observer();
+  // 6. Listener that added before second nest notification.
+  const addSecond = new Observer();
+
+  // This is a listener listened the root notification
+  // and do what we have to do for test in the first nest.
+  const firstNestOperator = () => {
+    info("Start to operate at first nest");
+
+    // Remove itself to avoid listening more.
+    removePlacesListener(firstNestOperator);
+
+    info("Add/Remove test listeners at first nest");
+    removePlacesListener(addRootRemoveFirst.handle);
+    addPlacesListener(addFirst.handle);
+    addPlacesListener(addFirstRemoveSecond.handle);
+
+    // Add second nest operator.
+    addPlacesListener(secondNestOperator);
+
+    info("Send notification at first nest");
+    notifyPlacesEvent("first");
+  };
+
+  // This is a listener listened the first nest notification
+  // and do what we have to do for test in the second nest.
+  const secondNestOperator = () => {
+    info("Start to operate at second nest");
+
+    // Remove itself to avoid listening more.
+    removePlacesListener(secondNestOperator);
+
+    info("Add/Remove test listeners at second nest");
+    removePlacesListener(addRootRemoveSecond.handle);
+    removePlacesListener(addFirstRemoveSecond.handle);
+    addPlacesListener(addSecond.handle);
+
+    info("Send notification at second nest");
+    notifyPlacesEvent("second");
+  };
+
+  info("Add test listeners that handle notification sent at root");
+  addPlacesListener(addRoot.handle);
+  addPlacesListener(addRootRemoveFirst.handle);
+  addPlacesListener(addRootRemoveSecond.handle);
+
+  // Add first nest operator.
+  addPlacesListener(firstNestOperator);
+
+  info("Send notification at root");
+  notifyPlacesEvent("root");
+
+  info("Check whether or not test listeners could get expected notifications");
+  assertNotifications(addRoot.notifications, [
+    [{ guid: "root" }],
+    [{ guid: "first" }],
+    [{ guid: "second" }],
+  ]);
+  assertNotifications(addRootRemoveFirst.notifications, [[{ guid: "root" }]]);
+  assertNotifications(addRootRemoveSecond.notifications, [
+    [{ guid: "root" }],
+    [{ guid: "first" }],
+  ]);
+  assertNotifications(addFirst.notifications, [
+    [{ guid: "first" }],
+    [{ guid: "second" }],
+  ]);
+  assertNotifications(addFirstRemoveSecond.notifications, [
+    [{ guid: "first" }],
+  ]);
+  assertNotifications(addSecond.notifications, [[{ guid: "second" }]]);
+});
+
+function addPlacesListener(listener) {
+  PlacesObservers.addListener(["bookmark-added"], listener);
+}
+
+function removePlacesListener(listener) {
+  PlacesObservers.removeListener(["bookmark-added"], listener);
+}
+
+function notifyPlacesEvent(guid) {
+  PlacesObservers.notifyListeners([
+    new PlacesBookmarkAddition({
+      dateAdded: 0,
+      guid,
+      id: -1,
+      index: 0,
+      isTagging: false,
+      itemType: 1,
+      parentGuid: "fake",
+      parentId: -2,
+      source: 0,
+      title: guid,
+      tags: "tags",
+      url: `http://example.com/${guid}`,
+      frecency: 0,
+      hidden: false,
+      visitCount: 0,
+      lastVisitDate: 0,
+      targetFolderGuid: null,
+      targetFolderItemId: -1,
+      targetFolderTitle: null,
+    }),
+  ]);
+}
+
+class Observer {
+  constructor() {
+    this.notifications = [];
+    this.handle = this.handle.bind(this);
+  }
+
+  handle(events) {
+    this.notifications.push(events);
+  }
+}
+
+/**
+ * Assert notifications the observer received.
+ *
+ * @param Array - notifications
+ * @param Array - expectedNotifications
+ */
+function assertNotifications(notifications, expectedNotifications) {
+  Assert.equal(
+    notifications.length,
+    expectedNotifications.length,
+    "Number of notifications is correct"
+  );
+
+  for (let i = 0; i < notifications.length; i++) {
+    info(`Check notifications[${i}]`);
+    const placesEvents = notifications[i];
+    const expectedPlacesEvents = expectedNotifications[i];
+    assertPlacesEvents(placesEvents, expectedPlacesEvents);
+  }
+}
+
+/**
+ * Assert Places events.
+ * This function checks given expected event field only.
+ *
+ * @param Array - events
+ * @param Array - expectedEvents
+ */
+function assertPlacesEvents(events, expectedEvents) {
+  Assert.equal(
+    events.length,
+    expectedEvents.length,
+    "Number of Places events is correct"
+  );
+
+  for (let i = 0; i < events.length; i++) {
+    info(`Check Places events[${i}]`);
+    const event = events[i];
+    const expectedEvent = expectedEvents[i];
+
+    for (let field in expectedEvent) {
+      Assert.equal(event[field], expectedEvent[field], `${field} is correct`);
+    }
+  }
+}
diff --git a/toolkit/components/places/tests/unit/test_nsINavHistoryViewer.js b/toolkit/components/places/tests/unit/test_nsINavHistoryViewer.js
new file mode 100644
index 0000000000..e98cdbac79
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_nsINavHistoryViewer.js
@@ -0,0 +1,284 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var resultObserver = {
+  insertedNode: null,
+  nodeInserted(parent, node, newIndex) {
+    this.insertedNode = node;
+  },
+  removedNode: null,
+  nodeRemoved(parent, node, oldIndex) {
+    this.removedNode = node;
+  },
+
+  newTitle: "",
+  nodeChangedByTitle: null,
+  nodeTitleChanged(node, newTitle) {
+    this.nodeChangedByTitle = node;
+    this.newTitle = newTitle;
+  },
+
+  newAccessCount: 0,
+  newTime: 0,
+  nodeChangedByHistoryDetails: null,
+  nodeHistoryDetailsChanged(node, oldVisitDate, oldVisitCount) {
+    this.nodeChangedByHistoryDetails = node;
+    this.newTime = node.time;
+    this.newAccessCount = node.accessCount;
+  },
+
+  movedNode: null,
+  nodeMoved(node, oldParent, oldIndex, newParent, newIndex) {
+    this.movedNode = node;
+  },
+  openedContainer: null,
+  closedContainer: null,
+  containerStateChanged(aNode, aOldState, aNewState) {
+    if (aNewState == Ci.nsINavHistoryContainerResultNode.STATE_OPENED) {
+      this.openedContainer = aNode;
+    } else if (aNewState == Ci.nsINavHistoryContainerResultNode.STATE_CLOSED) {
+      this.closedContainer = aNode;
+    }
+  },
+  invalidatedContainer: null,
+  invalidateContainer(node) {
+    this.invalidatedContainer = node;
+  },
+  sortingMode: null,
+  sortingChanged(sortingMode) {
+    this.sortingMode = sortingMode;
+  },
+  inBatchMode: false,
+  batchingCallCount: 0,
+  batching(aToggleMode) {
+    Assert.notEqual(this.inBatchMode, aToggleMode);
+    this.inBatchMode = aToggleMode;
+    this.batchingCallCount++;
+  },
+  result: null,
+  reset() {
+    this.insertedNode = null;
+    this.removedNode = null;
+    this.nodeChangedByTitle = null;
+    this.nodeChangedByHistoryDetails = null;
+    this.replacedNode = null;
+    this.movedNode = null;
+    this.openedContainer = null;
+    this.closedContainer = null;
+    this.invalidatedContainer = null;
+    this.sortingMode = null;
+    this.inBatchMode = false;
+    this.batchingCallCount = 0;
+  },
+};
+
+var testURI = uri("http://mozilla.com");
+
+add_task(async function check_history_query() {
+  let options = PlacesUtils.history.getNewQueryOptions();
+  options.sortingMode = options.SORT_BY_DATE_DESCENDING;
+  options.resultType = options.RESULTS_AS_VISIT;
+  let query = PlacesUtils.history.getNewQuery();
+  let result = PlacesUtils.history.executeQuery(query, options);
+  result.addObserver(resultObserver);
+  let root = result.root;
+  root.containerOpen = true;
+
+  Assert.notEqual(resultObserver.openedContainer, null);
+
+  // nsINavHistoryResultObserver.nodeInserted
+  // add a visit
+  await PlacesTestUtils.addVisits(testURI);
+  Assert.equal(testURI.spec, resultObserver.insertedNode.uri);
+
+  // nsINavHistoryResultObserver.nodeHistoryDetailsChanged
+  // adding a visit causes nodeHistoryDetailsChanged for the folder
+  Assert.equal(root.uri, resultObserver.nodeChangedByHistoryDetails.uri);
+
+  // nsINavHistoryResultObserver.itemTitleChanged for a leaf node
+  await PlacesTestUtils.addVisits({ uri: testURI, title: "baz" });
+  Assert.equal(resultObserver.nodeChangedByTitle.title, "baz");
+
+  // nsINavHistoryResultObserver.nodeRemoved
+  let removedURI = uri("http://google.com");
+  await PlacesTestUtils.addVisits(removedURI);
+  await PlacesUtils.history.remove(removedURI);
+  Assert.equal(removedURI.spec, resultObserver.removedNode.uri);
+
+  // nsINavHistoryResultObserver.invalidateContainer
+  await PlacesUtils.history.removeByFilter({ host: "mozilla.com" });
+  // This test is disabled for bug 1089691. It is failing bcause the new API
+  // doesn't send batching notifications and thus the result doesn't invalidate
+  // the whole container.
+  // Assert.equal(root.uri, resultObserver.invalidatedContainer.uri);
+
+  // nsINavHistoryResultObserver.sortingChanged
+  resultObserver.invalidatedContainer = null;
+  result.sortingMode = options.SORT_BY_TITLE_ASCENDING;
+  Assert.equal(resultObserver.sortingMode, options.SORT_BY_TITLE_ASCENDING);
+  Assert.equal(resultObserver.invalidatedContainer, result.root);
+
+  // nsINavHistoryResultObserver.invalidateContainer
+  await PlacesUtils.history.clear();
+  Assert.equal(root.uri, resultObserver.invalidatedContainer.uri);
+
+  root.containerOpen = false;
+  Assert.equal(resultObserver.closedContainer, resultObserver.openedContainer);
+  result.removeObserver(resultObserver);
+  resultObserver.reset();
+  await PlacesTestUtils.promiseAsyncUpdates();
+});
+
+add_task(async function check_bookmarks_query() {
+  let options = PlacesUtils.history.getNewQueryOptions();
+  let query = PlacesUtils.history.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.menuGuid]);
+  let result = PlacesUtils.history.executeQuery(query, options);
+  result.addObserver(resultObserver);
+  let root = result.root;
+  root.containerOpen = true;
+
+  Assert.notEqual(resultObserver.openedContainer, null);
+
+  // nsINavHistoryResultObserver.nodeInserted
+  // add a bookmark
+  let testBookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: testURI,
+    title: "foo",
+  });
+  Assert.equal("foo", resultObserver.insertedNode.title);
+  Assert.equal(testURI.spec, resultObserver.insertedNode.uri);
+
+  // nsINavHistoryResultObserver.nodeHistoryDetailsChanged
+  // adding a visit causes nodeHistoryDetailsChanged for the folder
+  Assert.equal(root.uri, resultObserver.nodeChangedByHistoryDetails.uri);
+
+  // nsINavHistoryResultObserver.nodeTitleChanged for a leaf node
+  await PlacesUtils.bookmarks.update({
+    guid: testBookmark.guid,
+    title: "baz",
+  });
+  Assert.equal(resultObserver.nodeChangedByTitle.title, "baz");
+  Assert.equal(resultObserver.newTitle, "baz");
+
+  let testBookmark2 = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: "http://google.com",
+    title: "foo",
+  });
+
+  await PlacesUtils.bookmarks.update({
+    guid: testBookmark2.guid,
+    index: 0,
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+  });
+  Assert.equal(resultObserver.movedNode.bookmarkGuid, testBookmark2.guid);
+
+  // nsINavHistoryResultObserver.nodeRemoved
+  await PlacesUtils.bookmarks.remove(testBookmark2.guid);
+  Assert.equal(testBookmark2.guid, resultObserver.removedNode.bookmarkGuid);
+
+  // XXX nsINavHistoryResultObserver.invalidateContainer
+
+  // nsINavHistoryResultObserver.sortingChanged
+  resultObserver.invalidatedContainer = null;
+  result.sortingMode = Ci.nsINavHistoryQueryOptions.SORT_BY_TITLE_ASCENDING;
+  Assert.equal(
+    resultObserver.sortingMode,
+    Ci.nsINavHistoryQueryOptions.SORT_BY_TITLE_ASCENDING
+  );
+  Assert.equal(resultObserver.invalidatedContainer, result.root);
+
+  root.containerOpen = false;
+  Assert.equal(resultObserver.closedContainer, resultObserver.openedContainer);
+  result.removeObserver(resultObserver);
+  resultObserver.reset();
+  await PlacesTestUtils.promiseAsyncUpdates();
+});
+
+add_task(async function check_mixed_query() {
+  let options = PlacesUtils.history.getNewQueryOptions();
+  let query = PlacesUtils.history.getNewQuery();
+  let result = PlacesUtils.history.executeQuery(query, options);
+  result.addObserver(resultObserver);
+  let root = result.root;
+  root.containerOpen = true;
+
+  Assert.notEqual(resultObserver.openedContainer, null);
+
+  root.containerOpen = false;
+  Assert.equal(resultObserver.closedContainer, resultObserver.openedContainer);
+  result.removeObserver(resultObserver);
+  resultObserver.reset();
+  await PlacesTestUtils.promiseAsyncUpdates();
+});
+
+add_task(async function check_a_batch_process() {
+  const options = PlacesUtils.history.getNewQueryOptions();
+  const query = PlacesUtils.history.getNewQuery();
+  const result = PlacesUtils.history.executeQuery(query, options);
+  result.addObserver(resultObserver);
+
+  info("Check initial state");
+  Assert.equal(resultObserver.inBatchMode, false);
+  Assert.equal(resultObserver.batchingCallCount, 0);
+
+  info("Check whether batching is called when call onBeginUpdateBatch");
+  result.onBeginUpdateBatch();
+  Assert.equal(resultObserver.inBatchMode, true);
+  Assert.equal(resultObserver.batchingCallCount, 1);
+
+  info("Check whether batching is called when call onEndUpdateBatch");
+  result.onEndUpdateBatch();
+  Assert.equal(resultObserver.inBatchMode, false);
+  Assert.equal(resultObserver.batchingCallCount, 2);
+
+  result.removeObserver(resultObserver);
+  resultObserver.reset();
+  await PlacesTestUtils.promiseAsyncUpdates();
+});
+
+add_task(async function check_multi_batch_processes() {
+  const options = PlacesUtils.history.getNewQueryOptions();
+  const query = PlacesUtils.history.getNewQuery();
+  const result = PlacesUtils.history.executeQuery(query, options);
+  result.addObserver(resultObserver);
+
+  info("Check initial state");
+  Assert.equal(resultObserver.inBatchMode, false);
+  Assert.equal(resultObserver.batchingCallCount, 0);
+
+  info("Check whether batching is called when calling onBeginUpdateBatch");
+  result.onBeginUpdateBatch();
+  Assert.equal(resultObserver.inBatchMode, true);
+  Assert.equal(resultObserver.batchingCallCount, 1);
+
+  info(
+    "Check whether batching is not called when calling onBeginUpdateBatch again"
+  );
+  result.onBeginUpdateBatch();
+  Assert.equal(resultObserver.inBatchMode, true);
+  Assert.equal(resultObserver.batchingCallCount, 1);
+
+  info(
+    "Check whether batching is not called until calling onEndUpdateBatch the same number times that onBeginUpdateBatch is called"
+  );
+  result.onEndUpdateBatch();
+  Assert.equal(resultObserver.inBatchMode, true);
+  Assert.equal(resultObserver.batchingCallCount, 1);
+
+  info(
+    "Check whether batching is called when calling onEndUpdateBatch the same number times"
+  );
+  result.onEndUpdateBatch();
+  Assert.equal(resultObserver.inBatchMode, false);
+  Assert.equal(resultObserver.batchingCallCount, 2);
+
+  result.removeObserver(resultObserver);
+  resultObserver.reset();
+  await PlacesTestUtils.promiseAsyncUpdates();
+});
diff --git a/toolkit/components/places/tests/unit/test_null_interfaces.js b/toolkit/components/places/tests/unit/test_null_interfaces.js
new file mode 100644
index 0000000000..f5608285d6
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_null_interfaces.js
@@ -0,0 +1,105 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Test bug 489872 to make sure passing nulls to nsNavHistory doesn't crash.
+ */
+
+// Make an array of services to test, each specifying a class id, interface
+// and an array of function names that don't throw when passed nulls
+var testServices = [
+  [
+    "browser/nav-history-service;1",
+    ["nsINavHistoryService"],
+    [
+      "queryStringToQuery",
+      "removePagesByTimeframe",
+      "removePagesFromHost",
+      "getObservers",
+    ],
+  ],
+  [
+    "browser/nav-bookmarks-service;1",
+    ["nsINavBookmarksService"],
+    ["createFolder", "getObservers"],
+  ],
+  ["browser/favicon-service;1", ["nsIFaviconService"], []],
+  ["browser/tagging-service;1", ["nsITaggingService"], []],
+];
+info(testServices.join("\n"));
+
+function run_test() {
+  for (let [cid, ifaces, nothrow] of testServices) {
+    info(`Running test with ${cid} ${ifaces.join(", ")} ${nothrow}`);
+    let s = Cc["@mozilla.org/" + cid].getService(Ci.nsISupports);
+    for (let iface of ifaces) {
+      s.QueryInterface(Ci[iface]);
+    }
+
+    let okName = function (name) {
+      info(`Checking if function is okay to test: ${name}`);
+      let func = s[name];
+
+      let mesg = "";
+      if (typeof func != "function") {
+        mesg = "Not a function!";
+      } else if (!func.length) {
+        mesg = "No args needed!";
+      } else if (name == "QueryInterface") {
+        mesg = "Ignore QI!";
+      }
+
+      if (mesg) {
+        info(`${mesg} Skipping: ${name}`);
+        return false;
+      }
+
+      return true;
+    };
+
+    info(`Generating an array of functions to test service: ${s}`);
+    for (let n of Object.keys(s)
+      .filter(i => okName(i))
+      .sort()) {
+      info(`\nTesting ${ifaces.join(", ")} function with null args: ${n}`);
+
+      let func = s[n];
+      let num = func.length;
+      info(`Generating array of nulls for #args: ${num}`);
+      let args = Array(num).fill(null);
+
+      let tryAgain = true;
+      while (tryAgain) {
+        try {
+          info(`Calling with args: ${JSON.stringify(args)}`);
+          func.apply(s, args);
+
+          info(
+            `The function did not throw! Is it one of the nothrow? ${nothrow}`
+          );
+          Assert.notEqual(nothrow.indexOf(n), -1);
+
+          info("Must have been an expected nothrow, so no need to try again");
+          tryAgain = false;
+        } catch (ex) {
+          if (ex.result == Cr.NS_ERROR_ILLEGAL_VALUE) {
+            info(`Caught an expected exception: ${ex.name}`);
+            info("Moving on to the next test..");
+            tryAgain = false;
+          } else if (ex.result == Cr.NS_ERROR_XPC_NEED_OUT_OBJECT) {
+            let pos = Number(ex.message.match(/object arg (\d+)/)[1]);
+            info(`Function call expects an out object at ${pos}`);
+            args[pos] = {};
+          } else if (ex.result == Cr.NS_ERROR_NOT_IMPLEMENTED) {
+            info(`Method not implemented exception: ${ex.name}`);
+            info("Moving on to the next test..");
+            tryAgain = false;
+          } else {
+            throw ex;
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/toolkit/components/places/tests/unit/test_origins.js b/toolkit/components/places/tests/unit/test_origins.js
new file mode 100644
index 0000000000..67b6d59c7d
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_origins.js
@@ -0,0 +1,1113 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Makes sure the moz_origins table and origin frecency stats are updated
+// correctly.
+
+"use strict";
+
+// Visiting a URL with a new origin should immediately update moz_origins.
+add_task(async function visit() {
+  await checkDB([]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/" }]);
+  await checkDB([["http://", "example.com", ["http://example.com/"]]]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Repeatedly visiting a URL with an initially new origin should update
+// moz_origins (with the correct frecency).
+add_task(async function visitRepeatedly() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example.com/" },
+    { uri: "http://example.com/" },
+    { uri: "http://example.com/" },
+  ]);
+  await checkDB([["http://", "example.com", ["http://example.com/"]]]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Same as previous, but visits are added sequentially.
+add_task(async function visitRepeatedlySequential() {
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/" }]);
+  await checkDB([["http://", "example.com", ["http://example.com/"]]]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/" }]);
+  await checkDB([["http://", "example.com", ["http://example.com/"]]]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/" }]);
+  await checkDB([["http://", "example.com", ["http://example.com/"]]]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// After removing an origin's URLs, visiting a URL with the origin should
+// immediately update moz_origins.
+add_task(async function vistAfterDelete() {
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/" }]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/" }]);
+  await checkDB([["http://", "example.com", ["http://example.com/"]]]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Visiting different URLs with the same origin should update moz_origins, and
+// moz_origins.frecency should be the sum of the URL frecencies.
+add_task(async function visitDifferentURLsSameOrigin() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example.com/1" },
+    { uri: "http://example.com/2" },
+    { uri: "http://example.com/3" },
+  ]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/1", "http://example.com/2", "http://example.com/3"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/1");
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/2", "http://example.com/3"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/2");
+  await checkDB([["http://", "example.com", ["http://example.com/3"]]]);
+  await PlacesUtils.history.remove("http://example.com/3");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Same as previous, but visits are added sequentially.
+add_task(async function visitDifferentURLsSameOriginSequential() {
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/1" }]);
+  await checkDB([["http://", "example.com", ["http://example.com/1"]]]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/2" }]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/1", "http://example.com/2"],
+    ],
+  ]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/3" }]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/1", "http://example.com/2", "http://example.com/3"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/1");
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/2", "http://example.com/3"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/2");
+  await checkDB([["http://", "example.com", ["http://example.com/3"]]]);
+  await PlacesUtils.history.remove("http://example.com/3");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Repeatedly visiting different URLs with the same origin should update
+// moz_origins (with the correct frecencies), and moz_origins.frecency should be
+// the sum of the URL frecencies.
+add_task(async function visitDifferentURLsSameOriginRepeatedly() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example.com/1" },
+    { uri: "http://example.com/1" },
+    { uri: "http://example.com/1" },
+    { uri: "http://example.com/2" },
+    { uri: "http://example.com/2" },
+    { uri: "http://example.com/3" },
+  ]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/1", "http://example.com/2", "http://example.com/3"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/1");
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/2", "http://example.com/3"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/2");
+  await checkDB([["http://", "example.com", ["http://example.com/3"]]]);
+  await PlacesUtils.history.remove("http://example.com/3");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Visiting URLs with different origins should update moz_origins.
+add_task(async function visitDifferentOrigins() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example1.com/" },
+    { uri: "http://example2.com/" },
+    { uri: "http://example3.com/" },
+  ]);
+  await checkDB([
+    ["http://", "example1.com", ["http://example1.com/"]],
+    ["http://", "example2.com", ["http://example2.com/"]],
+    ["http://", "example3.com", ["http://example3.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/");
+  await checkDB([
+    ["http://", "example2.com", ["http://example2.com/"]],
+    ["http://", "example3.com", ["http://example3.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/");
+  await checkDB([["http://", "example3.com", ["http://example3.com/"]]]);
+  await PlacesUtils.history.remove("http://example3.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Same as previous, but visits are added sequentially.
+add_task(async function visitDifferentOriginsSequential() {
+  await PlacesTestUtils.addVisits([{ uri: "http://example1.com/" }]);
+  await checkDB([["http://", "example1.com", ["http://example1.com/"]]]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example2.com/" }]);
+  await checkDB([
+    ["http://", "example1.com", ["http://example1.com/"]],
+    ["http://", "example2.com", ["http://example2.com/"]],
+  ]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example3.com/" }]);
+  await checkDB([
+    ["http://", "example1.com", ["http://example1.com/"]],
+    ["http://", "example2.com", ["http://example2.com/"]],
+    ["http://", "example3.com", ["http://example3.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/");
+  await checkDB([
+    ["http://", "example2.com", ["http://example2.com/"]],
+    ["http://", "example3.com", ["http://example3.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/");
+  await checkDB([["http://", "example3.com", ["http://example3.com/"]]]);
+  await PlacesUtils.history.remove("http://example3.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Repeatedly visiting URLs with different origins should update moz_origins
+// (with the correct frecencies).
+add_task(async function visitDifferentOriginsRepeatedly() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example1.com/" },
+    { uri: "http://example1.com/" },
+    { uri: "http://example1.com/" },
+    { uri: "http://example2.com/" },
+    { uri: "http://example2.com/" },
+    { uri: "http://example3.com/" },
+  ]);
+  await checkDB([
+    ["http://", "example1.com", ["http://example1.com/"]],
+    ["http://", "example2.com", ["http://example2.com/"]],
+    ["http://", "example3.com", ["http://example3.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/");
+  await checkDB([
+    ["http://", "example2.com", ["http://example2.com/"]],
+    ["http://", "example3.com", ["http://example3.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/");
+  await checkDB([["http://", "example3.com", ["http://example3.com/"]]]);
+  await PlacesUtils.history.remove("http://example3.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Visiting URLs, some with the same and some with different origins, should
+// update moz_origins.
+add_task(async function visitDifferentOriginsDifferentURLs() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example1.com/1" },
+    { uri: "http://example1.com/2" },
+    { uri: "http://example1.com/3" },
+    { uri: "http://example2.com/1" },
+    { uri: "http://example2.com/2" },
+    { uri: "http://example3.com/1" },
+  ]);
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      [
+        "http://example1.com/1",
+        "http://example1.com/2",
+        "http://example1.com/3",
+      ],
+    ],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/1");
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      ["http://example1.com/2", "http://example1.com/3"],
+    ],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/2");
+  await checkDB([
+    ["http://", "example1.com", ["http://example1.com/3"]],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/3");
+  await checkDB([
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/1");
+  await checkDB([
+    ["http://", "example2.com", ["http://example2.com/2"]],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/2");
+  await checkDB([["http://", "example3.com", ["http://example3.com/1"]]]);
+  await PlacesUtils.history.remove("http://example3.com/1");
+  await checkDB([]);
+});
+
+// Same as previous, but visits are added sequentially.
+add_task(async function visitDifferentOriginsDifferentURLsSequential() {
+  await PlacesTestUtils.addVisits([{ uri: "http://example1.com/1" }]);
+  await checkDB([["http://", "example1.com", ["http://example1.com/1"]]]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example1.com/2" }]);
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      ["http://example1.com/1", "http://example1.com/2"],
+    ],
+  ]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example1.com/3" }]);
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      [
+        "http://example1.com/1",
+        "http://example1.com/2",
+        "http://example1.com/3",
+      ],
+    ],
+  ]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example2.com/1" }]);
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      [
+        "http://example1.com/1",
+        "http://example1.com/2",
+        "http://example1.com/3",
+      ],
+    ],
+    ["http://", "example2.com", ["http://example2.com/1"]],
+  ]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example2.com/2" }]);
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      [
+        "http://example1.com/1",
+        "http://example1.com/2",
+        "http://example1.com/3",
+      ],
+    ],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+  ]);
+  await PlacesTestUtils.addVisits([{ uri: "http://example3.com/1" }]);
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      [
+        "http://example1.com/1",
+        "http://example1.com/2",
+        "http://example1.com/3",
+      ],
+    ],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/1");
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      ["http://example1.com/2", "http://example1.com/3"],
+    ],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/2");
+  await checkDB([
+    ["http://", "example1.com", ["http://example1.com/3"]],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/3");
+  await checkDB([
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/1");
+  await checkDB([
+    ["http://", "example2.com", ["http://example2.com/2"]],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/2");
+  await checkDB([["http://", "example3.com", ["http://example3.com/1"]]]);
+  await PlacesUtils.history.remove("http://example3.com/1");
+  await checkDB([]);
+});
+
+// Repeatedly visiting URLs, some with the same and some with different origins,
+// should update moz_origins (with the correct frecencies).
+add_task(async function visitDifferentOriginsDifferentURLsRepeatedly() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example1.com/1" },
+    { uri: "http://example1.com/1" },
+    { uri: "http://example1.com/1" },
+    { uri: "http://example1.com/2" },
+    { uri: "http://example1.com/2" },
+    { uri: "http://example1.com/3" },
+    { uri: "http://example2.com/1" },
+    { uri: "http://example2.com/1" },
+    { uri: "http://example2.com/1" },
+    { uri: "http://example2.com/2" },
+    { uri: "http://example2.com/2" },
+    { uri: "http://example3.com/1" },
+    { uri: "http://example3.com/1" },
+  ]);
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      [
+        "http://example1.com/1",
+        "http://example1.com/2",
+        "http://example1.com/3",
+      ],
+    ],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/1");
+  await checkDB([
+    [
+      "http://",
+      "example1.com",
+      ["http://example1.com/2", "http://example1.com/3"],
+    ],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/2");
+  await checkDB([
+    ["http://", "example1.com", ["http://example1.com/3"]],
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example1.com/3");
+  await checkDB([
+    [
+      "http://",
+      "example2.com",
+      ["http://example2.com/1", "http://example2.com/2"],
+    ],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/1");
+  await checkDB([
+    ["http://", "example2.com", ["http://example2.com/2"]],
+    ["http://", "example3.com", ["http://example3.com/1"]],
+  ]);
+  await PlacesUtils.history.remove("http://example2.com/2");
+  await checkDB([["http://", "example3.com", ["http://example3.com/1"]]]);
+  await PlacesUtils.history.remove("http://example3.com/1");
+  await checkDB([]);
+});
+
+// Makes sure URIs with the same TLD but different www subdomains are recognized
+// as different origins.  Makes sure removing one doesn't remove the others.
+add_task(async function www1() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example.com/" },
+    { uri: "http://www.example.com/" },
+    { uri: "http://www.www.example.com/" },
+  ]);
+  await checkDB([
+    ["http://", "example.com", ["http://example.com/"]],
+    ["http://", "www.example.com", ["http://www.example.com/"]],
+    ["http://", "www.www.example.com", ["http://www.www.example.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([
+    ["http://", "www.example.com", ["http://www.example.com/"]],
+    ["http://", "www.www.example.com", ["http://www.www.example.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://www.example.com/");
+  await checkDB([
+    ["http://", "www.www.example.com", ["http://www.www.example.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://www.www.example.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Same as www1, but removes URIs in a different order.
+add_task(async function www2() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example.com/" },
+    { uri: "http://www.example.com/" },
+    { uri: "http://www.www.example.com/" },
+  ]);
+  await checkDB([
+    ["http://", "example.com", ["http://example.com/"]],
+    ["http://", "www.example.com", ["http://www.example.com/"]],
+    ["http://", "www.www.example.com", ["http://www.www.example.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://www.www.example.com/");
+  await checkDB([
+    ["http://", "example.com", ["http://example.com/"]],
+    ["http://", "www.example.com", ["http://www.example.com/"]],
+  ]);
+  await PlacesUtils.history.remove("http://www.example.com/");
+  await checkDB([["http://", "example.com", ["http://example.com/"]]]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Makes sure removing an origin without a port doesn't remove the same host
+// with a port.
+add_task(async function ports1() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example.com/" },
+    { uri: "http://example.com:8888/" },
+  ]);
+  await checkDB([
+    ["http://", "example.com", ["http://example.com/"]],
+    ["http://", "example.com:8888", ["http://example.com:8888/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([
+    ["http://", "example.com:8888", ["http://example.com:8888/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example.com:8888/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Makes sure removing an origin with a port doesn't remove the same host
+// without a port.
+add_task(async function ports2() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example.com/" },
+    { uri: "http://example.com:8888/" },
+  ]);
+  await checkDB([
+    ["http://", "example.com", ["http://example.com/"]],
+    ["http://", "example.com:8888", ["http://example.com:8888/"]],
+  ]);
+  await PlacesUtils.history.remove("http://example.com:8888/");
+  await checkDB([["http://", "example.com", ["http://example.com/"]]]);
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Makes sure multiple URIs with the same origin don't create duplicate origins.
+add_task(async function duplicates() {
+  await PlacesTestUtils.addVisits([
+    { uri: "http://example.com/" },
+    { uri: "http://www.example.com/" },
+    { uri: "http://www.www.example.com/" },
+    { uri: "https://example.com/" },
+    { uri: "ftp://example.com/" },
+    { uri: "foo://example.com/" },
+    { uri: "bar:example.com/" },
+    { uri: "http://example.com:8888/" },
+
+    { uri: "http://example.com/dupe" },
+    { uri: "http://www.example.com/dupe" },
+    { uri: "http://www.www.example.com/dupe" },
+    { uri: "https://example.com/dupe" },
+    { uri: "ftp://example.com/dupe" },
+    { uri: "foo://example.com/dupe" },
+    { uri: "bar:example.com/dupe" },
+    { uri: "http://example.com:8888/dupe" },
+  ]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/", "http://example.com/dupe"],
+    ],
+    [
+      "http://",
+      "www.example.com",
+      ["http://www.example.com/", "http://www.example.com/dupe"],
+    ],
+    [
+      "http://",
+      "www.www.example.com",
+      ["http://www.www.example.com/", "http://www.www.example.com/dupe"],
+    ],
+    [
+      "https://",
+      "example.com",
+      ["https://example.com/", "https://example.com/dupe"],
+    ],
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+
+  await PlacesUtils.history.remove("http://example.com/");
+  await checkDB([
+    ["http://", "example.com", ["http://example.com/dupe"]],
+    [
+      "http://",
+      "www.example.com",
+      ["http://www.example.com/", "http://www.example.com/dupe"],
+    ],
+    [
+      "http://",
+      "www.www.example.com",
+      ["http://www.www.example.com/", "http://www.www.example.com/dupe"],
+    ],
+    [
+      "https://",
+      "example.com",
+      ["https://example.com/", "https://example.com/dupe"],
+    ],
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://example.com/dupe");
+  await checkDB([
+    [
+      "http://",
+      "www.example.com",
+      ["http://www.example.com/", "http://www.example.com/dupe"],
+    ],
+    [
+      "http://",
+      "www.www.example.com",
+      ["http://www.www.example.com/", "http://www.www.example.com/dupe"],
+    ],
+    [
+      "https://",
+      "example.com",
+      ["https://example.com/", "https://example.com/dupe"],
+    ],
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+
+  await PlacesUtils.history.remove("http://www.example.com/");
+  await checkDB([
+    ["http://", "www.example.com", ["http://www.example.com/dupe"]],
+    [
+      "http://",
+      "www.www.example.com",
+      ["http://www.www.example.com/", "http://www.www.example.com/dupe"],
+    ],
+    [
+      "https://",
+      "example.com",
+      ["https://example.com/", "https://example.com/dupe"],
+    ],
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://www.example.com/dupe");
+  await checkDB([
+    [
+      "http://",
+      "www.www.example.com",
+      ["http://www.www.example.com/", "http://www.www.example.com/dupe"],
+    ],
+    [
+      "https://",
+      "example.com",
+      ["https://example.com/", "https://example.com/dupe"],
+    ],
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+
+  await PlacesUtils.history.remove("http://www.www.example.com/");
+  await checkDB([
+    ["http://", "www.www.example.com", ["http://www.www.example.com/dupe"]],
+    [
+      "https://",
+      "example.com",
+      ["https://example.com/", "https://example.com/dupe"],
+    ],
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("http://www.www.example.com/dupe");
+  await checkDB([
+    [
+      "https://",
+      "example.com",
+      ["https://example.com/", "https://example.com/dupe"],
+    ],
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+
+  await PlacesUtils.history.remove("https://example.com/");
+  await checkDB([
+    ["https://", "example.com", ["https://example.com/dupe"]],
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("https://example.com/dupe");
+  await checkDB([
+    ["ftp://", "example.com", ["ftp://example.com/", "ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+
+  await PlacesUtils.history.remove("ftp://example.com/");
+  await checkDB([
+    ["ftp://", "example.com", ["ftp://example.com/dupe"]],
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("ftp://example.com/dupe");
+  await checkDB([
+    ["foo://", "example.com", ["foo://example.com/", "foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+
+  await PlacesUtils.history.remove("foo://example.com/");
+  await checkDB([
+    ["foo://", "example.com", ["foo://example.com/dupe"]],
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("foo://example.com/dupe");
+  await checkDB([
+    ["bar:", "example.com", ["bar:example.com/", "bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+
+  await PlacesUtils.history.remove("bar:example.com/");
+  await checkDB([
+    ["bar:", "example.com", ["bar:example.com/dupe"]],
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+  await PlacesUtils.history.remove("bar:example.com/dupe");
+  await checkDB([
+    [
+      "http://",
+      "example.com:8888",
+      ["http://example.com:8888/", "http://example.com:8888/dupe"],
+    ],
+  ]);
+
+  await PlacesUtils.history.remove("http://example.com:8888/");
+  await checkDB([
+    ["http://", "example.com:8888", ["http://example.com:8888/dupe"]],
+  ]);
+  await PlacesUtils.history.remove("http://example.com:8888/dupe");
+  await checkDB([]);
+
+  await cleanUp();
+});
+
+// Makes sure adding and removing bookmarks creates origins.
+add_task(async function addRemoveBookmarks() {
+  let bookmarks = [];
+  let urls = ["http://example.com/", "http://www.example.com/"];
+  for (let url of urls) {
+    bookmarks.push(
+      await PlacesUtils.bookmarks.insert({
+        url,
+        parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+      })
+    );
+  }
+  await checkDB([
+    ["http://", "example.com", ["http://example.com/"]],
+    ["http://", "www.example.com", ["http://www.example.com/"]],
+  ]);
+  await PlacesUtils.bookmarks.remove(bookmarks[0]);
+  await PlacesUtils.history.clear();
+  await checkDB([["http://", "www.example.com", ["http://www.example.com/"]]]);
+  await PlacesUtils.bookmarks.remove(bookmarks[1]);
+  await PlacesUtils.history.clear();
+  await checkDB([]);
+  await cleanUp();
+});
+
+// Makes sure changing bookmarks also changes the corresponding origins.
+add_task(async function changeBookmarks() {
+  let bookmarks = [];
+  let urls = ["http://example.com/", "http://www.example.com/"];
+  for (let url of urls) {
+    bookmarks.push(
+      await PlacesUtils.bookmarks.insert({
+        url,
+        parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+      })
+    );
+  }
+  await checkDB([
+    ["http://", "example.com", ["http://example.com/"]],
+    ["http://", "www.example.com", ["http://www.example.com/"]],
+  ]);
+  await PlacesUtils.bookmarks.update({
+    url: "http://www.example.com/",
+    guid: bookmarks[0].guid,
+  });
+  await PlacesUtils.history.clear();
+  await checkDB([["http://", "www.example.com", ["http://www.example.com/"]]]);
+  await cleanUp();
+});
+
+// A slightly more complex test to make sure origin frecency stats are updated
+// when visits and bookmarks are added and removed.
+add_task(async function moreOriginFrecencyStats() {
+  await checkDB([]);
+
+  // Add a URL 0 visit.
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/0" }]);
+  await checkDB([["http://", "example.com", ["http://example.com/0"]]]);
+
+  // Add a URL 1 visit.
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/1" }]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/0", "http://example.com/1"],
+    ],
+  ]);
+
+  // Add a URL 2 visit.
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/2" }]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/0", "http://example.com/1", "http://example.com/2"],
+    ],
+  ]);
+
+  // Add another URL 2 visit.
+  await PlacesTestUtils.addVisits([{ uri: "http://example.com/2" }]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/0", "http://example.com/1", "http://example.com/2"],
+    ],
+  ]);
+
+  // Remove URL 2's visits.
+  await PlacesUtils.history.remove(["http://example.com/2"]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/0", "http://example.com/1"],
+    ],
+  ]);
+
+  // Bookmark URL 1.
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "A bookmark",
+    url: NetUtil.newURI("http://example.com/1"),
+  });
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/0", "http://example.com/1"],
+    ],
+  ]);
+
+  // Remove URL 1's visit.
+  await PlacesUtils.history.remove(["http://example.com/1"]);
+  await checkDB([
+    [
+      "http://",
+      "example.com",
+      ["http://example.com/0", "http://example.com/1"],
+    ],
+  ]);
+
+  // Remove URL 1's bookmark.  Also need to call history.remove() again to
+  // remove the URL from moz_places.  Otherwise it sticks around and keeps
+  // contributing to the frecency stats.
+  await PlacesUtils.bookmarks.remove(bookmark);
+  await PlacesUtils.history.remove("http://example.com/1");
+  await checkDB([["http://", "example.com", ["http://example.com/0"]]]);
+
+  // Remove URL 0.
+  await PlacesUtils.history.remove(["http://example.com/0"]);
+  await checkDB([]);
+
+  await cleanUp();
+});
+
+/**
+ * Returns the expected frecency of the origin of the given URLs, i.e., the sum
+ * of their frecencies.  Each URL is expected to have the same origin.
+ *
+ * @param  urls
+ *         An array of URL strings.
+ * @return The expected origin frecency.
+ */
+async function expectedOriginFrecency(urls) {
+  let value = 0;
+  for (let url of urls) {
+    let v = Math.max(
+      await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", { url }),
+      0
+    );
+    value += v;
+  }
+  return value;
+}
+
+/**
+ * Asserts that the moz_origins table and the origin frecency stats are correct.
+ *
+ * @param expectedOrigins
+ *        An array of expected origins.  Each origin in the array is itself an
+ *        array that looks like this:
+ *          [prefix, host, [url1, url2, ..., urln]]
+ *        The element at index 2 is an array of all the URLs with the origin.
+ *        If you don't care about checking frecencies and origin frecency stats,
+ *        this element can be `undefined`.
+ */
+async function checkDB(expectedOrigins) {
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+
+  let db = await PlacesUtils.promiseDBConnection();
+  let rows = await db.execute(`
+    SELECT prefix, host, frecency
+    FROM moz_origins
+    ORDER BY id ASC
+  `);
+  let checkFrecencies =
+    !expectedOrigins.length || expectedOrigins[0][2] !== undefined;
+  let actualOrigins = rows.map(row => {
+    let o = [];
+    for (let c = 0; c < (checkFrecencies ? 3 : 2); c++) {
+      o.push(row.getResultByIndex(c));
+    }
+    return o;
+  });
+  let expected = [];
+  for (let origin of expectedOrigins) {
+    expected.push(
+      origin
+        .slice(0, 2)
+        .concat(checkFrecencies ? await expectedOriginFrecency(origin[2]) : [])
+    );
+  }
+  Assert.deepEqual(actualOrigins, expected);
+  if (checkFrecencies) {
+    await checkStats(expected.map(o => o[2]).filter(o => o > 0));
+  }
+}
+
+/**
+ * Asserts that the origin frecency stats are correct.
+ *
+ * @param expectedOriginFrecencies
+ *        An array of expected origin frecencies.
+ */
+async function checkStats(expectedOriginFrecencies) {
+  let stats = await promiseStats();
+  Assert.equal(stats.count, expectedOriginFrecencies.length);
+  Assert.equal(
+    stats.sum,
+    expectedOriginFrecencies.reduce((sum, f) => sum + f, 0)
+  );
+  Assert.equal(
+    stats.squares,
+    expectedOriginFrecencies.reduce((squares, f) => squares + f * f, 0)
+  );
+}
+
+/**
+ * Returns the origin frecency stats.
+ *
+ * @return An object: { count, sum, squares }
+ */
+async function promiseStats() {
+  let db = await PlacesUtils.promiseDBConnection();
+  let rows = await db.execute(`
+    SELECT
+      IFNULL((SELECT value FROM moz_meta WHERE key = 'origin_frecency_count'), 0),
+      IFNULL((SELECT value FROM moz_meta WHERE key = 'origin_frecency_sum'), 0),
+      IFNULL((SELECT value FROM moz_meta WHERE key = 'origin_frecency_sum_of_squares'), 0)
+  `);
+  return {
+    count: rows[0].getResultByIndex(0),
+    sum: rows[0].getResultByIndex(1),
+    squares: rows[0].getResultByIndex(2),
+  };
+}
+
+async function cleanUp() {
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+}
diff --git a/toolkit/components/places/tests/unit/test_origins_parsing.js b/toolkit/components/places/tests/unit/test_origins_parsing.js
new file mode 100644
index 0000000000..35ba8bdd0d
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_origins_parsing.js
@@ -0,0 +1,104 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// This test is a companion to test_origins.js.  It adds many URLs to the
+// database and makes sure that their prefixes and hosts are correctly parsed.
+// This test can take a while to run, which is why it's split out from
+// test_origins.js.
+
+"use strict";
+
+add_task(async function parsing() {
+  let prefixes = ["http://", "https://", "ftp://", "foo://", "bar:"];
+
+  let userinfos = ["", "user:pass@", "user:pass:word@", "user:@"];
+
+  let ports = ["", ":8888"];
+
+  let paths = [
+    "",
+
+    "/",
+    "/1",
+    "/1/2",
+
+    "?",
+    "?1",
+    "#",
+    "#1",
+
+    "/?",
+    "/1?",
+    "/?1",
+    "/1?2",
+
+    "/#",
+    "/1#",
+    "/#1",
+    "/1#2",
+
+    "/?#",
+    "/1?#",
+    "/?1#",
+    "/?#1",
+    "/1?2#",
+    "/1?#2",
+    "/?1#2",
+  ];
+
+  for (let userinfo of userinfos) {
+    for (let port of ports) {
+      for (let path of paths) {
+        info(`Testing userinfo='${userinfo}' port='${port}' path='${path}'`);
+        let expectedOrigins = prefixes.map(prefix => [
+          prefix,
+          "example.com" + port,
+        ]);
+        let uris = expectedOrigins.map(
+          ([prefix, hostPort]) => prefix + userinfo + hostPort + path
+        );
+
+        await PlacesTestUtils.addVisits(uris.map(uri => ({ uri })));
+        await checkDB(expectedOrigins);
+
+        // Remove each URI, one at a time, and make sure the remaining origins
+        // in the database are correct.
+        for (let i = 0; i < uris.length; i++) {
+          await PlacesUtils.history.remove(uris[i]);
+          await checkDB(expectedOrigins.slice(i + 1, expectedOrigins.length));
+        }
+        await cleanUp();
+      }
+    }
+  }
+  await checkDB([]);
+});
+
+/**
+ * Asserts that the moz_origins table is correct.
+ *
+ * @param expectedOrigins
+ *        An array of expected origins.  Each origin in the array is itself an
+ *        array that looks like this: [prefix, host]
+ */
+async function checkDB(expectedOrigins) {
+  let db = await PlacesUtils.promiseDBConnection();
+  let rows = await db.execute(`
+    SELECT prefix, host
+    FROM moz_origins
+    ORDER BY id ASC
+  `);
+  let actualOrigins = rows.map(row => {
+    let o = [];
+    for (let c = 0; c < 2; c++) {
+      o.push(row.getResultByIndex(c));
+    }
+    return o;
+  });
+  Assert.deepEqual(actualOrigins, expectedOrigins);
+}
+
+async function cleanUp() {
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+}
diff --git a/toolkit/components/places/tests/unit/test_pageGuid_bookmarkGuid.js b/toolkit/components/places/tests/unit/test_pageGuid_bookmarkGuid.js
new file mode 100644
index 0000000000..e1fa64a88c
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_pageGuid_bookmarkGuid.js
@@ -0,0 +1,256 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const histsvc = PlacesUtils.history;
+
+add_task(async function test_addBookmarksAndCheckGuids() {
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.menuGuid,
+    children: [
+      {
+        title: "test folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            url: "http://test1.com/",
+            title: "1 title",
+          },
+          {
+            url: "http://test2.com/",
+            title: "2 title",
+          },
+          {
+            url: "http://test3.com/",
+            title: "3 title",
+          },
+          {
+            type: PlacesUtils.bookmarks.TYPE_SEPARATOR,
+          },
+          {
+            title: "test folder 2",
+            type: PlacesUtils.bookmarks.TYPE_FOLDER,
+          },
+        ],
+      },
+    ],
+  });
+
+  let root = PlacesUtils.getFolderContents(bookmarks[0].guid).root;
+  Assert.equal(root.childCount, 5);
+
+  // check bookmark guids
+  let bookmarkGuidZero = root.getChild(0).bookmarkGuid;
+  Assert.equal(bookmarkGuidZero.length, 12);
+  // bookmarks have bookmark guids
+  Assert.equal(root.getChild(1).bookmarkGuid.length, 12);
+  Assert.equal(root.getChild(2).bookmarkGuid.length, 12);
+  // separator has bookmark guid
+  Assert.equal(root.getChild(3).bookmarkGuid.length, 12);
+  // folder has bookmark guid
+  Assert.equal(root.getChild(4).bookmarkGuid.length, 12);
+  // all bookmark guids are different.
+  Assert.notEqual(bookmarkGuidZero, root.getChild(1).bookmarkGuid);
+  Assert.notEqual(root.getChild(1).bookmarkGuid, root.getChild(2).bookmarkGuid);
+  Assert.notEqual(root.getChild(2).bookmarkGuid, root.getChild(3).bookmarkGuid);
+  Assert.notEqual(root.getChild(3).bookmarkGuid, root.getChild(4).bookmarkGuid);
+
+  // check page guids
+  let pageGuidZero = root.getChild(0).pageGuid;
+  Assert.equal(pageGuidZero.length, 12);
+  // bookmarks have page guids
+  Assert.equal(root.getChild(1).pageGuid.length, 12);
+  Assert.equal(root.getChild(2).pageGuid.length, 12);
+  // folder and separator don't have page guids
+  Assert.equal(root.getChild(3).pageGuid, "");
+  Assert.equal(root.getChild(4).pageGuid, "");
+
+  Assert.notEqual(pageGuidZero, root.getChild(1).pageGuid);
+  Assert.notEqual(root.getChild(1).pageGuid, root.getChild(2).pageGuid);
+
+  root.containerOpen = false;
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_updateBookmarksAndCheckGuids() {
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.menuGuid,
+    children: [
+      {
+        title: "test folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            url: "http://test1.com/",
+            title: "1 title",
+          },
+          {
+            title: "test folder 2",
+            type: PlacesUtils.bookmarks.TYPE_FOLDER,
+          },
+        ],
+      },
+    ],
+  });
+
+  let root = PlacesUtils.getFolderContents(bookmarks[0].guid).root;
+  Assert.equal(root.childCount, 2);
+
+  // ensure the bookmark and page guids remain the same after modifing other property.
+  let bookmarkGuidZero = root.getChild(0).bookmarkGuid;
+  let pageGuidZero = root.getChild(0).pageGuid;
+  await PlacesUtils.bookmarks.update({
+    guid: bookmarks[1].guid,
+    title: "1 title mod",
+  });
+  Assert.equal(root.getChild(0).title, "1 title mod");
+  Assert.equal(root.getChild(0).bookmarkGuid, bookmarkGuidZero);
+  Assert.equal(root.getChild(0).pageGuid, pageGuidZero);
+
+  let bookmarkGuidOne = root.getChild(1).bookmarkGuid;
+  let pageGuidOne = root.getChild(1).pageGuid;
+
+  await PlacesUtils.bookmarks.update({
+    guid: bookmarks[2].guid,
+    title: "test foolder 234",
+  });
+  Assert.equal(root.getChild(1).title, "test foolder 234");
+  Assert.equal(root.getChild(1).bookmarkGuid, bookmarkGuidOne);
+  Assert.equal(root.getChild(1).pageGuid, pageGuidOne);
+
+  root.containerOpen = false;
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_addVisitAndCheckGuid() {
+  // add a visit and test page guid and non-existing bookmark guids.
+  let sourceURI = uri("http://test4.com/");
+  await PlacesTestUtils.addVisits({ uri: sourceURI });
+  Assert.equal(await PlacesUtils.bookmarks.fetch({ url: sourceURI }, null));
+
+  let options = histsvc.getNewQueryOptions();
+  let query = histsvc.getNewQuery();
+  query.uri = sourceURI;
+  let root = histsvc.executeQuery(query, options).root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 1);
+
+  do_check_valid_places_guid(root.getChild(0).pageGuid);
+  Assert.equal(root.getChild(0).bookmarkGuid, "");
+  root.containerOpen = false;
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function test_addItemsWithInvalidGUIDsFails() {
+  const INVALID_GUID = "XYZ";
+  try {
+    await PlacesUtils.bookmarks.insert({
+      parentGuid: PlacesUtils.bookmarks.menuGuid,
+      guid: INVALID_GUID,
+      title: "XYZ folder",
+      type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    });
+    do_throw("Adding a folder with an invalid guid should fail");
+  } catch (ex) {}
+
+  let folder = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    title: "test folder",
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+  });
+  try {
+    PlacesUtils.bookmarks.insert({
+      parentGuid: folder.guid,
+      guid: INVALID_GUID,
+      title: "title",
+      url: "http://test.tld",
+    });
+    do_throw("Adding a bookmark with an invalid guid should fail");
+  } catch (ex) {}
+
+  try {
+    PlacesUtils.bookmarks.insert({
+      parentGuid: folder.guid,
+      guid: INVALID_GUID,
+      type: PlacesUtils.bookmarks.TYPE_SEPARATOR,
+    });
+    do_throw("Adding a separator with an invalid guid should fail");
+  } catch (ex) {}
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_addItemsWithGUIDs() {
+  const FOLDER_GUID = "FOLDER--GUID";
+  const BOOKMARK_GUID = "BM------GUID";
+  const SEPARATOR_GUID = "SEP-----GUID";
+
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.menuGuid,
+    children: [
+      {
+        title: "test folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        guid: FOLDER_GUID,
+        children: [
+          {
+            url: "http://test1.com",
+            title: "1 title",
+            guid: BOOKMARK_GUID,
+          },
+          {
+            type: PlacesUtils.bookmarks.TYPE_SEPARATOR,
+            guid: SEPARATOR_GUID,
+          },
+        ],
+      },
+    ],
+  });
+
+  let root = PlacesUtils.getFolderContents(bookmarks[0].guid).root;
+  Assert.equal(root.childCount, 2);
+  Assert.equal(root.bookmarkGuid, FOLDER_GUID);
+  Assert.equal(root.getChild(0).bookmarkGuid, BOOKMARK_GUID);
+  Assert.equal(root.getChild(1).bookmarkGuid, SEPARATOR_GUID);
+
+  root.containerOpen = false;
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_emptyGUIDFails() {
+  try {
+    await PlacesUtils.bookmarks.insert({
+      parentGuid: PlacesUtils.bookmarks.menuGuid,
+      guid: "",
+      title: "test folder",
+      type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    });
+    do_throw("Adding a folder with an empty guid should fail");
+  } catch (ex) {}
+});
+
+add_task(async function test_usingSameGUIDFails() {
+  const GUID = "XYZXYZXYZXYZ";
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    guid: GUID,
+    title: "test folder",
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+  });
+  try {
+    await PlacesUtils.bookmarks.insert({
+      parentGuid: PlacesUtils.bookmarks.menuGuid,
+      guid: GUID,
+      title: "test folder 2",
+      type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    });
+    do_throw("Using the same guid twice should fail");
+  } catch (ex) {}
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
diff --git a/toolkit/components/places/tests/unit/test_placeURIs.js b/toolkit/components/places/tests/unit/test_placeURIs.js
new file mode 100644
index 0000000000..093dc89f68
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_placeURIs.js
@@ -0,0 +1,18 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function run_test() {
+  // TODO: Improve testing coverage for QueryToQueryString and QueryStringToQuery
+
+  // Bug 376798
+  let query = PlacesUtils.history.getNewQuery();
+  let options = PlacesUtils.history.getNewQueryOptions();
+  query.setParents([PlacesUtils.bookmarks.rootGuid]);
+  Assert.equal(
+    PlacesUtils.history.queryToQueryString(query, options),
+    `place:parent=${PlacesUtils.bookmarks.rootGuid}`
+  );
+}
diff --git a/toolkit/components/places/tests/unit/test_promiseBookmarksTree.js b/toolkit/components/places/tests/unit/test_promiseBookmarksTree.js
new file mode 100644
index 0000000000..e42bf3b2d8
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_promiseBookmarksTree.js
@@ -0,0 +1,282 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+async function check_has_child(aParentGuid, aChildGuid) {
+  let parentTree = await PlacesUtils.promiseBookmarksTree(aParentGuid);
+  Assert.ok("children" in parentTree);
+  Assert.notEqual(
+    parentTree.children.find(e => e.guid == aChildGuid),
+    null
+  );
+}
+
+async function compareToNode(aItem, aNode, aIsRootItem, aExcludedGuids = []) {
+  // itemId==-1 indicates a non-bookmark node, which is unexpected.
+  Assert.notEqual(aNode.itemId, -1);
+
+  function check_unset(...aProps) {
+    for (let p of aProps) {
+      if (p in aItem) {
+        Assert.ok(false, `Unexpected property ${p} with value ${aItem[p]}`);
+      }
+    }
+  }
+
+  function compare_prop(aItemProp, aNodeProp = aItemProp, aOptional = false) {
+    if (aOptional && aNode[aNodeProp] === null) {
+      check_unset(aItemProp);
+    } else {
+      Assert.strictEqual(aItem[aItemProp], aNode[aNodeProp]);
+    }
+  }
+
+  // Bug 1013053 - bookmarkIndex is unavailable for the query's root
+  if (aNode.bookmarkIndex == -1) {
+    let bookmark = await PlacesUtils.bookmarks.fetch(aNode.bookmarkGuid);
+    Assert.strictEqual(aItem.index, bookmark.index);
+  } else {
+    compare_prop("index", "bookmarkIndex");
+  }
+
+  compare_prop("dateAdded");
+  compare_prop("lastModified");
+
+  if (aIsRootItem && aNode.bookmarkGuid != PlacesUtils.bookmarks.rootGuid) {
+    Assert.ok("parentGuid" in aItem);
+    await check_has_child(aItem.parentGuid, aItem.guid);
+  } else {
+    check_unset("parentGuid");
+  }
+
+  const BOOKMARK_ONLY_PROPS = ["uri", "iconUri", "tags", "charset", "keyword"];
+  const FOLDER_ONLY_PROPS = ["children", "root"];
+
+  let nodesCount = 1;
+
+  switch (aNode.type) {
+    case Ci.nsINavHistoryResultNode.RESULT_TYPE_FOLDER:
+      Assert.equal(aItem.type, PlacesUtils.TYPE_X_MOZ_PLACE_CONTAINER);
+      Assert.equal(aItem.typeCode, PlacesUtils.bookmarks.TYPE_FOLDER);
+      compare_prop("title", "title", true);
+      check_unset(...BOOKMARK_ONLY_PROPS);
+
+      let expectedChildrenNodes = [];
+
+      PlacesUtils.asContainer(aNode);
+      if (!aNode.containerOpen) {
+        aNode.containerOpen = true;
+      }
+
+      for (let i = 0; i < aNode.childCount; i++) {
+        let childNode = aNode.getChild(i);
+        if (
+          childNode.itemId == PlacesUtils.tagsFolderId ||
+          aExcludedGuids.includes(childNode.bookmarkGuid)
+        ) {
+          continue;
+        }
+        expectedChildrenNodes.push(childNode);
+      }
+
+      if (expectedChildrenNodes.length) {
+        Assert.ok(Array.isArray(aItem.children));
+        Assert.equal(aItem.children.length, expectedChildrenNodes.length);
+        for (let i = 0; i < aItem.children.length; i++) {
+          nodesCount += await compareToNode(
+            aItem.children[i],
+            expectedChildrenNodes[i],
+            false,
+            aExcludedGuids
+          );
+        }
+      } else {
+        check_unset("children");
+      }
+
+      let rootName = mapItemGuidToInternalRootName(aItem.guid);
+      if (rootName) {
+        Assert.equal(aItem.root, rootName);
+      } else {
+        check_unset("root");
+      }
+      break;
+    case Ci.nsINavHistoryResultNode.RESULT_TYPE_SEPARATOR:
+      Assert.equal(aItem.type, PlacesUtils.TYPE_X_MOZ_PLACE_SEPARATOR);
+      Assert.equal(aItem.typeCode, PlacesUtils.bookmarks.TYPE_SEPARATOR);
+      check_unset(...BOOKMARK_ONLY_PROPS, ...FOLDER_ONLY_PROPS);
+      break;
+    default:
+      Assert.equal(aItem.type, PlacesUtils.TYPE_X_MOZ_PLACE);
+      Assert.equal(aItem.typeCode, PlacesUtils.bookmarks.TYPE_BOOKMARK);
+      compare_prop("uri");
+      // node.tags's format is "a, b" whilst promiseBoookmarksTree is "a,b"
+      if (aNode.tags === null) {
+        check_unset("tags");
+      } else {
+        Assert.equal(aItem.tags, aNode.tags.replace(/, /g, ","));
+      }
+
+      if (aNode.icon) {
+        try {
+          await compareFavicons(aNode.icon, aItem.iconUri);
+        } catch (ex) {
+          info(ex);
+          todo_check_true(false);
+        }
+      } else {
+        check_unset(aItem.iconUri);
+      }
+
+      check_unset(...FOLDER_ONLY_PROPS);
+
+      let pageInfo = await PlacesUtils.history.fetch(aNode.uri, {
+        includeAnnotations: true,
+      });
+      let expectedCharset = pageInfo.annotations.get(PlacesUtils.CHARSET_ANNO);
+      if (expectedCharset) {
+        Assert.equal(aItem.charset, expectedCharset);
+      } else {
+        check_unset("charset");
+      }
+
+      let entry = await PlacesUtils.keywords.fetch({ url: aNode.uri });
+      if (entry) {
+        Assert.equal(aItem.keyword, entry.keyword);
+      } else {
+        check_unset("keyword");
+      }
+
+      if ("title" in aItem) {
+        compare_prop("title");
+      } else {
+        Assert.equal(null, aNode.title);
+      }
+  }
+
+  if (aIsRootItem) {
+    Assert.strictEqual(aItem.itemsCount, nodesCount);
+  }
+
+  return nodesCount;
+}
+
+var itemsCount = 0;
+async function new_bookmark(aInfo) {
+  ++itemsCount;
+  if (!("url" in aInfo)) {
+    aInfo.url = uri("http://test.item.y" + itemsCount);
+  }
+
+  if (!("title" in aInfo)) {
+    aInfo.title = "Test Item (bookmark) " + itemsCount;
+  }
+
+  await PlacesTransactions.NewBookmark(aInfo).transact();
+}
+
+function new_folder(aInfo) {
+  if (!("title" in aInfo)) {
+    aInfo.title = "Test Item (folder) " + itemsCount;
+  }
+  return PlacesTransactions.NewFolder(aInfo).transact();
+}
+
+// Walks a result nodes tree and test promiseBookmarksTree for each node.
+// DO NOT COPY THIS LOGIC:  It is done here to accomplish a more comprehensive
+// test of the API (the entire hierarchy data is available in the very test).
+async function test_promiseBookmarksTreeForEachNode(
+  aNode,
+  aOptions,
+  aExcludedGuids
+) {
+  Assert.ok(aNode.bookmarkGuid && !!aNode.bookmarkGuid.length);
+  let item = await PlacesUtils.promiseBookmarksTree(
+    aNode.bookmarkGuid,
+    aOptions
+  );
+  await compareToNode(item, aNode, true, aExcludedGuids);
+
+  if (!PlacesUtils.nodeIsContainer(aNode)) {
+    return item;
+  }
+
+  for (let i = 0; i < aNode.childCount; i++) {
+    let child = aNode.getChild(i);
+    if (child.itemId != PlacesUtils.tagsFolderId) {
+      await test_promiseBookmarksTreeForEachNode(
+        child,
+        { includeItemIds: true },
+        aExcludedGuids
+      );
+    }
+  }
+  return item;
+}
+
+async function test_promiseBookmarksTreeAgainstResult(
+  aItemGuid = PlacesUtils.bookmarks.rootGuid,
+  aOptions = { includeItemIds: true },
+  aExcludedGuids
+) {
+  let node = PlacesUtils.getFolderContents(aItemGuid).root;
+  return test_promiseBookmarksTreeForEachNode(node, aOptions, aExcludedGuids);
+}
+
+add_task(async function () {
+  // Add some bookmarks to cover various use cases.
+  await new_bookmark({ parentGuid: PlacesUtils.bookmarks.toolbarGuid });
+  await new_folder({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    annotations: [
+      { name: "TestAnnoA", value: "TestVal" },
+      { name: "TestAnnoB", value: 0 },
+    ],
+  });
+  let sepInfo = { parentGuid: PlacesUtils.bookmarks.menuGuid };
+  await PlacesTransactions.NewSeparator(sepInfo).transact();
+  let folderGuid = await new_folder({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+  });
+  await new_bookmark({
+    title: null,
+    parentGuid: folderGuid,
+    keyword: "test_keyword",
+    tags: ["TestTagA", "TestTagB"],
+    annotations: [{ name: "TestAnnoA", value: "TestVal2" }],
+  });
+  let urlWithCharsetAndFavicon = uri("http://charset.and.favicon");
+  await new_bookmark({ parentGuid: folderGuid, url: urlWithCharsetAndFavicon });
+  await PlacesUtils.history.update({
+    url: urlWithCharsetAndFavicon,
+    annotations: new Map([[PlacesUtils.CHARSET_ANNO, "UTF-16"]]),
+  });
+  await setFaviconForPage(urlWithCharsetAndFavicon, SMALLPNG_DATA_URI);
+  // Test the default places root without specifying it.
+  await test_promiseBookmarksTreeAgainstResult();
+
+  // Do specify it
+  await test_promiseBookmarksTreeAgainstResult(PlacesUtils.bookmarks.rootGuid);
+
+  // Exclude the bookmarks menu.
+  // The calllback should be four times - once for the toolbar, once for
+  // the bookmark we inserted under, and once for the menu (and not
+  // at all for any of its descendants) and once for the unsorted bookmarks
+  // folder.  However, promiseBookmarksTree is called multiple times, so
+  // rather than counting the calls, we count the number of unique items
+  // passed in.
+  let guidsPassedToExcludeCallback = new Set();
+  let placesRootWithoutTheMenu = await test_promiseBookmarksTreeAgainstResult(
+    PlacesUtils.bookmarks.rootGuid,
+    {
+      excludeItemsCallback: aItem => {
+        guidsPassedToExcludeCallback.add(aItem.guid);
+        return aItem.root == "bookmarksMenuFolder";
+      },
+      includeItemIds: true,
+    },
+    [PlacesUtils.bookmarks.menuGuid]
+  );
+  Assert.equal(guidsPassedToExcludeCallback.size, 5);
+  Assert.equal(placesRootWithoutTheMenu.children.length, 3);
+});
diff --git a/toolkit/components/places/tests/unit/test_resolveNullBookmarkTitles.js b/toolkit/components/places/tests/unit/test_resolveNullBookmarkTitles.js
new file mode 100644
index 0000000000..d8830c5686
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_resolveNullBookmarkTitles.js
@@ -0,0 +1,39 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+add_task(async function () {
+  let uri1 = uri("http://foo.tld/");
+  let uri2 = uri("https://bar.tld/");
+
+  await PlacesTestUtils.addVisits([
+    { uri: uri1, title: "foo title" },
+    { uri: uri2, title: "bar title" },
+  ]);
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: uri1,
+    title: null,
+  });
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: uri2,
+    title: null,
+  });
+
+  PlacesUtils.tagging.tagURI(uri1, ["tag 1"]);
+  PlacesUtils.tagging.tagURI(uri2, ["tag 2"]);
+});
+
+add_task(async function testTagQuery() {
+  let options = PlacesUtils.history.getNewQueryOptions();
+  let query = PlacesUtils.history.getNewQuery();
+  query.tags = ["tag 1"];
+  let root = PlacesUtils.history.executeQuery(query, options).root;
+  root.containerOpen = true;
+  Assert.equal(root.childCount, 1);
+  Assert.equal(root.getChild(0).title, "");
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_result_sort.js b/toolkit/components/places/tests/unit/test_result_sort.js
new file mode 100644
index 0000000000..840b40c339
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_result_sort.js
@@ -0,0 +1,112 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const NHQO = Ci.nsINavHistoryQueryOptions;
+
+add_task(async function test() {
+  const uri1 = "http://foo.tld/a";
+  const uri2 = "http://foo.tld/b";
+
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.menuGuid,
+    children: [
+      {
+        title: "Result-sort functionality tests root",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            title: "b",
+            url: uri1,
+          },
+          {
+            title: "a",
+            url: uri2,
+          },
+          {
+            // url of the first child, title of second
+            title: "a",
+            url: uri1,
+          },
+        ],
+      },
+    ],
+  });
+
+  let guid1 = bookmarks[1].guid;
+  let guid2 = bookmarks[2].guid;
+  let guid3 = bookmarks[3].guid;
+
+  // query with natural order
+  let result = PlacesUtils.getFolderContents(bookmarks[0].guid);
+  let root = result.root;
+
+  Assert.equal(root.childCount, 3);
+
+  function checkOrder(a, b, c) {
+    Assert.equal(root.getChild(0).bookmarkGuid, a);
+    Assert.equal(root.getChild(1).bookmarkGuid, b);
+    Assert.equal(root.getChild(2).bookmarkGuid, c);
+  }
+
+  // natural order
+  info("Natural order");
+  checkOrder(guid1, guid2, guid3);
+
+  // title: guid3 should precede guid2 since we fall-back to URI-based sorting
+  info("Sort by title asc");
+  result.sortingMode = NHQO.SORT_BY_TITLE_ASCENDING;
+  checkOrder(guid3, guid2, guid1);
+
+  // In reverse
+  info("Sort by title desc");
+  result.sortingMode = NHQO.SORT_BY_TITLE_DESCENDING;
+  checkOrder(guid1, guid2, guid3);
+
+  // uri sort: guid1 should precede guid3 since we fall-back to natural order
+  info("Sort by uri asc");
+  result.sortingMode = NHQO.SORT_BY_URI_ASCENDING;
+  checkOrder(guid1, guid3, guid2);
+
+  // test live update
+  info("Change bookmark uri liveupdate");
+  await PlacesUtils.bookmarks.update({
+    guid: guid1,
+    url: uri2,
+  });
+  checkOrder(guid3, guid1, guid2);
+  await PlacesUtils.bookmarks.update({
+    guid: guid1,
+    url: uri1,
+  });
+  checkOrder(guid1, guid3, guid2);
+
+  // XXXtodo: test history sortings (visit count, visit date)
+  // XXXtodo: test different item types once folderId and bookmarkId are merged.
+
+  // XXXtodo:  test dateAdded sort
+  // XXXtodo:  test lastModified sort
+
+  // Add a visit, then check frecency ordering.
+
+  await PlacesTestUtils.addVisits({ uri: uri2, transition: TRANSITION_TYPED });
+
+  info("Sort by frecency desc");
+  result.sortingMode = NHQO.SORT_BY_FRECENCY_DESCENDING;
+  for (let i = 0; i < root.childCount; ++i) {
+    print(root.getChild(i).uri + " " + root.getChild(i).title);
+  }
+  // For guid1 and guid3, since they have same frecency and no visits, fallback
+  // to sort by the newest bookmark.
+  checkOrder(guid2, guid3, guid1);
+  info("Sort by frecency asc");
+  result.sortingMode = NHQO.SORT_BY_FRECENCY_ASCENDING;
+  for (let i = 0; i < root.childCount; ++i) {
+    print(root.getChild(i).uri + " " + root.getChild(i).title);
+  }
+  checkOrder(guid1, guid3, guid2);
+
+  root.containerOpen = false;
+});
diff --git a/toolkit/components/places/tests/unit/test_resultsAsVisit_details.js b/toolkit/components/places/tests/unit/test_resultsAsVisit_details.js
new file mode 100644
index 0000000000..29963ad269
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_resultsAsVisit_details.js
@@ -0,0 +1,100 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+
+const { history } = PlacesUtils;
+
+add_task(async function test_addVisitCheckFields() {
+  let uri = NetUtil.newURI("http://test4.com/");
+  await PlacesTestUtils.addVisits([
+    { uri },
+    { uri, referrer: uri },
+    { uri, transition: history.TRANSITION_TYPED },
+  ]);
+
+  let options = history.getNewQueryOptions();
+  let query = history.getNewQuery();
+
+  query.uri = uri;
+
+  // Check RESULTS_AS_VISIT node.
+  options.resultType = options.RESULTS_AS_VISIT;
+
+  let root = history.executeQuery(query, options).root;
+  root.containerOpen = true;
+
+  equal(root.childCount, 3);
+
+  let child = root.getChild(0);
+  equal(
+    child.visitType,
+    history.TRANSITION_LINK,
+    "Visit type should be TRANSITION_LINK"
+  );
+  equal(child.visitId, 1, "Visit ID should be 1");
+
+  child = root.getChild(1);
+  equal(
+    child.visitType,
+    history.TRANSITION_LINK,
+    "Visit type should be TRANSITION_LINK"
+  );
+  equal(child.visitId, 2, "Visit ID should be 2");
+
+  child = root.getChild(2);
+  equal(
+    child.visitType,
+    history.TRANSITION_TYPED,
+    "Visit type should be TRANSITION_TYPED"
+  );
+  equal(child.visitId, 3, "Visit ID should be 3");
+
+  root.containerOpen = false;
+
+  // Check RESULTS_AS_URI node.
+  options.resultType = options.RESULTS_AS_URI;
+
+  root = history.executeQuery(query, options).root;
+  root.containerOpen = true;
+
+  equal(root.childCount, 1);
+
+  child = root.getChild(0);
+  equal(child.visitType, 0, "Visit type should be 0");
+  equal(child.visitId, -1, "Visit ID should be -1");
+
+  root.containerOpen = false;
+
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function test_bookmarkFields() {
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.unfiledGuid,
+    children: [
+      {
+        title: "test folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            title: "test title",
+            url: "http://test4.com",
+          },
+        ],
+      },
+    ],
+  });
+
+  let root = PlacesUtils.getFolderContents(bookmarks[0].guid).root;
+  equal(root.childCount, 1);
+
+  equal(root.visitType, 0, "Visit type should be 0");
+  equal(root.visitId, -1, "Visit ID should be -1");
+
+  let child = root.getChild(0);
+  equal(child.visitType, 0, "Visit type should be 0");
+  equal(child.visitId, -1, "Visit ID should be -1");
+
+  root.containerOpen = false;
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
diff --git a/toolkit/components/places/tests/unit/test_sql_function_origin.js b/toolkit/components/places/tests/unit/test_sql_function_origin.js
new file mode 100644
index 0000000000..0314ff5040
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_sql_function_origin.js
@@ -0,0 +1,79 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests the origin-related SQL functions, which are:
+// * get_host_and_port
+// * get_prefix
+// * strip_prefix_and_userinfo
+
+// Tests actual URL strings.
+add_task(async function urls() {
+  let sets = [
+    ["http:"],
+    ["", "//"],
+    ["", "user@", "user:@", "user:pass@", "user:pass:word@"],
+    ["example.com"],
+    ["", ":8888"],
+    ["", "/", "/foo"],
+    ["", "?", "?bar"],
+    ["", "#", "#baz"],
+  ];
+  let db = await PlacesUtils.promiseDBConnection();
+  for (let parts of permute(sets)) {
+    let spec = parts.join("");
+    let funcs = {
+      get_prefix: parts.slice(0, 2).join(""),
+      get_host_and_port: parts.slice(3, 5).join(""),
+      strip_prefix_and_userinfo: parts.slice(3).join(""),
+    };
+    for (let [func, expectedValue] of Object.entries(funcs)) {
+      let rows = await db.execute(`
+        SELECT ${func}("${spec}");
+      `);
+      let value = rows[0].getString(0);
+      Assert.equal(value, expectedValue, `function=${func} spec="${spec}"`);
+    }
+  }
+});
+
+// Tests strings that aren't URLs.
+add_task(async function nonURLs() {
+  let db = await PlacesUtils.promiseDBConnection();
+
+  let value = (
+    await db.execute(`
+    SELECT get_prefix("hello");
+  `)
+  )[0].getString(0);
+  Assert.equal(value, "");
+
+  value = (
+    await db.execute(`
+    SELECT get_host_and_port("hello");
+  `)
+  )[0].getString(0);
+  Assert.equal(value, "hello");
+
+  value = (
+    await db.execute(`
+    SELECT strip_prefix_and_userinfo("hello");
+  `)
+  )[0].getString(0);
+  Assert.equal(value, "hello");
+});
+
+function permute(sets = []) {
+  if (!sets.length) {
+    return [[]];
+  }
+  let firstSet = sets[0];
+  let otherSets = sets.slice(1);
+  let permutedSequences = [];
+  let otherPermutedSequences = permute(otherSets);
+  for (let other of otherPermutedSequences) {
+    for (let value of firstSet) {
+      permutedSequences.push([value].concat(other));
+    }
+  }
+  return permutedSequences;
+}
diff --git a/toolkit/components/places/tests/unit/test_sql_guid_functions.js b/toolkit/components/places/tests/unit/test_sql_guid_functions.js
new file mode 100644
index 0000000000..b4fbdac612
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_sql_guid_functions.js
@@ -0,0 +1,94 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * This file tests that the guid function generates a guid of the proper length,
+ * with no invalid characters.
+ */
+
+/**
+ * Checks all our invariants about our guids for a given result.
+ *
+ * @param aGuid
+ *        The guid to check.
+ */
+function check_invariants(aGuid) {
+  info("Checking guid '" + aGuid + "'");
+
+  do_check_valid_places_guid(aGuid);
+}
+
+// Test Functions
+
+function test_guid_invariants() {
+  const kExpectedChars = 64;
+  const kAllowedChars =
+    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_";
+  Assert.equal(kAllowedChars.length, kExpectedChars);
+  const kGuidLength = 12;
+
+  let checkedChars = [];
+  for (let i = 0; i < kGuidLength; i++) {
+    checkedChars[i] = {};
+    for (let j = 0; j < kAllowedChars; j++) {
+      checkedChars[i][kAllowedChars[j]] = false;
+    }
+  }
+
+  // We run this until we've seen every character that we expect to see in every
+  // position.
+  let seenChars = 0;
+  let stmt = DBConn().createStatement("SELECT GENERATE_GUID()");
+  while (seenChars != kExpectedChars * kGuidLength) {
+    Assert.ok(stmt.executeStep());
+    let guid = stmt.getString(0);
+    check_invariants(guid);
+
+    for (let i = 0; i < guid.length; i++) {
+      let character = guid[i];
+      if (!checkedChars[i][character]) {
+        checkedChars[i][character] = true;
+        seenChars++;
+      }
+    }
+    stmt.reset();
+  }
+  stmt.finalize();
+
+  // One last reality check - make sure all of our characters were seen.
+  for (let i = 0; i < kGuidLength; i++) {
+    for (let j = 0; j < kAllowedChars; j++) {
+      Assert.ok(checkedChars[i][kAllowedChars[j]]);
+    }
+  }
+
+  run_next_test();
+}
+
+function test_guid_on_background() {
+  // We should not assert if we execute this asynchronously.
+  let stmt = DBConn().createAsyncStatement("SELECT GENERATE_GUID()");
+  let checked = false;
+  stmt.executeAsync({
+    handleResult(aResult) {
+      try {
+        let row = aResult.getNextRow();
+        check_invariants(row.getResultByIndex(0));
+        Assert.equal(aResult.getNextRow(), null);
+        checked = true;
+      } catch (e) {
+        do_throw(e);
+      }
+    },
+    handleCompletion(aReason) {
+      Assert.equal(aReason, Ci.mozIStorageStatementCallback.REASON_FINISHED);
+      Assert.ok(checked);
+      run_next_test();
+    },
+  });
+  stmt.finalize();
+}
+
+// Test Runner
+
+[test_guid_invariants, test_guid_on_background].forEach(fn => add_test(fn));
diff --git a/toolkit/components/places/tests/unit/test_tag_autocomplete_search.js b/toolkit/components/places/tests/unit/test_tag_autocomplete_search.js
new file mode 100644
index 0000000000..43f899c237
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_tag_autocomplete_search.js
@@ -0,0 +1,119 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function AutoCompleteInput(aSearches) {
+  this.searches = aSearches;
+}
+AutoCompleteInput.prototype = {
+  constructor: AutoCompleteInput,
+
+  searches: null,
+
+  minResultsForPopup: 0,
+  timeout: 10,
+  searchParam: "",
+  textValue: "",
+  disableAutoComplete: false,
+  completeDefaultIndex: false,
+
+  get searchCount() {
+    return this.searches.length;
+  },
+
+  getSearchAt(aIndex) {
+    return this.searches[aIndex];
+  },
+
+  onSearchBegin() {},
+  onSearchComplete() {},
+
+  popupOpen: false,
+
+  popup: {
+    setSelectedIndex(aIndex) {},
+    invalidate() {},
+
+    // nsISupports implementation
+    QueryInterface: ChromeUtils.generateQI(["nsIAutoCompletePopup"]),
+  },
+
+  // nsISupports implementation
+  QueryInterface: ChromeUtils.generateQI(["nsIAutoCompleteInput"]),
+};
+
+async function ensure_tag_results(results, searchTerm) {
+  var controller = Cc["@mozilla.org/autocomplete/controller;1"].getService(
+    Ci.nsIAutoCompleteController
+  );
+
+  // Make an AutoCompleteInput that uses our searches
+  // and confirms results on search complete
+  var input = new AutoCompleteInput(["places-tag-autocomplete"]);
+
+  controller.input = input;
+
+  return new Promise(resolve => {
+    var numSearchesStarted = 0;
+    input.onSearchBegin = function input_onSearchBegin() {
+      numSearchesStarted++;
+      Assert.equal(numSearchesStarted, 1);
+    };
+
+    input.onSearchComplete = function input_onSearchComplete() {
+      Assert.equal(numSearchesStarted, 1);
+      if (results.length) {
+        Assert.equal(
+          controller.searchStatus,
+          Ci.nsIAutoCompleteController.STATUS_COMPLETE_MATCH
+        );
+      } else {
+        Assert.equal(
+          controller.searchStatus,
+          Ci.nsIAutoCompleteController.STATUS_COMPLETE_NO_MATCH
+        );
+      }
+
+      Assert.equal(controller.matchCount, results.length);
+      for (var i = 0; i < controller.matchCount; i++) {
+        Assert.equal(controller.getValueAt(i), results[i]);
+      }
+
+      resolve();
+    };
+
+    controller.startSearch(searchTerm);
+  });
+}
+
+var uri1 = uri("http://site.tld/1");
+
+var tests = [
+  () => ensure_tag_results(["bar", "Baz", "boo"], "b"),
+  () => ensure_tag_results(["bar", "Baz"], "ba"),
+  () => ensure_tag_results(["bar", "Baz"], "Ba"),
+  () => ensure_tag_results(["bar"], "bar"),
+  () => ensure_tag_results(["Baz"], "Baz"),
+  () => ensure_tag_results([], "barb"),
+  () => ensure_tag_results([], "foo"),
+  () =>
+    ensure_tag_results(["first tag, bar", "first tag, Baz"], "first tag, ba"),
+  () =>
+    ensure_tag_results(
+      ["first tag;  bar", "first tag;  Baz"],
+      "first tag;  ba"
+    ),
+];
+
+/**
+ * Test tag autocomplete
+ */
+add_task(async function test_tag_autocomplete() {
+  PlacesUtils.tagging.tagURI(uri1, ["bar", "Baz", "boo", "*nix"]);
+
+  for (let tagTest of tests) {
+    await tagTest();
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_tagging.js b/toolkit/components/places/tests/unit/test_tagging.js
new file mode 100644
index 0000000000..f38db0d0f6
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_tagging.js
@@ -0,0 +1,188 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Notice we use createInstance because later we will have to terminate the
+// service and restart it.
+var tagssvc = Cc["@mozilla.org/browser/tagging-service;1"]
+  .createInstance()
+  .QueryInterface(Ci.nsITaggingService);
+
+function run_test() {
+  var options = PlacesUtils.history.getNewQueryOptions();
+  var query = PlacesUtils.history.getNewQuery();
+
+  query.setParents([PlacesUtils.bookmarks.tagsGuid]);
+  var result = PlacesUtils.history.executeQuery(query, options);
+  var tagRoot = result.root;
+  tagRoot.containerOpen = true;
+
+  Assert.equal(tagRoot.childCount, 0);
+
+  var uri1 = uri("http://foo.tld/");
+  var uri2 = uri("https://bar.tld/");
+
+  // this also tests that the multiple folders are not created for the same tag
+  tagssvc.tagURI(uri1, ["tag 1"]);
+  tagssvc.tagURI(uri2, ["tag 1"]);
+  Assert.equal(tagRoot.childCount, 1);
+
+  var tag1node = tagRoot
+    .getChild(0)
+    .QueryInterface(Ci.nsINavHistoryContainerResultNode);
+  var tag1itemId = tag1node.itemId;
+
+  Assert.equal(tag1node.title, "tag 1");
+  tag1node.containerOpen = true;
+  Assert.equal(tag1node.childCount, 2);
+
+  // Tagging the same url twice (or even thrice!) with the same tag should be a
+  // no-op
+  tagssvc.tagURI(uri1, ["tag 1"]);
+  Assert.equal(tag1node.childCount, 2);
+  tagssvc.tagURI(uri1, [tag1itemId]);
+  Assert.equal(tag1node.childCount, 2);
+  Assert.equal(tagRoot.childCount, 1);
+
+  // also tests bug 407575
+  tagssvc.tagURI(uri1, [tag1itemId, "tag 1", "tag 2", "Tag 1", "Tag 2"]);
+  Assert.equal(tagRoot.childCount, 2);
+  Assert.equal(tag1node.childCount, 2);
+
+  // test getTagsForURI
+  var uri1tags = tagssvc.getTagsForURI(uri1);
+  Assert.equal(uri1tags.length, 2);
+  Assert.equal(uri1tags[0], "Tag 1");
+  Assert.equal(uri1tags[1], "Tag 2");
+  var uri2tags = tagssvc.getTagsForURI(uri2);
+  Assert.equal(uri2tags.length, 1);
+  Assert.equal(uri2tags[0], "Tag 1");
+
+  // test untagging
+  tagssvc.untagURI(uri1, ["tag 1"]);
+  Assert.equal(tag1node.childCount, 1);
+
+  let wait = PlacesTestUtils.waitForNotification("bookmark-removed", events =>
+    events.some(event => event.id == tagRoot.itemId)
+  );
+  // removing the last uri from a tag should remove the tag-container
+  tagssvc.untagURI(uri2, ["tag 1"]);
+  wait.then(() => {
+    Assert.equal(tagRoot.childCount, 1);
+  });
+
+  // cleanup
+  tag1node.containerOpen = false;
+
+  // get array of tag folder ids => title
+  // for testing tagging with mixed folder ids and tags
+  var child = tagRoot.getChild(0);
+  var tagId = child.itemId;
+  var tagTitle = child.title;
+
+  // test mixed id/name tagging
+  // as well as non-id numeric tags
+  var uri3 = uri("http://testuri/3");
+  tagssvc.tagURI(uri3, [tagId, "tag 3", "456"]);
+  var tags = tagssvc.getTagsForURI(uri3);
+  Assert.ok(tags.includes(tagTitle));
+  Assert.ok(tags.includes("tag 3"));
+  Assert.ok(tags.includes("456"));
+
+  // test mixed id/name tagging
+  tagssvc.untagURI(uri3, [tagId, "tag 3", "456"]);
+  tags = tagssvc.getTagsForURI(uri3);
+  Assert.equal(tags.length, 0);
+
+  // Terminate tagging service, fire up a new instance and check that existing
+  // tags are there.  This will ensure that any internal caching system is
+  // correctly filled at startup and we are not losing previously existing tags.
+  var uri4 = uri("http://testuri/4");
+  tagssvc.tagURI(uri4, [tagId, "tag 3", "456"]);
+  tagssvc = null;
+  tagssvc = Cc["@mozilla.org/browser/tagging-service;1"].getService(
+    Ci.nsITaggingService
+  );
+  var uri4Tags = tagssvc.getTagsForURI(uri4);
+  Assert.equal(uri4Tags.length, 3);
+  Assert.ok(uri4Tags.includes(tagTitle));
+  Assert.ok(uri4Tags.includes("tag 3"));
+  Assert.ok(uri4Tags.includes("456"));
+
+  // Test sparse arrays.
+  let curChildCount = tagRoot.childCount;
+
+  try {
+    tagssvc.tagURI(uri1, [undefined, "tagSparse"]);
+    Assert.equal(tagRoot.childCount, curChildCount + 1);
+  } catch (ex) {
+    do_throw("Passing a sparse array should not throw");
+  }
+  try {
+    wait = PlacesTestUtils.waitForNotification("bookmark-removed", events =>
+      events.some(event => event.id == tagRoot.itemId)
+    );
+    tagssvc.untagURI(uri1, [undefined, "tagSparse"]);
+    wait.then(() => {
+      Assert.equal(tagRoot.childCount, curChildCount);
+    });
+  } catch (ex) {
+    do_throw("Passing a sparse array should not throw");
+  }
+
+  // Test that the API throws for bad arguments.
+  try {
+    tagssvc.tagURI(uri1, ["", "test"]);
+    do_throw("Passing a bad tags array should throw");
+  } catch (ex) {
+    Assert.equal(ex.name, "NS_ERROR_ILLEGAL_VALUE");
+  }
+  try {
+    tagssvc.untagURI(uri1, ["", "test"]);
+    do_throw("Passing a bad tags array should throw");
+  } catch (ex) {
+    Assert.equal(ex.name, "NS_ERROR_ILLEGAL_VALUE");
+  }
+  try {
+    tagssvc.tagURI(uri1, [0, "test"]);
+    do_throw("Passing a bad tags array should throw");
+  } catch (ex) {
+    Assert.equal(ex.name, "NS_ERROR_ILLEGAL_VALUE");
+  }
+  try {
+    tagssvc.tagURI(uri1, [0, "test"]);
+    do_throw("Passing a bad tags array should throw");
+  } catch (ex) {
+    Assert.equal(ex.name, "NS_ERROR_ILLEGAL_VALUE");
+  }
+
+  // Tag name length should be limited to PlacesUtils.bookmarks.MAX_TAG_LENGTH (bug407821)
+  try {
+    // generate a long tag name. i.e. looooo...oong_tag
+    var n = PlacesUtils.bookmarks.MAX_TAG_LENGTH;
+    var someOos = new Array(n).join("o");
+    var longTagName = "l" + someOos + "ng_tag";
+
+    tagssvc.tagURI(uri1, ["short_tag", longTagName]);
+    do_throw("Passing a bad tags array should throw");
+  } catch (ex) {
+    Assert.equal(ex.name, "NS_ERROR_ILLEGAL_VALUE");
+  }
+
+  // cleanup
+  tagRoot.containerOpen = false;
+
+  // Tagging service should trim tags (Bug967196)
+  let exampleURI = uri("http://www.example.com/");
+  PlacesUtils.tagging.tagURI(exampleURI, [" test "]);
+
+  let exampleTags = PlacesUtils.tagging.getTagsForURI(exampleURI);
+  Assert.equal(exampleTags.length, 1);
+  Assert.equal(exampleTags[0], "test");
+
+  PlacesUtils.tagging.untagURI(exampleURI, ["test"]);
+  exampleTags = PlacesUtils.tagging.getTagsForURI(exampleURI);
+  Assert.equal(exampleTags.length, 0);
+}
diff --git a/toolkit/components/places/tests/unit/test_telemetry.js b/toolkit/components/places/tests/unit/test_telemetry.js
new file mode 100644
index 0000000000..b48bb76a7f
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_telemetry.js
@@ -0,0 +1,151 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests common Places telemetry probes by faking the telemetry service.
+
+// Enable the collection (during test) for all products so even products
+// that don't collect the data will be able to run the test without failure.
+Services.prefs.setBoolPref(
+  "toolkit.telemetry.testing.overrideProductsCheck",
+  true
+);
+
+const { PlacesDBUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/PlacesDBUtils.sys.mjs"
+);
+
+const histograms = {
+  PLACES_PAGES_COUNT: val => Assert.equal(val, 1),
+  PLACES_BOOKMARKS_COUNT: val => Assert.equal(val, 1),
+  PLACES_TAGS_COUNT: val => Assert.equal(val, 1),
+  PLACES_KEYWORDS_COUNT: val => Assert.equal(val, 1),
+  PLACES_SORTED_BOOKMARKS_PERC: val => Assert.equal(val, 100),
+  PLACES_TAGGED_BOOKMARKS_PERC: val => Assert.equal(val, 100),
+  PLACES_DATABASE_FILESIZE_MB: val => Assert.ok(val > 0),
+  PLACES_DATABASE_FAVICONS_FILESIZE_MB: val => Assert.ok(val > 0),
+  PLACES_EXPIRATION_STEPS_TO_CLEAN2: val => Assert.ok(val > 1),
+  PLACES_IDLE_MAINTENANCE_TIME_MS: val => Assert.ok(val > 0),
+  PLACES_ANNOS_PAGES_COUNT: val => Assert.equal(val, 1),
+  PLACES_MAINTENANCE_DAYSFROMLAST: val => Assert.ok(val >= 0),
+};
+
+const scalars = {
+  pages_need_frecency_recalculation: 1, // 1 bookmark is added causing recalc.
+};
+
+/**
+ * Forces an expiration run.
+ *
+ * @param [optional] aLimit
+ *        Limit for the expiration.  Pass -1 for unlimited.
+ *        Any other non-positive value will just expire orphans.
+ *
+ * @return {Promise}
+ * @resolves When expiration finishes.
+ * @rejects Never.
+ */
+function promiseForceExpirationStep(aLimit) {
+  let promise = promiseTopicObserved(PlacesUtils.TOPIC_EXPIRATION_FINISHED);
+  let expire = Cc["@mozilla.org/places/expiration;1"].getService(
+    Ci.nsIObserver
+  );
+  expire.observe(null, "places-debug-start-expiration", aLimit);
+  return promise;
+}
+
+/**
+ * Returns a PRTime in the past usable to add expirable visits.
+ *
+ * param [optional] daysAgo
+ *       Expiration ignores any visit added in the last 7 days, so by default
+ *       this will be set to 7.
+ * @note to be safe against DST issues we go back one day more.
+ */
+function getExpirablePRTime(daysAgo = 7) {
+  let dateObj = new Date();
+  // Normalize to midnight
+  dateObj.setHours(0);
+  dateObj.setMinutes(0);
+  dateObj.setSeconds(0);
+  dateObj.setMilliseconds(0);
+  dateObj = new Date(dateObj.getTime() - (daysAgo + 1) * 86400000);
+  return dateObj.getTime() * 1000;
+}
+
+add_task(async function test_execute() {
+  // Put some trash in the database.
+  let uri = Services.io.newURI("http://moz.org/");
+
+  PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.unfiledGuid,
+    children: [
+      {
+        title: "moz test",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            title: "moz test",
+            url: uri,
+          },
+        ],
+      },
+    ],
+  });
+
+  PlacesUtils.tagging.tagURI(uri, ["tag"]);
+  await PlacesUtils.keywords.insert({ url: uri.spec, keyword: "keyword" });
+
+  // Set a large annotation.
+  let content = "";
+  while (content.length < 1024) {
+    content += "0";
+  }
+
+  await PlacesUtils.history.update({
+    url: uri,
+    annotations: new Map([["test-anno", content]]),
+  });
+
+  await PlacesDBUtils.telemetry();
+
+  await PlacesTestUtils.promiseAsyncUpdates();
+
+  // Test expiration probes.
+  let timeInMicroseconds = getExpirablePRTime(8);
+
+  function newTimeInMicroseconds() {
+    timeInMicroseconds = timeInMicroseconds + 1000;
+    return timeInMicroseconds;
+  }
+
+  for (let i = 0; i < 3; i++) {
+    await PlacesTestUtils.addVisits({
+      uri: NetUtil.newURI("http://" + i + ".moz.org/"),
+      visitDate: newTimeInMicroseconds(),
+    });
+  }
+  Services.prefs.setIntPref("places.history.expiration.max_pages", 0);
+  await promiseForceExpirationStep(2);
+  await promiseForceExpirationStep(2);
+
+  // Test idle probes.
+  await PlacesDBUtils.maintenanceOnIdle();
+
+  for (let histogramId in histograms) {
+    info("checking histogram " + histogramId);
+    let validate = histograms[histogramId];
+    let snapshot = Services.telemetry.getHistogramById(histogramId).snapshot();
+    validate(snapshot.sum);
+    Assert.ok(Object.values(snapshot.values).reduce((a, b) => a + b, 0) > 0);
+  }
+  for (let scalarName in scalars) {
+    let scalar = "places." + scalarName;
+    info("checking scalar " + scalar);
+    TelemetryTestUtils.assertScalar(
+      TelemetryTestUtils.getProcessScalars("parent"),
+      scalar,
+      scalars[scalarName],
+      "Verify scalar value matches"
+    );
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_update_frecency_after_delete.js b/toolkit/components/places/tests/unit/test_update_frecency_after_delete.js
new file mode 100644
index 0000000000..fa03c0e06b
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_update_frecency_after_delete.js
@@ -0,0 +1,211 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Bug 455315
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=412132
+ *
+ * Ensures that the frecency of a bookmark's URI is what it should be after the
+ * bookmark is deleted.
+ */
+
+add_task(async function removed_bookmark() {
+  info(
+    "After removing bookmark, frecency of bookmark's URI should be " +
+      "zero if URI is unvisited and no longer bookmarked."
+  );
+  const TEST_URI = Services.io.newURI("http://example.com/1");
+  let bm = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark title",
+    url: TEST_URI,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("Bookmarked => frecency of URI should be != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.remove(bm);
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("Unvisited URI no longer bookmarked => frecency should = 0");
+  Assert.equal(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function removed_but_visited_bookmark() {
+  info(
+    "After removing bookmark, frecency of bookmark's URI should " +
+      "not be zero if URI is visited."
+  );
+  const TEST_URI = Services.io.newURI("http://example.com/1");
+  let bm = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark title",
+    url: TEST_URI,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("Bookmarked => frecency of URI should be != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesTestUtils.addVisits(TEST_URI);
+  await PlacesUtils.bookmarks.remove(bm);
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("*Visited* URI no longer bookmarked => frecency should != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function remove_bookmark_still_bookmarked() {
+  info(
+    "After removing bookmark, frecency of bookmark's URI should " +
+      "not be zero if URI is still bookmarked."
+  );
+  const TEST_URI = Services.io.newURI("http://example.com/1");
+  let bm1 = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark 1 title",
+    url: TEST_URI,
+  });
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark 2 title",
+    url: TEST_URI,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("Bookmarked => frecency of URI should be != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.remove(bm1);
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("URI still bookmarked => frecency should != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function cleared_parent_of_visited_bookmark() {
+  info(
+    "After removing all children from bookmark's parent, frecency " +
+      "of bookmark's URI should not be zero if URI is visited."
+  );
+  const TEST_URI = Services.io.newURI("http://example.com/1");
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    title: "bookmark title",
+    url: TEST_URI,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("Bookmarked => frecency of URI should be != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesTestUtils.addVisits(TEST_URI);
+  await PlacesUtils.bookmarks.eraseEverything();
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("*Visited* URI no longer bookmarked => frecency should != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function cleared_parent_of_bookmark_still_bookmarked() {
+  info(
+    "After removing all children from bookmark's parent, frecency " +
+      "of bookmark's URI should not be zero if URI is still " +
+      "bookmarked."
+  );
+  const TEST_URI = Services.io.newURI("http://example.com/1");
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "bookmark 1 title",
+    url: TEST_URI,
+  });
+
+  let folder = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    type: PlacesUtils.bookmarks.TYPE_FOLDER,
+    title: "bookmark 2 folder",
+  });
+  await PlacesUtils.bookmarks.insert({
+    title: "bookmark 2 title",
+    parentGuid: folder.guid,
+    url: TEST_URI,
+  });
+
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  info("Bookmarked => frecency of URI should be != 0");
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.remove(folder);
+  await PlacesFrecencyRecalculator.recalculateAnyOutdatedFrecencies();
+  // URI still bookmarked => frecency should != 0.
+  Assert.notEqual(
+    await PlacesTestUtils.getDatabaseValue("moz_places", "frecency", {
+      url: TEST_URI,
+    }),
+    0
+  );
+
+  await PlacesUtils.bookmarks.eraseEverything();
+  await PlacesUtils.history.clear();
+});
diff --git a/toolkit/components/places/tests/unit/test_utils_backups_create.js b/toolkit/components/places/tests/unit/test_utils_backups_create.js
new file mode 100644
index 0000000000..a0bc506695
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_utils_backups_create.js
@@ -0,0 +1,152 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Check for correct functionality of bookmarks backups
+ */
+
+const NUMBER_OF_BACKUPS = 10;
+
+async function createBackups(nBackups, dateObj, bookmarksBackupDir) {
+  // Generate random dates.
+  let dates = [];
+  while (dates.length < nBackups) {
+    // Use last year to ensure today's backup is the newest.
+    let randomDate = new Date(
+      dateObj.getFullYear() - 1,
+      Math.floor(12 * Math.random()),
+      Math.floor(28 * Math.random())
+    );
+    if (!dates.includes(randomDate.getTime())) {
+      dates.push(randomDate.getTime());
+    }
+  }
+  // Sort dates from oldest to newest.
+  dates.sort();
+
+  // Fake backups are created backwards to ensure we won't consider file
+  // creation time.
+  // Create fake backups for the newest dates.
+  for (let i = dates.length - 1; i >= 0; i--) {
+    let backupFilename = PlacesBackups.getFilenameForDate(new Date(dates[i]));
+    let backupFile = bookmarksBackupDir.clone();
+    backupFile.append(backupFilename);
+    backupFile.create(Ci.nsIFile.NORMAL_FILE_TYPE, parseInt("0666", 8));
+    info("Creating fake backup " + backupFile.leafName);
+    if (!backupFile.exists()) {
+      do_throw("Unable to create fake backup " + backupFile.leafName);
+    }
+  }
+
+  return dates;
+}
+
+async function checkBackups(dates, bookmarksBackupDir) {
+  // Check backups.  We have 11 dates but we the max number is 10 so the
+  // oldest backup should have been removed.
+  for (let i = 0; i < dates.length; i++) {
+    let backupFilename;
+    let shouldExist;
+    let backupFile;
+    if (i > 0) {
+      let files = bookmarksBackupDir.directoryEntries;
+      while (files.hasMoreElements()) {
+        let entry = files.nextFile;
+        if (PlacesBackups.filenamesRegex.test(entry.leafName)) {
+          backupFilename = entry.leafName;
+          backupFile = entry;
+          break;
+        }
+      }
+      shouldExist = true;
+    } else {
+      backupFilename = PlacesBackups.getFilenameForDate(new Date(dates[i]));
+      backupFile = bookmarksBackupDir.clone();
+      backupFile.append(backupFilename);
+      shouldExist = false;
+    }
+    if (backupFile.exists() != shouldExist) {
+      do_throw(
+        "Backup should " +
+          (shouldExist ? "" : "not") +
+          " exist: " +
+          backupFilename
+      );
+    }
+  }
+}
+
+async function cleanupFiles(bookmarksBackupDir) {
+  // Cleanup backups folder.
+  // XXX: Can't use bookmarksBackupDir.remove(true) because file lock happens
+  // on WIN XP.
+  let files = bookmarksBackupDir.directoryEntries;
+  while (files.hasMoreElements()) {
+    let entry = files.nextFile;
+    entry.remove(false);
+  }
+  // Clear cache to match the manual removing of files
+  delete PlacesBackups._backupFiles;
+  Assert.ok(!bookmarksBackupDir.directoryEntries.hasMoreElements());
+}
+
+add_task(async function test_create_backups() {
+  let backupFolderPath = await PlacesBackups.getBackupFolder();
+  let bookmarksBackupDir = new FileUtils.File(backupFolderPath);
+
+  let dateObj = new Date();
+  let dates = await createBackups(
+    NUMBER_OF_BACKUPS,
+    dateObj,
+    bookmarksBackupDir
+  );
+  // Add today's backup.
+  await PlacesBackups.create(NUMBER_OF_BACKUPS);
+  dates.push(dateObj.getTime());
+  await checkBackups(dates, bookmarksBackupDir);
+  await cleanupFiles(bookmarksBackupDir);
+});
+
+add_task(async function test_saveBookmarks_with_no_backups() {
+  let backupFolderPath = await PlacesBackups.getBackupFolder();
+  let bookmarksBackupDir = new FileUtils.File(backupFolderPath);
+
+  Services.prefs.setIntPref("browser.bookmarks.max_backups", 0);
+
+  let filePath = PathUtils.join(do_get_tempdir().path, "backup.json");
+  await PlacesBackups.saveBookmarksToJSONFile(filePath);
+  let files = bookmarksBackupDir.directoryEntries;
+  Assert.ok(!files.hasMoreElements(), "Should have no backup files.");
+  await IOUtils.remove(filePath);
+  // We don't need to call cleanupFiles as we are not creating any
+  // backups but need to reset the cache.
+  delete PlacesBackups._backupFiles;
+});
+
+add_task(async function test_saveBookmarks_with_backups() {
+  let backupFolderPath = await PlacesBackups.getBackupFolder();
+  let bookmarksBackupDir = new FileUtils.File(backupFolderPath);
+
+  Services.prefs.setIntPref("browser.bookmarks.max_backups", NUMBER_OF_BACKUPS);
+
+  let filePath = PathUtils.join(do_get_tempdir().path, "backup.json");
+  let dateObj = new Date();
+  let dates = await createBackups(
+    NUMBER_OF_BACKUPS,
+    dateObj,
+    bookmarksBackupDir
+  );
+
+  await PlacesBackups.saveBookmarksToJSONFile(filePath);
+
+  let backupPath = await PlacesBackups.getMostRecentBackup();
+  Assert.ok(await IOUtils.read(backupPath, { decompress: true }));
+
+  dates.push(dateObj.getTime());
+  await checkBackups(dates, bookmarksBackupDir);
+  await IOUtils.remove(filePath);
+  await cleanupFiles(bookmarksBackupDir);
+});
diff --git a/toolkit/components/places/tests/unit/test_utils_backups_hasRecent.js b/toolkit/components/places/tests/unit/test_utils_backups_hasRecent.js
new file mode 100644
index 0000000000..77d356b032
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_utils_backups_hasRecent.js
@@ -0,0 +1,43 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Check for correct functionality of bookmarks backups
+ */
+
+/**
+ * Creates a fake empty dated backup.
+ * @param {Date} date the Date to use for the backup file name
+ * @param {string} backupsFolderPath the path to the backups folder
+ * @returns path of the created backup file
+ */
+async function createFakeBackup(date, backupsFolderPath) {
+  let backupFilePath = PathUtils.join(
+    backupsFolderPath,
+    PlacesBackups.getFilenameForDate(date)
+  );
+  await IOUtils.write(backupFilePath, new Uint8Array());
+  return backupFilePath;
+}
+
+add_task(async function test_hasRecentBackup() {
+  let backupFolderPath = await PlacesBackups.getBackupFolder();
+  Assert.ok(!(await PlacesBackups.hasRecentBackup()), "Check no recent backup");
+
+  await createFakeBackup(new Date(Date.now() - 4 * 86400), backupFolderPath);
+  Assert.ok(!(await PlacesBackups.hasRecentBackup()), "Check no recent backup");
+  PlacesBackups.invalidateCache();
+  await createFakeBackup(new Date(Date.now() - 2 * 86400), backupFolderPath);
+  Assert.ok(await PlacesBackups.hasRecentBackup(), "Check has recent backup");
+  PlacesBackups.invalidateCache();
+
+  try {
+    await IOUtils.remove(backupFolderPath, { recursive: true });
+  } catch (ex) {
+    // On Windows the files may be locked.
+    info("Unable to cleanup the backups test folder");
+  }
+});
diff --git a/toolkit/components/places/tests/unit/test_utils_getURLsForContainerNode.js b/toolkit/components/places/tests/unit/test_utils_getURLsForContainerNode.js
new file mode 100644
index 0000000000..2d092ef591
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_utils_getURLsForContainerNode.js
@@ -0,0 +1,266 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Check for correct functionality of PlacesUtils.getURLsForContainerNode and
+ * PlacesUtils.hasChildURIs (those helpers share almost all of their code)
+ */
+
+var PU = PlacesUtils;
+var hs = PU.history;
+
+add_task(async function test_getURLsForContainerNode_folder() {
+  info("*** TEST: folder");
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.toolbarGuid,
+    children: [
+      {
+        // This is the folder we will check for children.
+        title: "folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        // Create a folder and a query node inside it, these should not be considered
+        // uri nodes.
+        children: [
+          {
+            title: "inside folder",
+            type: PlacesUtils.bookmarks.TYPE_FOLDER,
+            children: [
+              {
+                url: "place:sort=1",
+                title: "inside query",
+              },
+            ],
+          },
+        ],
+      },
+    ],
+  });
+
+  var query = hs.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.toolbarGuid]);
+  var options = hs.getNewQueryOptions();
+
+  info("Check folder without uri nodes");
+  check_uri_nodes(query, options, 0);
+
+  info("Check folder with uri nodes");
+  // Add an uri node, this should be considered.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: bookmarks[0].guid,
+    url: "http://www.mozilla.org/",
+    title: "bookmark",
+  });
+  check_uri_nodes(query, options, 1);
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_getURLsForContainerNode_folder_excludeItems() {
+  info("*** TEST: folder in an excludeItems root");
+  let bookmarks = await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.toolbarGuid,
+    children: [
+      {
+        // This is the folder we will check for children.
+        title: "folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        // Create a folder and a query node inside it, these should not be considered
+        // uri nodes.
+        children: [
+          {
+            title: "inside folder",
+            type: PlacesUtils.bookmarks.TYPE_FOLDER,
+            children: [
+              {
+                url: "place:sort=1",
+                title: "inside query",
+              },
+            ],
+          },
+        ],
+      },
+    ],
+  });
+
+  var query = hs.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.toolbarGuid]);
+  var options = hs.getNewQueryOptions();
+  options.excludeItems = true;
+
+  info("Check folder without uri nodes");
+  check_uri_nodes(query, options, 0);
+
+  info("Check folder with uri nodes");
+  // Add an uri node, this should be considered.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: bookmarks[0].guid,
+    url: "http://www.mozilla.org/",
+    title: "bookmark",
+  });
+  check_uri_nodes(query, options, 1);
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_getURLsForContainerNode_query() {
+  info("*** TEST: query");
+  // This is the query we will check for children.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "inside query",
+    url: `place:parent=${PlacesUtils.bookmarks.menuGuid}&sort=1`,
+  });
+
+  // Create a folder and a query node inside it, these should not be considered
+  // uri nodes.
+  await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.menuGuid,
+    children: [
+      {
+        title: "inside folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            url: "place:sort=1",
+            title: "inside query",
+          },
+        ],
+      },
+    ],
+  });
+
+  var query = hs.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.toolbarGuid]);
+  var options = hs.getNewQueryOptions();
+
+  info("Check query without uri nodes");
+  check_uri_nodes(query, options, 0);
+
+  info("Check query with uri nodes");
+  // Add an uri node, this should be considered.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: "http://www.mozilla.org/",
+    title: "bookmark",
+  });
+  check_uri_nodes(query, options, 1);
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_getURLsForContainerNode_query_excludeItems() {
+  info("*** TEST: excludeItems Query");
+  // This is the query we will check for children.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "inside query",
+    url: `place:parent=${PlacesUtils.bookmarks.menuGuid}&sort=1`,
+  });
+
+  // Create a folder and a query node inside it, these should not be considered
+  // uri nodes.
+  await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.menuGuid,
+    children: [
+      {
+        title: "inside folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            url: "place:sort=1",
+            title: "inside query",
+          },
+        ],
+      },
+    ],
+  });
+
+  var query = hs.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.toolbarGuid]);
+  var options = hs.getNewQueryOptions();
+  options.excludeItems = true;
+
+  info("Check folder without uri nodes");
+  check_uri_nodes(query, options, 0);
+
+  info("Check folder with uri nodes");
+  // Add an uri node, this should be considered.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: "http://www.mozilla.org/",
+    title: "bookmark",
+  });
+  check_uri_nodes(query, options, 1);
+
+  await PlacesUtils.bookmarks.eraseEverything();
+});
+
+add_task(async function test_getURLsForContainerNode_query_excludeQueries() {
+  info("*** TEST: !expandQueries Query");
+  // This is the query we will check for children.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+    title: "inside query",
+    url: `place:parent=${PlacesUtils.bookmarks.menuGuid}&sort=1`,
+  });
+
+  // Create a folder and a query node inside it, these should not be considered
+  // uri nodes.
+  await PlacesUtils.bookmarks.insertTree({
+    guid: PlacesUtils.bookmarks.menuGuid,
+    children: [
+      {
+        title: "inside folder",
+        type: PlacesUtils.bookmarks.TYPE_FOLDER,
+        children: [
+          {
+            url: "place:sort=1",
+            title: "inside query",
+          },
+        ],
+      },
+    ],
+  });
+
+  var query = hs.getNewQuery();
+  query.setParents([PlacesUtils.bookmarks.toolbarGuid]);
+  var options = hs.getNewQueryOptions();
+  options.expandQueries = false;
+
+  info("Check folder without uri nodes");
+  check_uri_nodes(query, options, 0);
+
+  info("Check folder with uri nodes");
+  // Add an uri node, this should be considered.
+  await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.menuGuid,
+    url: "http://www.mozilla.org/",
+    title: "bookmark",
+  });
+  check_uri_nodes(query, options, 1);
+});
+
+/**
+ * Executes a query and checks number of uri nodes in the first container in
+ * query's results.  To correctly test a container ensure that the query will
+ * return only your container in the first level.
+ *
+ * @param  aQuery
+ *         nsINavHistoryQuery object defining the query
+ * @param  aOptions
+ *         nsINavHistoryQueryOptions object defining the query's options
+ * @param  aExpectedURINodes
+ *         number of expected uri nodes
+ */
+function check_uri_nodes(aQuery, aOptions, aExpectedURINodes) {
+  var result = hs.executeQuery(aQuery, aOptions);
+  var root = result.root;
+  root.containerOpen = true;
+  var node = root.getChild(0);
+  Assert.equal(PU.hasChildURIs(node), aExpectedURINodes > 0);
+  Assert.equal(PU.getURLsForContainerNode(node).length, aExpectedURINodes);
+  root.containerOpen = false;
+}
diff --git a/toolkit/components/places/tests/unit/test_utils_timeConversion.js b/toolkit/components/places/tests/unit/test_utils_timeConversion.js
new file mode 100644
index 0000000000..c71effe709
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_utils_timeConversion.js
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Check time conversion utils.
+ */
+
+add_task(async function toDate() {
+  Assert.throws(() => PlacesUtils.toDate(), /Invalid value/, "Should throw");
+  Assert.throws(() => PlacesUtils.toDate(NaN), /Invalid value/, "Should throw");
+  Assert.throws(
+    () => PlacesUtils.toDate(null),
+    /Invalid value/,
+    "Should throw"
+  );
+  Assert.throws(() => PlacesUtils.toDate("1"), /Invalid value/, "Should throw");
+
+  const now = Date.now();
+  const usecs = now * 1000;
+  Assert.deepEqual(PlacesUtils.toDate(usecs), new Date(now));
+});
+
+add_task(async function toPRTime() {
+  Assert.throws(() => PlacesUtils.toPRTime(), /TypeError/, "Should throw");
+  Assert.throws(() => PlacesUtils.toPRTime(null), /TypeError/, "Should throw");
+  Assert.throws(
+    () => PlacesUtils.toPRTime({}),
+    /Invalid value/,
+    "Should throw"
+  );
+  Assert.throws(
+    () => PlacesUtils.toPRTime(NaN),
+    /Invalid value/,
+    "Should throw"
+  );
+  Assert.throws(
+    () => PlacesUtils.toPRTime(new Date(NaN)),
+    /Invalid value/,
+    "Should throw"
+  );
+  Assert.throws(
+    () => PlacesUtils.toPRTime(new URL("https://test.moz")),
+    /Invalid value/,
+    "Should throw"
+  );
+
+  const now = Date.now();
+  const usecs = now * 1000;
+  Assert.strictEqual(PlacesUtils.toPRTime(now), usecs);
+  Assert.strictEqual(PlacesUtils.toPRTime(new Date(now)), usecs);
+});
diff --git a/toolkit/components/places/tests/unit/test_visitsInDB.js b/toolkit/components/places/tests/unit/test_visitsInDB.js
new file mode 100644
index 0000000000..cbd0a04c4b
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_visitsInDB.js
@@ -0,0 +1,12 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+
+add_task(async function test_execute() {
+  const TEST_URI = uri("http://mozilla.com");
+
+  Assert.equal(0, await PlacesTestUtils.visitsInDB(TEST_URI));
+  await PlacesTestUtils.addVisits({ uri: TEST_URI });
+  Assert.equal(1, await PlacesTestUtils.visitsInDB(TEST_URI));
+  await PlacesTestUtils.addVisits({ uri: TEST_URI });
+  Assert.equal(2, await PlacesTestUtils.visitsInDB(TEST_URI));
+});
diff --git a/toolkit/components/places/tests/unit/xpcshell.toml b/toolkit/components/places/tests/unit/xpcshell.toml
new file mode 100644
index 0000000000..750e8ad9ea
--- /dev/null
+++ b/toolkit/components/places/tests/unit/xpcshell.toml
@@ -0,0 +1,210 @@
+[DEFAULT]
+head = "head_bookmarks.js"
+firefox-appdir = "browser"
+prefs = ["places.loglevel='All'"]
+support-files = [
+  "bookmarks.corrupt.html",
+  "bookmarks.json",
+  "bookmarks_corrupt.json",
+  "bookmarks.preplaces.html",
+  "bookmarks_html_localized.html",
+  "bookmarks_html_singleframe.html",
+  "bookmarks_iconuri.json",
+  "mobile_bookmarks_folder_import.json",
+  "mobile_bookmarks_folder_merge.json",
+  "mobile_bookmarks_multiple_folders.json",
+  "mobile_bookmarks_root_import.json",
+  "mobile_bookmarks_root_merge.json",
+]
+
+["test_1085291.js"]
+
+["test_1105208.js"]
+
+["test_1105866.js"]
+
+["test_1606731.js"]
+
+["test_331487.js"]
+
+["test_384370.js"]
+
+["test_385397.js"]
+
+["test_399266.js"]
+skip-if = ["os == 'linux'"] # Bug 821781
+
+["test_402799.js"]
+
+["test_412132.js"]
+
+["test_415460.js"]
+
+["test_415757.js"]
+
+["test_419792_node_tags_property.js"]
+
+["test_425563.js"]
+
+["test_429505_remove_shortcuts.js"]
+
+["test_433317_query_title_update.js"]
+
+["test_433525_hasChildren_crash.js"]
+
+["test_454977.js"]
+
+["test_463863.js"]
+
+["test_485442_crash_bug_nsNavHistoryQuery_GetUri.js"]
+
+["test_486978_sort_by_date_queries.js"]
+
+["test_536081.js"]
+
+["test_PlacesDBUtils_removeOldCorruptDBs.js"]
+
+["test_PlacesQuery_history.js"]
+
+["test_PlacesUtils_isRootItem.js"]
+
+["test_PlacesUtils_unwrapNodes_place.js"]
+
+["test_asyncExecuteLegacyQueries.js"]
+
+["test_async_transactions.js"]
+
+["test_autocomplete_match_fallbackTitle.js"]
+
+["test_bookmark-tags-changed_frequency.js"]
+
+["test_bookmarks_html.js"]
+
+["test_bookmarks_html_corrupt.js"]
+
+["test_bookmarks_html_escape_entities.js"]
+
+["test_bookmarks_html_import_tags.js"]
+
+["test_bookmarks_html_localized.js"]
+
+["test_bookmarks_html_singleframe.js"]
+
+["test_bookmarks_json.js"]
+
+["test_bookmarks_json_corrupt.js"]
+
+["test_bookmarks_restore_notification.js"]
+
+["test_broken_folderShortcut_result.js"]
+
+["test_browserhistory.js"]
+
+["test_childlessTags.js"]
+
+["test_frecency_decay.js"]
+
+["test_frecency_observers.js"]
+
+["test_frecency_origins_alternative.js"]
+
+["test_frecency_origins_recalc.js"]
+prefs = ["places.frecency.origins.alternative.featureGate=true"]
+
+["test_frecency_pages_alternative.js"]
+prefs = ["places.frecency.pages.alternative.featureGate=true"]
+
+["test_frecency_pages_recalc_alt.js"]
+prefs = ["places.frecency.pages.alternative.featureGate=true"]
+
+["test_frecency_recalc_triggers.js"]
+
+["test_frecency_recalculator.js"]
+
+["test_frecency_unvisited_bookmark.js"]
+
+["test_frecency_zero_updated.js"]
+
+["test_getChildIndex.js"]
+
+["test_get_query_param_sql_function.js"]
+
+["test_hash.js"]
+
+["test_history.js"]
+
+["test_history_clear.js"]
+
+["test_history_notifications.js"]
+
+["test_history_observer.js"]
+
+["test_history_sidebar.js"]
+
+["test_import_mobile_bookmarks.js"]
+
+["test_isPageInDB.js"]
+
+["test_isURIVisited.js"]
+
+["test_isvisited.js"]
+
+["test_keywords.js"]
+
+["test_lastModified.js"]
+
+["test_markpageas.js"]
+
+["test_metadata.js"]
+
+["test_missing_builtin_folders.js"]
+
+["test_missing_root_folder.js"]
+
+["test_multi_observation.js"]
+
+["test_multi_word_tags.js"]
+
+["test_nested_notifications.js"]
+
+["test_nsINavHistoryViewer.js"]
+
+["test_null_interfaces.js"]
+
+["test_origins.js"]
+
+["test_origins_parsing.js"]
+
+["test_pageGuid_bookmarkGuid.js"]
+
+["test_placeURIs.js"]
+
+["test_promiseBookmarksTree.js"]
+
+["test_resolveNullBookmarkTitles.js"]
+
+["test_result_sort.js"]
+
+["test_resultsAsVisit_details.js"]
+
+["test_sql_function_origin.js"]
+
+["test_sql_guid_functions.js"]
+
+["test_tag_autocomplete_search.js"]
+
+["test_tagging.js"]
+
+["test_telemetry.js"]
+
+["test_update_frecency_after_delete.js"]
+
+["test_utils_backups_create.js"]
+
+["test_utils_backups_hasRecent.js"]
+
+["test_utils_getURLsForContainerNode.js"]
+
+["test_utils_timeConversion.js"]
+
+["test_visitsInDB.js"]