Adding upstream version 124.0.1.upstream/124.0.1

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

87 files changed, 4950 insertions, 0 deletions

diff --git a/browser/components/originattributes/moz.build b/browser/components/originattributes/moz.build
new file mode 100644
index 0000000000..21b004095e
--- /dev/null
+++ b/browser/components/originattributes/moz.build
@@ -0,0 +1,14 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+BROWSER_CHROME_MANIFESTS += [
+    "test/browser/browser.toml",
+]
+
+MOCHITEST_MANIFESTS += ["test/mochitest/mochitest.toml"]
+
+with Files("**"):
+    BUG_COMPONENT = ("Core", "DOM: Security")
diff --git a/browser/components/originattributes/test/browser/blobify.worker.js b/browser/components/originattributes/test/browser/blobify.worker.js
new file mode 100644
index 0000000000..0bac973a15
--- /dev/null
+++ b/browser/components/originattributes/test/browser/blobify.worker.js
@@ -0,0 +1,47 @@
+// Wait for a string to be posted to this worker.
+// Create a blob containing this string, and then
+// post back a blob URL pointing to the blob.
+
+var postStringInBlob = function (blobObject) {
+  var fileReader = new FileReaderSync();
+  var result = fileReader.readAsText(blobObject);
+  postMessage(result);
+};
+
+self.addEventListener("message", e => {
+  if (e.data.what === "blobify") {
+    try {
+      let blobURL = URL.createObjectURL(new Blob([e.data.message]));
+      postMessage({ blobURL });
+    } catch (ex) {
+      postMessage({ error: ex.message });
+    }
+    return;
+  }
+
+  if (e.data.what === "deblobify") {
+    if ("error" in e.data.message) {
+      postMessage(e.data.message);
+      return;
+    }
+    let blobURL = e.data.message.blobURL,
+      xhr = new XMLHttpRequest();
+    try {
+      xhr.open("GET", blobURL, true);
+      xhr.onload = function () {
+        postStringInBlob(xhr.response);
+      };
+      xhr.onerror = function () {
+        postMessage({ error: "xhr error" });
+      };
+      xhr.responseType = "blob";
+      xhr.send();
+    } catch (ex) {
+      postMessage({ error: ex.message });
+    }
+
+    return;
+  }
+
+  postMessage("Invalid operation!");
+});
diff --git a/browser/components/originattributes/test/browser/browser.toml b/browser/components/originattributes/test/browser/browser.toml
new file mode 100644
index 0000000000..5585b2a914
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser.toml
@@ -0,0 +1,120 @@
+[DEFAULT]
+tags = "usercontextid firstpartyisolation originattributes"
+support-files = [
+  "blobify.worker.js",
+  "dummy.html",
+  "file_broadcastChannel.html",
+  "file_broadcastChanneliFrame.html",
+  "file_cache.html",
+  "file_favicon.html",
+  "file_favicon.png",
+  "file_favicon.png^headers^",
+  "file_favicon_cache.html",
+  "file_favicon_cache.png",
+  "file_favicon_thirdParty.html",
+  "file_firstPartyBasic.html",
+  "file_postMessage.html",
+  "file_postMessageSender.html",
+  "file_saveAs.sjs",
+  "file_sharedworker.html",
+  "file_shared.worker.js",
+  "file_thirdPartyChild.audio.ogg",
+  "file_thirdPartyChild.embed.png",
+  "file_thirdPartyChild.fetch.html",
+  "file_thirdPartyChild.font.woff",
+  "file_thirdPartyChild.iframe.html",
+  "file_thirdPartyChild.favicon.png",
+  "file_thirdPartyChild.img.png",
+  "file_thirdPartyChild.import.js",
+  "file_thirdPartyChild.link.css",
+  "file_thirdPartyChild.object.png",
+  "file_thirdPartyChild.request.html",
+  "file_thirdPartyChild.script.js",
+  "file_thirdPartyChild.sharedworker.js",
+  "file_thirdPartyChild.track.vtt",
+  "file_thirdPartyChild.video.ogv",
+  "file_thirdPartyChild.worker.fetch.html",
+  "file_thirdPartyChild.worker.js",
+  "file_thirdPartyChild.worker.request.html",
+  "file_thirdPartyChild.worker.xhr.html",
+  "file_thirdPartyChild.xhr.html",
+  "file_windowOpenerRestriction.html",
+  "file_windowOpenerRestrictionTarget.html",
+  "head.js",
+  "test.js",
+  "test.js^headers^",
+  "test.html",
+  "test2.html",
+  "test2.js",
+  "test2.js^headers^",
+  "test_firstParty.html",
+  "test_firstParty_cookie.html",
+  "test_firstParty_html_redirect.html",
+  "test_firstParty_http_redirect.html",
+  "test_firstParty_http_redirect.html^headers^",
+  "test_firstParty_http_redirect_to_same_domain.html",
+  "test_firstParty_http_redirect_to_same_domain.html^headers^",
+  "test_firstParty_iframe_http_redirect.html",
+  "test_firstParty_postMessage.html",
+  "test_form.html",
+  "window.html",
+  "window2.html",
+  "window3.html",
+  "window_redirect.html",
+  "!/toolkit/content/tests/browser/common/mockTransfer.js",
+]
+# We don't want to run tests using BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN
+# (5 - aka Dynamic First Party Isolation) yet.
+prefs = ["network.cookie.cookieBehavior=4"]
+
+["browser_blobURLIsolation.js"]
+skip-if = ["verify && debug && os == 'win'"]
+
+["browser_broadcastChannel.js"]
+
+["browser_cache.js"]
+skip-if = ["verify"]
+
+["browser_cacheAPI.js"]
+
+["browser_clientAuth.js"]
+skip-if = ["verify"]
+
+["browser_cookieIsolation.js"]
+
+["browser_favicon_firstParty.js"]
+
+["browser_favicon_userContextId.js"]
+
+["browser_firstPartyIsolation.js"]
+skip-if = ["debug"] #Bug 1345346
+
+["browser_firstPartyIsolation_aboutPages.js"]
+
+["browser_firstPartyIsolation_about_newtab.js"]
+
+["browser_firstPartyIsolation_blobURI.js"]
+
+["browser_firstPartyIsolation_js_uri.js"]
+
+["browser_firstPartyIsolation_saveAs.js"]
+
+["browser_httpauth.js"]
+
+["browser_imageCacheIsolation.js"]
+
+["browser_localStorageIsolation.js"]
+
+["browser_permissions.js"]
+
+["browser_postMessage.js"]
+
+["browser_sanitize.js"]
+skip-if = [
+  "os == 'win'", #Bug 1544810
+  "os == 'linux' && bits == 64", #Bug 1544810
+]
+
+["browser_sharedworker.js"]
+
+["browser_windowOpenerRestriction.js"]
diff --git a/browser/components/originattributes/test/browser/browser_blobURLIsolation.js b/browser/components/originattributes/test/browser/browser_blobURLIsolation.js
new file mode 100644
index 0000000000..b19aabf6d5
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_blobURLIsolation.js
@@ -0,0 +1,123 @@
+/**
+ * Bug 1264573 - A test case for blob url isolation.
+ */
+
+const TEST_PAGE =
+  "http://mochi.test:8888/browser/browser/components/" +
+  "originattributes/test/browser/file_firstPartyBasic.html";
+const SCRIPT_WORKER_BLOBIFY = "blobify.worker.js";
+
+function page_blobify(browser, input) {
+  return SpecialPowers.spawn(browser, [input], function (contentInput) {
+    return {
+      blobURL: content.URL.createObjectURL(new content.Blob([contentInput])),
+    };
+  });
+}
+
+function page_deblobify(browser, blobURL) {
+  return SpecialPowers.spawn(
+    browser,
+    [blobURL],
+    async function (contentBlobURL) {
+      if ("error" in contentBlobURL) {
+        return contentBlobURL;
+      }
+      contentBlobURL = contentBlobURL.blobURL;
+
+      function blobURLtoBlob(aBlobURL) {
+        return new content.Promise(function (resolve) {
+          let xhr = new content.XMLHttpRequest();
+          xhr.open("GET", aBlobURL, true);
+          xhr.onload = function () {
+            resolve(xhr.response);
+          };
+          xhr.onerror = function () {
+            resolve("xhr error");
+          };
+          xhr.responseType = "blob";
+          xhr.send();
+        });
+      }
+
+      function blobToString(blob) {
+        return new content.Promise(function (resolve) {
+          let fileReader = new content.FileReader();
+          fileReader.onload = function () {
+            resolve(fileReader.result);
+          };
+          fileReader.readAsText(blob);
+        });
+      }
+
+      let blob = await blobURLtoBlob(contentBlobURL);
+      if (blob == "xhr error") {
+        return "xhr error";
+      }
+
+      return blobToString(blob);
+    }
+  );
+}
+
+function workerIO(browser, what, message) {
+  return SpecialPowers.spawn(
+    browser,
+    [
+      {
+        scriptFile: SCRIPT_WORKER_BLOBIFY,
+        message: { message, what },
+      },
+    ],
+    function (args) {
+      if (!content.worker) {
+        content.worker = new content.Worker(args.scriptFile);
+      }
+      let promise = new content.Promise(function (resolve) {
+        let listenFunction = function (event) {
+          content.worker.removeEventListener("message", listenFunction);
+          resolve(event.data);
+        };
+        content.worker.addEventListener("message", listenFunction);
+      });
+      content.worker.postMessage(args.message);
+      return promise;
+    }
+  );
+}
+
+let worker_blobify = (browser, input) => workerIO(browser, "blobify", input);
+let worker_deblobify = (browser, blobURL) =>
+  workerIO(browser, "deblobify", blobURL);
+
+function doTest(blobify, deblobify) {
+  let blobURL = null;
+  return async function (browser) {
+    if (blobURL === null) {
+      let input = Math.random().toString();
+      blobURL = await blobify(browser, input);
+      return input;
+    }
+    let result = await deblobify(browser, blobURL);
+    blobURL = null;
+    return result;
+  };
+}
+
+let tests = [];
+for (let blobify of [page_blobify, worker_blobify]) {
+  for (let deblobify of [page_deblobify, worker_deblobify]) {
+    tests.push(doTest(blobify, deblobify));
+  }
+}
+
+async function setup() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["privacy.partition.bloburl_per_partition_key", false],
+      ["dom.security.https_first", false],
+    ],
+  });
+}
+
+IsolationTestTools.runTests(TEST_PAGE, tests, null, setup);
diff --git a/browser/components/originattributes/test/browser/browser_broadcastChannel.js b/browser/components/originattributes/test/browser/browser_broadcastChannel.js
new file mode 100644
index 0000000000..805df90c17
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_broadcastChannel.js
@@ -0,0 +1,55 @@
+/*
+ * Bug 1264571 - A test case of broadcast channels for first party isolation.
+ */
+
+const TEST_DOMAIN = "http://example.net/";
+const TEST_PATH =
+  TEST_DOMAIN + "browser/browser/components/originattributes/test/browser/";
+const TEST_PAGE = TEST_PATH + "file_broadcastChannel.html";
+
+// IsolationTestTools flushes all preferences
+// hence we explicitly pref off https-first mode
+async function prefOffHttpsFirstMode() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.security.https_first", false]],
+  });
+}
+
+async function doTest(aBrowser) {
+  let response = await SpecialPowers.spawn(aBrowser, [], async function () {
+    let displayItem = content.document.getElementById("display");
+
+    // If there is nothing in the 'display', we will try to send a message to
+    // the broadcast channel and wait until this message has been delivered.
+    // The way that how we make sure the message is delivered is based on an
+    // iframe which will reply everything it receives from the broadcast channel
+    // to the current window through the postMessage. So, we can know that the
+    // boradcast message is sent successfully when the window receives a message
+    // from the iframe.
+    if (displayItem.innerHTML === "") {
+      let data = Math.random().toString();
+
+      let receivedData = await new Promise(resolve => {
+        let listenFunc = event => {
+          content.removeEventListener("message", listenFunc);
+          resolve(event.data);
+        };
+
+        let bc = new content.BroadcastChannel("testBroadcastChannel");
+
+        content.addEventListener("message", listenFunc);
+        bc.postMessage(data);
+      });
+
+      Assert.equal(receivedData, data, "The value should be the same.");
+
+      return receivedData;
+    }
+
+    return displayItem.innerHTML;
+  });
+
+  return response;
+}
+
+IsolationTestTools.runTests(TEST_PAGE, doTest, null, prefOffHttpsFirstMode);
diff --git a/browser/components/originattributes/test/browser/browser_cache.js b/browser/components/originattributes/test/browser/browser_cache.js
new file mode 100644
index 0000000000..ea8f0fe803
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_cache.js
@@ -0,0 +1,350 @@
+/*
+ * Bug 1264577 - A test case for testing caches of various submodules.
+ *   This test case will load two pages that each page loads various resources
+ *   within the same third party domain for the same originAttributes or different
+ *   originAttributes. And then, it verifies the number of cache entries and
+ *   the originAttributes of loading channels. If these two pages belong to
+ *   the same originAttributes, the number of cache entries for a certain
+ *   resource would be one. Otherwise, it would be two.
+ */
+
+const CC = Components.Constructor;
+
+let protocolProxyService = Cc[
+  "@mozilla.org/network/protocol-proxy-service;1"
+].getService(Ci.nsIProtocolProxyService);
+
+const TEST_DOMAIN = "http://example.net";
+const TEST_PATH = "/browser/browser/components/originattributes/test/browser/";
+const TEST_PAGE = TEST_DOMAIN + TEST_PATH + "file_cache.html";
+
+let suffixes = [
+  "iframe.html",
+  "link.css",
+  "script.js",
+  "img.png",
+  "object.png",
+  "embed.png",
+  "xhr.html",
+  "worker.xhr.html",
+  "audio.ogg",
+  "video.ogv",
+  "track.vtt",
+  "fetch.html",
+  "worker.fetch.html",
+  "request.html",
+  "worker.request.html",
+  "import.js",
+  "worker.js",
+  "sharedworker.js",
+  "font.woff",
+];
+
+// A random value for isolating video/audio elements across different tests.
+let randomSuffix;
+
+function clearAllImageCaches() {
+  let tools = SpecialPowers.Cc["@mozilla.org/image/tools;1"].getService(
+    SpecialPowers.Ci.imgITools
+  );
+  let imageCache = tools.getImgCacheForDocument(window.document);
+  imageCache.clearCache(true); // true=chrome
+  imageCache.clearCache(false); // false=content
+}
+
+function cacheDataForContext(loadContextInfo) {
+  return new Promise(resolve => {
+    let cacheEntries = [];
+    let cacheVisitor = {
+      onCacheStorageInfo(num, consumption) {},
+      onCacheEntryInfo(uri, idEnhance) {
+        cacheEntries.push({ uri, idEnhance });
+      },
+      onCacheEntryVisitCompleted() {
+        resolve(cacheEntries);
+      },
+      QueryInterface: ChromeUtils.generateQI(["nsICacheStorageVisitor"]),
+    };
+    // Visiting the disk cache also visits memory storage so we do not
+    // need to use Services.cache2.memoryCacheStorage() here.
+    let storage = Services.cache2.diskCacheStorage(loadContextInfo);
+    storage.asyncVisitStorage(cacheVisitor, true);
+  });
+}
+
+let countMatchingCacheEntries = function (cacheEntries, domain, fileSuffix) {
+  return cacheEntries
+    .map(entry => entry.uri.asciiSpec)
+    .filter(spec => spec.includes(domain))
+    .filter(spec => spec.includes("file_thirdPartyChild." + fileSuffix)).length;
+};
+
+function observeChannels(onChannel) {
+  // We use a dummy proxy filter to catch all channels, even those that do not
+  // generate an "http-on-modify-request" notification, such as link preconnects.
+  let proxyFilter = {
+    applyFilter(aChannel, aProxy, aCallback) {
+      // We have the channel; provide it to the callback.
+      onChannel(aChannel);
+      // Pass on aProxy unmodified.
+      aCallback.onProxyFilterResult(aProxy);
+    },
+  };
+  protocolProxyService.registerChannelFilter(proxyFilter, 0);
+  // Return the stop() function:
+  return () => protocolProxyService.unregisterChannelFilter(proxyFilter);
+}
+
+function startObservingChannels(aMode) {
+  let stopObservingChannels = observeChannels(function (channel) {
+    let originalURISpec = channel.originalURI.spec;
+    if (originalURISpec.includes("example.net")) {
+      let loadInfo = channel.loadInfo;
+
+      switch (aMode) {
+        case TEST_MODE_FIRSTPARTY:
+          ok(
+            loadInfo.originAttributes.firstPartyDomain === "example.com" ||
+              loadInfo.originAttributes.firstPartyDomain === "example.org",
+            "first party for " +
+              originalURISpec +
+              " is " +
+              loadInfo.originAttributes.firstPartyDomain
+          );
+          break;
+
+        case TEST_MODE_NO_ISOLATION:
+          ok(
+            ChromeUtils.isOriginAttributesEqual(
+              loadInfo.originAttributes,
+              ChromeUtils.fillNonDefaultOriginAttributes()
+            ),
+            "OriginAttributes for " + originalURISpec + " is default."
+          );
+          break;
+
+        case TEST_MODE_CONTAINERS:
+          ok(
+            loadInfo.originAttributes.userContextId === 1 ||
+              loadInfo.originAttributes.userContextId === 2,
+            "userContextId for " +
+              originalURISpec +
+              " is " +
+              loadInfo.originAttributes.userContextId
+          );
+          break;
+
+        default:
+          ok(false, "Unknown test mode.");
+      }
+    }
+  });
+  return stopObservingChannels;
+}
+
+let stopObservingChannels;
+
+// The init function, which clears image and network caches, and generates
+// the random value for isolating video and audio elements across different
+// test runs.
+async function doInit(aMode) {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["network.predictor.enabled", false],
+      ["network.predictor.enable-prefetch", false],
+      ["privacy.partition.network_state", false],
+      ["dom.security.https_first", false],
+    ],
+  });
+  clearAllImageCaches();
+
+  Services.cache2.clear();
+
+  randomSuffix = Math.random();
+  stopObservingChannels = startObservingChannels(aMode);
+}
+
+// In the test function, we dynamically generate the video and audio element,
+// and assign a random suffix to their URL to isolate them across different
+// test runs.
+async function doTest(aBrowser) {
+  let argObj = {
+    randomSuffix,
+    urlPrefix: TEST_DOMAIN + TEST_PATH,
+  };
+
+  await SpecialPowers.spawn(aBrowser, [argObj], async function (arg) {
+    content.windowUtils.clearSharedStyleSheetCache();
+
+    let videoURL = arg.urlPrefix + "file_thirdPartyChild.video.ogv";
+    let audioURL = arg.urlPrefix + "file_thirdPartyChild.audio.ogg";
+    let trackURL = arg.urlPrefix + "file_thirdPartyChild.track.vtt";
+    let URLSuffix = "?r=" + arg.randomSuffix;
+
+    // Create the audio and video elements.
+    let audio = content.document.createElement("audio");
+    let video = content.document.createElement("video");
+    let audioSource = content.document.createElement("source");
+    let audioTrack = content.document.createElement("track");
+
+    // Append the audio and track element into the body, and wait until they're finished.
+    await new content.Promise(resolve => {
+      let audioLoaded = false;
+      let trackLoaded = false;
+
+      let audioListener = () => {
+        Assert.ok(true, `Audio suspended: ${audioURL + URLSuffix}`);
+        audio.removeEventListener("suspend", audioListener);
+
+        audioLoaded = true;
+        if (audioLoaded && trackLoaded) {
+          resolve();
+        }
+      };
+
+      let trackListener = () => {
+        Assert.ok(true, `Audio track loaded: ${audioURL + URLSuffix}`);
+        audioTrack.removeEventListener("load", trackListener);
+
+        trackLoaded = true;
+        if (audioLoaded && trackLoaded) {
+          resolve();
+        }
+      };
+
+      Assert.ok(true, `Loading audio: ${audioURL + URLSuffix}`);
+
+      // Add the event listeners before everything in case we lose events.
+      audioTrack.addEventListener("load", trackListener);
+      audio.addEventListener("suspend", audioListener);
+
+      // Assign attributes for the audio element.
+      audioSource.setAttribute("src", audioURL + URLSuffix);
+      audioSource.setAttribute("type", "audio/ogg");
+      audioTrack.setAttribute("src", trackURL);
+      audioTrack.setAttribute("kind", "subtitles");
+      audioTrack.setAttribute("default", true);
+
+      audio.appendChild(audioSource);
+      audio.appendChild(audioTrack);
+      audio.autoplay = true;
+
+      content.document.body.appendChild(audio);
+    });
+
+    // Append the video element into the body, and wait until it's finished.
+    await new content.Promise(resolve => {
+      let listener = () => {
+        Assert.ok(true, `Video suspended: ${videoURL + URLSuffix}`);
+        video.removeEventListener("suspend", listener);
+        resolve();
+      };
+
+      Assert.ok(true, `Loading video: ${videoURL + URLSuffix}`);
+
+      // Add the event listener before everything in case we lose the event.
+      video.addEventListener("suspend", listener);
+
+      // Assign attributes for the video element.
+      video.setAttribute("src", videoURL + URLSuffix);
+      video.setAttribute("type", "video/ogg");
+
+      content.document.body.appendChild(video);
+    });
+  });
+
+  return 0;
+}
+
+// The check function, which checks the number of cache entries.
+async function doCheck(aShouldIsolate, aInputA, aInputB) {
+  let expectedEntryCount = 1;
+  let data = [];
+  data = data.concat(
+    await cacheDataForContext(Services.loadContextInfo.default)
+  );
+  data = data.concat(
+    await cacheDataForContext(Services.loadContextInfo.private)
+  );
+  data = data.concat(
+    await cacheDataForContext(Services.loadContextInfo.custom(true, {}))
+  );
+  data = data.concat(
+    await cacheDataForContext(
+      Services.loadContextInfo.custom(false, { userContextId: 1 })
+    )
+  );
+  data = data.concat(
+    await cacheDataForContext(
+      Services.loadContextInfo.custom(true, { userContextId: 1 })
+    )
+  );
+  data = data.concat(
+    await cacheDataForContext(
+      Services.loadContextInfo.custom(false, { userContextId: 2 })
+    )
+  );
+  data = data.concat(
+    await cacheDataForContext(
+      Services.loadContextInfo.custom(true, { userContextId: 2 })
+    )
+  );
+  data = data.concat(
+    await cacheDataForContext(
+      Services.loadContextInfo.custom(false, {
+        firstPartyDomain: "example.com",
+      })
+    )
+  );
+  data = data.concat(
+    await cacheDataForContext(
+      Services.loadContextInfo.custom(true, { firstPartyDomain: "example.com" })
+    )
+  );
+  data = data.concat(
+    await cacheDataForContext(
+      Services.loadContextInfo.custom(false, {
+        firstPartyDomain: "example.org",
+      })
+    )
+  );
+  data = data.concat(
+    await cacheDataForContext(
+      Services.loadContextInfo.custom(true, { firstPartyDomain: "example.org" })
+    )
+  );
+
+  if (aShouldIsolate) {
+    expectedEntryCount = 2;
+  }
+
+  for (let suffix of suffixes) {
+    let foundEntryCount = countMatchingCacheEntries(
+      data,
+      "example.net",
+      suffix
+    );
+    let result = expectedEntryCount === foundEntryCount;
+    ok(
+      result,
+      "Cache entries expected for " +
+        suffix +
+        ": " +
+        expectedEntryCount +
+        ", and found " +
+        foundEntryCount
+    );
+  }
+
+  stopObservingChannels();
+  stopObservingChannels = undefined;
+  return true;
+}
+
+let testArgs = {
+  url: TEST_PAGE,
+  firstFrameSetting: DEFAULT_FRAME_SETTING,
+  secondFrameSetting: [TEST_TYPE_FRAME],
+};
+
+IsolationTestTools.runTests(testArgs, doTest, doCheck, doInit);
diff --git a/browser/components/originattributes/test/browser/browser_cacheAPI.js b/browser/components/originattributes/test/browser/browser_cacheAPI.js
new file mode 100644
index 0000000000..7ebdb0a1fe
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_cacheAPI.js
@@ -0,0 +1,24 @@
+const requestURL = "https://test1.example.com";
+
+function getResult(aBrowser) {
+  return SpecialPowers.spawn(aBrowser, [requestURL], async function (url) {
+    let cache = await content.caches.open("TEST_CACHE");
+    let response = await cache.match(url);
+    if (response) {
+      return response.statusText;
+    }
+    let result = Math.random().toString();
+    response = new content.Response("", { statusText: result });
+    await cache.put(url, response);
+    return result;
+  });
+}
+
+IsolationTestTools.runTests(
+  "https://test2.example.com",
+  getResult,
+  null,
+  null,
+  false,
+  /* aUseHttps */ true
+);
diff --git a/browser/components/originattributes/test/browser/browser_clientAuth.js b/browser/components/originattributes/test/browser/browser_clientAuth.js
new file mode 100644
index 0000000000..f93ec1dff2
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_clientAuth.js
@@ -0,0 +1,49 @@
+let certCached = true;
+let secondTabStarted = false;
+
+function onCertDialogLoaded(subject) {
+  certCached = false;
+  // Click OK.
+  subject.acceptDialog();
+}
+
+Services.obs.addObserver(onCertDialogLoaded, "cert-dialog-loaded");
+
+registerCleanupFunction(() => {
+  Services.obs.removeObserver(onCertDialogLoaded, "cert-dialog-loaded");
+});
+
+async function setup() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["security.default_personal_cert", "Ask Every Time"],
+      ["privacy.partition.network_state", false],
+    ],
+  });
+}
+
+function getResult() {
+  // The first tab always returns true.
+  if (!secondTabStarted) {
+    certCached = true;
+    secondTabStarted = true;
+    return true;
+  }
+
+  // The second tab returns true if the cert is cached, so it will be different
+  // from the result of the first tab, and considered isolated.
+  let ret = certCached;
+  certCached = true;
+  secondTabStarted = false;
+  return ret;
+}
+
+// aGetResultImmediately must be true because we need to get the result before
+// the next tab is opened.
+IsolationTestTools.runTests(
+  "https://requireclientcert.example.com",
+  getResult,
+  null, // aCompareResultFunc
+  setup, // aBeginFunc
+  true
+); // aGetResultImmediately
diff --git a/browser/components/originattributes/test/browser/browser_cookieIsolation.js b/browser/components/originattributes/test/browser/browser_cookieIsolation.js
new file mode 100644
index 0000000000..e10943e588
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_cookieIsolation.js
@@ -0,0 +1,43 @@
+/**
+ * Bug 1312541 - A test case for document.cookie isolation.
+ */
+
+const TEST_PAGE =
+  "https://example.net/browser/browser/components/" +
+  "originattributes/test/browser/file_firstPartyBasic.html";
+
+// Use a random key so we don't access it in later tests.
+const key = "key" + Math.random().toString();
+const re = new RegExp(key + "=([0-9.]+)");
+
+// Define the testing function
+function doTest(aBrowser) {
+  return SpecialPowers.spawn(
+    aBrowser,
+    [key, re],
+    function (contentKey, contentRe) {
+      let result = contentRe.exec(content.document.cookie);
+      if (result) {
+        return result[1];
+      }
+      // No value is found, so we create one.
+      let value = Math.random().toString();
+      content.document.cookie =
+        contentKey + "=" + value + "; SameSite=None; Secure;";
+      return value;
+    }
+  );
+}
+
+registerCleanupFunction(() => {
+  Services.cookies.removeAll();
+});
+
+IsolationTestTools.runTests(
+  TEST_PAGE,
+  doTest,
+  null,
+  null,
+  false,
+  true /* aUseHttps */
+);
diff --git a/browser/components/originattributes/test/browser/browser_favicon_firstParty.js b/browser/components/originattributes/test/browser/browser_favicon_firstParty.js
new file mode 100644
index 0000000000..300c2f9f25
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_favicon_firstParty.js
@@ -0,0 +1,511 @@
+/**
+ * Bug 1277803 - A test case for testing favicon loading across different first party domains.
+ */
+
+if (SpecialPowers.useRemoteSubframes) {
+  requestLongerTimeout(2);
+}
+
+const CC = Components.Constructor;
+
+const { PlacesTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/PlacesTestUtils.sys.mjs"
+);
+
+let EventUtils = {};
+Services.scriptloader.loadSubScript(
+  "chrome://mochikit/content/tests/SimpleTest/EventUtils.js",
+  EventUtils
+);
+
+const FIRST_PARTY_ONE = "example.com";
+const FIRST_PARTY_TWO = "example.org";
+const THIRD_PARTY = "example.net";
+
+const TEST_SITE_ONE = "https://" + FIRST_PARTY_ONE;
+const TEST_SITE_TWO = "https://" + FIRST_PARTY_TWO;
+const THIRD_PARTY_SITE = "https://" + THIRD_PARTY;
+const TEST_DIRECTORY =
+  "/browser/browser/components/originattributes/test/browser/";
+
+const TEST_PAGE = TEST_DIRECTORY + "file_favicon.html";
+const TEST_THIRD_PARTY_PAGE = TEST_DIRECTORY + "file_favicon_thirdParty.html";
+const TEST_CACHE_PAGE = TEST_DIRECTORY + "file_favicon_cache.html";
+
+const FAVICON_URI = TEST_DIRECTORY + "file_favicon.png";
+const TEST_FAVICON_CACHE_URI = TEST_DIRECTORY + "file_favicon_cache.png";
+
+const ICON_DATA =
+  "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAABH0lEQVRYw2P8////f4YBBEwMAwxGHcBCUMX/91DGOSj/BpT/DkpzQChGBSjfBErLQsVZhmoI/L8LpRdD6X1QietQGhYy7FB5aAgwmkLpBKi4BZTPMThDgBGjHIDF+f9mKD0fKvGBRKNdoF7sgPL1saaJwZgGDkJ9vpZMn8PAHqg5G9FyifBgD4H/W9HyOWrU/f+DIzHhkoeZxxgzZEIAVtJ9RxX+Q6DAxCmP3byhXxkxshAs5odqbcioAY3UC1CBLyTGOTqAmsfAOWRCwBvqxV0oIUB2OQAzDy3/D+a6wB7q8mCU2vD/nw94GziYIQOtDRn9oXz+IZMGBKGMbCjNh9Ii+v8HR4uIAUeLiEEbb9twELaIRlqrmHG0bzjiHQAA1LVfww8jwM4AAAAASUVORK5CYII=";
+
+let systemPrincipal = Services.scriptSecurityManager.getSystemPrincipal();
+
+function clearAllImageCaches() {
+  let tools = SpecialPowers.Cc["@mozilla.org/image/tools;1"].getService(
+    SpecialPowers.Ci.imgITools
+  );
+  let imageCache = tools.getImgCacheForDocument(window.document);
+  imageCache.clearCache(true); // true=chrome
+  imageCache.clearCache(false); // false=content
+}
+
+function clearAllPlacesFavicons() {
+  let faviconService = Cc["@mozilla.org/browser/favicon-service;1"].getService(
+    Ci.nsIFaviconService
+  );
+
+  return new Promise(resolve => {
+    let observer = {
+      observe(aSubject, aTopic, aData) {
+        if (aTopic === "places-favicons-expired") {
+          resolve();
+          Services.obs.removeObserver(observer, "places-favicons-expired");
+        }
+      },
+    };
+
+    Services.obs.addObserver(observer, "places-favicons-expired");
+    faviconService.expireAllFavicons();
+  });
+}
+
+function observeFavicon(aFirstPartyDomain, aExpectedCookie, aPageURI) {
+  let expectedPrincipal = Services.scriptSecurityManager.createContentPrincipal(
+    aPageURI,
+    { firstPartyDomain: aFirstPartyDomain }
+  );
+
+  return new Promise(resolve => {
+    let observer = {
+      observe(aSubject, aTopic, aData) {
+        // Make sure that the topic is 'http-on-modify-request'.
+        if (aTopic === "http-on-modify-request") {
+          // We check the firstPartyDomain for the originAttributes of the loading
+          // channel. All requests for the favicon should contain the correct
+          // firstPartyDomain. There are two requests for a favicon loading, one
+          // from the Places library and one from the XUL image. The difference
+          // of them is the loading principal. The Places will use the content
+          // principal and the XUL image will use the system principal.
+
+          let httpChannel = aSubject.QueryInterface(Ci.nsIHttpChannel);
+          let reqLoadInfo = httpChannel.loadInfo;
+          let loadingPrincipal = reqLoadInfo.loadingPrincipal;
+          let triggeringPrincipal = reqLoadInfo.triggeringPrincipal;
+
+          // Make sure this is a favicon request.
+          if (!httpChannel.URI.spec.endsWith(FAVICON_URI)) {
+            return;
+          }
+
+          // Check the first party domain.
+          is(
+            reqLoadInfo.originAttributes.firstPartyDomain,
+            aFirstPartyDomain,
+            "The loadInfo has correct first party domain"
+          );
+
+          ok(
+            loadingPrincipal.equals(expectedPrincipal),
+            "The loadingPrincipal of favicon loads should be the content prinicpal"
+          );
+          ok(
+            triggeringPrincipal.equals(expectedPrincipal),
+            "The triggeringPrincipal of favicon loads should be the content prinicpal"
+          );
+
+          let faviconCookie = httpChannel.getRequestHeader("cookie");
+
+          is(
+            faviconCookie,
+            aExpectedCookie,
+            "The cookie of the favicon loading is correct."
+          );
+        } else {
+          ok(false, "Received unexpected topic: ", aTopic);
+        }
+
+        Services.obs.removeObserver(observer, "http-on-modify-request");
+        resolve();
+      },
+    };
+
+    Services.obs.addObserver(observer, "http-on-modify-request");
+  });
+}
+
+function waitOnFaviconResponse(aFaviconURL) {
+  return new Promise(resolve => {
+    let observer = {
+      observe(aSubject, aTopic, aData) {
+        if (
+          aTopic === "http-on-examine-response" ||
+          aTopic === "http-on-examine-cached-response"
+        ) {
+          let httpChannel = aSubject.QueryInterface(Ci.nsIHttpChannel);
+          let loadInfo = httpChannel.loadInfo;
+
+          if (httpChannel.URI.spec !== aFaviconURL) {
+            return;
+          }
+
+          let result = {
+            topic: aTopic,
+            firstPartyDomain: loadInfo.originAttributes.firstPartyDomain,
+          };
+
+          resolve(result);
+          Services.obs.removeObserver(observer, "http-on-examine-response");
+          Services.obs.removeObserver(
+            observer,
+            "http-on-examine-cached-response"
+          );
+        }
+      },
+    };
+
+    Services.obs.addObserver(observer, "http-on-examine-response");
+    Services.obs.addObserver(observer, "http-on-examine-cached-response");
+  });
+}
+
+function waitOnFaviconLoaded(aFaviconURL) {
+  return PlacesTestUtils.waitForNotification("favicon-changed", events =>
+    events.some(e => e.faviconUrl == aFaviconURL)
+  );
+}
+
+async function openTab(aURL) {
+  let tab = BrowserTestUtils.addTab(gBrowser, aURL);
+
+  // Select tab and make sure its browser is focused.
+  gBrowser.selectedTab = tab;
+  tab.ownerGlobal.focus();
+
+  let browser = gBrowser.getBrowserForTab(tab);
+  await BrowserTestUtils.browserLoaded(browser);
+  return { tab, browser };
+}
+
+async function assignCookiesUnderFirstParty(aURL, aFirstParty, aCookieValue) {
+  // Open a tab under the given aFirstParty, and this tab will have an
+  // iframe which loads the aURL.
+  let tabInfo = await openTabInFirstParty(aURL, aFirstParty);
+
+  // Add cookies into the iframe.
+  await SpecialPowers.spawn(
+    tabInfo.browser,
+    [aCookieValue],
+    async function (value) {
+      content.document.cookie = value + "; SameSite=None; Secure;";
+    }
+  );
+
+  BrowserTestUtils.removeTab(tabInfo.tab);
+}
+
+async function generateCookies(aThirdParty) {
+  // we generate two different cookies for two first party domains.
+  let cookies = [];
+  cookies.push(Math.random().toString());
+  cookies.push(Math.random().toString());
+
+  let firstSiteURL;
+  let secondSiteURL;
+
+  if (aThirdParty) {
+    // Add cookies into the third party site with different first party domain.
+    firstSiteURL = THIRD_PARTY_SITE;
+    secondSiteURL = THIRD_PARTY_SITE;
+  } else {
+    // Add cookies into sites.
+    firstSiteURL = TEST_SITE_ONE;
+    secondSiteURL = TEST_SITE_TWO;
+  }
+
+  await assignCookiesUnderFirstParty(firstSiteURL, TEST_SITE_ONE, cookies[0]);
+  await assignCookiesUnderFirstParty(secondSiteURL, TEST_SITE_TWO, cookies[1]);
+
+  return cookies;
+}
+
+function assertIconIsData(item) {
+  let icon = item.getAttribute("image");
+  is(
+    icon.substring(0, 5),
+    "data:",
+    "Expected the image element to be a data URI"
+  );
+  is(icon, ICON_DATA, "Expected to see the correct data.");
+}
+
+async function doTest(aTestPage, aExpectedCookies, aFaviconURL) {
+  let firstPageURI = Services.io.newURI(TEST_SITE_ONE + aTestPage);
+  let secondPageURI = Services.io.newURI(TEST_SITE_TWO + aTestPage);
+
+  // Start to observe the event of that favicon has been fully loaded.
+  let promiseFaviconLoaded = waitOnFaviconLoaded(aFaviconURL);
+
+  // Start to observe the favicon requests earlier in case we miss it.
+  let promiseObserveFavicon = observeFavicon(
+    FIRST_PARTY_ONE,
+    aExpectedCookies[0],
+    firstPageURI
+  );
+
+  // Open the tab for the first site.
+  let tabInfo = await openTab(TEST_SITE_ONE + aTestPage);
+
+  // Waiting until favicon requests are all made.
+  await promiseObserveFavicon;
+
+  // Waiting until favicon loaded.
+  await promiseFaviconLoaded;
+
+  assertIconIsData(tabInfo.tab);
+
+  BrowserTestUtils.removeTab(tabInfo.tab);
+  // FIXME: We need to wait for the next event tick here to avoid observing
+  //        the previous tab info in the next step (bug 1446725).
+  await new Promise(executeSoon);
+
+  // Start to observe the favicon requests earlier in case we miss it.
+  promiseObserveFavicon = observeFavicon(
+    FIRST_PARTY_TWO,
+    aExpectedCookies[1],
+    secondPageURI
+  );
+
+  // Open the tab for the second site.
+  tabInfo = await openTab(TEST_SITE_TWO + aTestPage);
+
+  // Waiting until favicon requests are all made.
+  await promiseObserveFavicon;
+
+  BrowserTestUtils.removeTab(tabInfo.tab);
+}
+
+async function doTestForAllTabsFavicon(
+  aTestPage,
+  aExpectedCookies,
+  aIsThirdParty
+) {
+  let faviconURI = aIsThirdParty
+    ? THIRD_PARTY_SITE + FAVICON_URI
+    : TEST_SITE_ONE + FAVICON_URI;
+
+  // Set the 'overflow' attribute to make allTabs button available.
+  let tabBrowser = document.getElementById("tabbrowser-tabs");
+  tabBrowser.setAttribute("overflow", true);
+
+  // Start to observe the event of that the favicon has been fully loaded.
+  let promiseFaviconLoaded = waitOnFaviconLoaded(faviconURI);
+
+  // Open the tab for the first site.
+  let tabInfo = await openTab(TEST_SITE_ONE + aTestPage);
+
+  // Waiting until the favicon loaded.
+  await promiseFaviconLoaded;
+
+  assertIconIsData(tabInfo.tab);
+
+  gTabsPanel.init();
+
+  // Make the popup of allTabs showing up and trigger the loading of the favicon.
+  let allTabsView = document.getElementById("allTabsMenu-allTabsView");
+  let allTabsPopupShownPromise = BrowserTestUtils.waitForEvent(
+    allTabsView,
+    "ViewShown"
+  );
+  gTabsPanel.showAllTabsPanel();
+  await allTabsPopupShownPromise;
+
+  assertIconIsData(
+    gTabsPanel.allTabsViewTabs.lastElementChild.firstElementChild
+  );
+
+  // Close the popup of allTabs and wait until it's done.
+  let allTabsPopupHiddenPromise = BrowserTestUtils.waitForEvent(
+    allTabsView.panelMultiView,
+    "PanelMultiViewHidden"
+  );
+  gTabsPanel.hideAllTabsPanel();
+  await allTabsPopupHiddenPromise;
+
+  // Close the tab.
+  BrowserTestUtils.removeTab(tabInfo.tab);
+
+  faviconURI = aIsThirdParty
+    ? THIRD_PARTY_SITE + FAVICON_URI
+    : TEST_SITE_TWO + FAVICON_URI;
+
+  // Start to observe the event of that favicon has been fully loaded.
+  promiseFaviconLoaded = waitOnFaviconLoaded(faviconURI);
+
+  // Open the tab for the second site.
+  tabInfo = await openTab(TEST_SITE_TWO + aTestPage);
+
+  // Wait until the favicon is fully loaded.
+  await promiseFaviconLoaded;
+
+  assertIconIsData(tabInfo.tab);
+
+  // Make the popup of allTabs showing up again.
+  allTabsPopupShownPromise = BrowserTestUtils.waitForEvent(
+    allTabsView,
+    "ViewShown"
+  );
+  gTabsPanel.showAllTabsPanel();
+  await allTabsPopupShownPromise;
+
+  assertIconIsData(
+    gTabsPanel.allTabsViewTabs.lastElementChild.firstElementChild
+  );
+
+  // Close the popup of allTabs and wait until it's done.
+  allTabsPopupHiddenPromise = BrowserTestUtils.waitForEvent(
+    allTabsView.panelMultiView,
+    "PanelMultiViewHidden"
+  );
+  gTabsPanel.hideAllTabsPanel();
+  await allTabsPopupHiddenPromise;
+
+  // Close the tab.
+  BrowserTestUtils.removeTab(tabInfo.tab);
+
+  // Reset the 'overflow' attribute to make the allTabs button hidden again.
+  tabBrowser.removeAttribute("overflow");
+}
+
+add_setup(async function () {
+  // Make sure first party isolation is enabled.
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.firstparty.isolate", true]],
+  });
+});
+
+// A clean up function to prevent affecting other tests.
+registerCleanupFunction(() => {
+  // Clear all cookies.
+  Services.cookies.removeAll();
+
+  // Clear all image caches and network caches.
+  clearAllImageCaches();
+
+  Services.cache2.clear();
+});
+
+add_task(async function test_favicon_firstParty() {
+  for (let testThirdParty of [false, true]) {
+    // Clear all image caches and network caches before running the test.
+    clearAllImageCaches();
+
+    Services.cache2.clear();
+
+    // Clear Places favicon caches.
+    await clearAllPlacesFavicons();
+
+    let cookies = await generateCookies(testThirdParty);
+
+    if (testThirdParty) {
+      await doTest(
+        TEST_THIRD_PARTY_PAGE,
+        cookies,
+        THIRD_PARTY_SITE + FAVICON_URI
+      );
+    } else {
+      await doTest(TEST_PAGE, cookies, TEST_SITE_ONE + FAVICON_URI);
+    }
+  }
+});
+
+add_task(async function test_allTabs_favicon_firstParty() {
+  for (let testThirdParty of [false, true]) {
+    // Clear all image caches and network caches before running the test.
+    clearAllImageCaches();
+
+    Services.cache2.clear();
+
+    // Clear Places favicon caches.
+    await clearAllPlacesFavicons();
+
+    let cookies = await generateCookies(testThirdParty);
+
+    if (testThirdParty) {
+      await doTestForAllTabsFavicon(
+        TEST_THIRD_PARTY_PAGE,
+        cookies,
+        testThirdParty
+      );
+    } else {
+      await doTestForAllTabsFavicon(TEST_PAGE, cookies, testThirdParty);
+    }
+  }
+});
+
+add_task(async function test_favicon_cache_firstParty() {
+  // Clear all image caches and network caches before running the test.
+  clearAllImageCaches();
+
+  Services.cache2.clear();
+
+  // Start to observer the event of that favicon has been fully loaded and cached.
+  let promiseForFaviconLoaded = waitOnFaviconLoaded(
+    THIRD_PARTY_SITE + TEST_FAVICON_CACHE_URI
+  );
+
+  // Start to observer for the favicon response of the first tab.
+  let responsePromise = waitOnFaviconResponse(
+    THIRD_PARTY_SITE + TEST_FAVICON_CACHE_URI
+  );
+
+  // Open the tab for the first site.
+  let tabInfoA = await openTab(TEST_SITE_ONE + TEST_CACHE_PAGE);
+
+  // Waiting for the favicon response.
+  let response = await responsePromise;
+
+  // Make sure the favicon is loaded through the network and its first party domain is correct.
+  is(
+    response.topic,
+    "http-on-examine-response",
+    "The favicon image should be loaded through network."
+  );
+  is(
+    response.firstPartyDomain,
+    FIRST_PARTY_ONE,
+    "We should only observe the network response for the first first party."
+  );
+
+  // Waiting until the favicon has been loaded and cached.
+  await promiseForFaviconLoaded;
+
+  // Here, we are going to observe the favicon response for the third tab which
+  // opens with the second first party.
+  let promiseForFaviconResponse = waitOnFaviconResponse(
+    THIRD_PARTY_SITE + TEST_FAVICON_CACHE_URI
+  );
+
+  // Open the tab for the second site.
+  let tabInfoB = await openTab(TEST_SITE_TWO + TEST_CACHE_PAGE);
+
+  // Wait for the favicon response. In this case, we suppose to catch the
+  // response for the third tab but not the second tab since it will not
+  // go through the network.
+  response = await promiseForFaviconResponse;
+
+  // Check that the favicon response has came from the network and it has the
+  // correct first party domain.
+  is(
+    response.topic,
+    "http-on-examine-response",
+    "The favicon image should be loaded through network again."
+  );
+  is(
+    response.firstPartyDomain,
+    FIRST_PARTY_TWO,
+    "We should only observe the network response for the second first party."
+  );
+
+  BrowserTestUtils.removeTab(tabInfoA.tab);
+  BrowserTestUtils.removeTab(tabInfoB.tab);
+});
diff --git a/browser/components/originattributes/test/browser/browser_favicon_userContextId.js b/browser/components/originattributes/test/browser/browser_favicon_userContextId.js
new file mode 100644
index 0000000000..2f0a5d06a9
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_favicon_userContextId.js
@@ -0,0 +1,406 @@
+/**
+ * Bug 1277803 - A test caes for testing favicon loading across different userContextId.
+ */
+
+if (SpecialPowers.useRemoteSubframes) {
+  requestLongerTimeout(2);
+}
+
+let EventUtils = {};
+Services.scriptloader.loadSubScript(
+  "chrome://mochikit/content/tests/SimpleTest/EventUtils.js",
+  EventUtils
+);
+
+ChromeUtils.defineESModuleGetters(this, {
+  PlacesTestUtils: "resource://testing-common/PlacesTestUtils.sys.mjs",
+});
+
+const TEST_SITE = "https://example.org";
+const TEST_THIRD_PARTY_SITE = "https://example.net";
+
+const TEST_PAGE =
+  TEST_SITE +
+  "/browser/browser/components/originattributes/" +
+  "test/browser/file_favicon.html";
+const FAVICON_URI =
+  TEST_SITE +
+  "/browser/browser/components/originattributes/" +
+  "test/browser/file_favicon.png";
+const TEST_THIRD_PARTY_PAGE =
+  TEST_THIRD_PARTY_SITE +
+  "/browser/browser/components/originattributes/" +
+  "test/browser/file_favicon_thirdParty.html";
+const THIRD_PARTY_FAVICON_URI =
+  TEST_THIRD_PARTY_SITE +
+  "/browser/browser/components/" +
+  "originattributes/test/browser/file_favicon.png";
+
+const USER_CONTEXT_ID_PERSONAL = 1;
+const USER_CONTEXT_ID_WORK = 2;
+
+let systemPrincipal = Services.scriptSecurityManager.getSystemPrincipal();
+
+function clearAllImageCaches() {
+  var tools = SpecialPowers.Cc["@mozilla.org/image/tools;1"].getService(
+    SpecialPowers.Ci.imgITools
+  );
+  var imageCache = tools.getImgCacheForDocument(window.document);
+  imageCache.clearCache(true); // true=chrome
+  imageCache.clearCache(false); // false=content
+}
+
+function clearAllPlacesFavicons() {
+  let faviconService = Cc["@mozilla.org/browser/favicon-service;1"].getService(
+    Ci.nsIFaviconService
+  );
+
+  return new Promise(resolve => {
+    let observer = {
+      observe(aSubject, aTopic, aData) {
+        if (aTopic === "places-favicons-expired") {
+          resolve();
+          Services.obs.removeObserver(observer, "places-favicons-expired");
+        }
+      },
+    };
+
+    Services.obs.addObserver(observer, "places-favicons-expired");
+    faviconService.expireAllFavicons();
+  });
+}
+
+function FaviconObserver(
+  aUserContextId,
+  aExpectedCookie,
+  aPageURI,
+  aFaviconURL
+) {
+  this.reset(aUserContextId, aExpectedCookie, aPageURI, aFaviconURL);
+}
+
+FaviconObserver.prototype = {
+  observe(aSubject, aTopic, aData) {
+    // Make sure that the topic is 'http-on-modify-request'.
+    if (aTopic === "http-on-modify-request") {
+      // We check the userContextId for the originAttributes of the loading
+      // channel. All requests for the favicon should contain the correct
+      // userContextId. There are two requests for a favicon loading, one
+      // from the Places library and one from the XUL image. The difference
+      // of them is the loading principal. The Places will use the content
+      // principal and the XUL image will use the system principal.
+
+      let httpChannel = aSubject.QueryInterface(Ci.nsIHttpChannel);
+      let reqLoadInfo = httpChannel.loadInfo;
+      let loadingPrincipal, triggeringPrincipal;
+
+      // Make sure this is a favicon request.
+      if (httpChannel.URI.spec !== this._faviconURL) {
+        return;
+      }
+
+      if (reqLoadInfo) {
+        loadingPrincipal = reqLoadInfo.loadingPrincipal;
+        triggeringPrincipal = reqLoadInfo.triggeringPrincipal;
+      }
+
+      // Check the userContextId.
+      is(
+        reqLoadInfo.originAttributes.userContextId,
+        this._curUserContextId,
+        "The loadInfo has correct userContextId"
+      );
+
+      ok(
+        loadingPrincipal.equals(this._expectedPrincipal),
+        "The loadingPrincipal of favicon loading from content should be the content prinicpal"
+      );
+      ok(
+        triggeringPrincipal.equals(this._expectedPrincipal),
+        "The triggeringPrincipal of favicon loading from content should be the content prinicpal"
+      );
+
+      let faviconCookie = httpChannel.getRequestHeader("cookie");
+
+      is(
+        faviconCookie,
+        this._expectedCookie,
+        "The cookie of the favicon loading is correct."
+      );
+    } else {
+      ok(false, "Received unexpected topic: ", aTopic);
+    }
+
+    this._faviconLoaded.resolve();
+  },
+
+  reset(aUserContextId, aExpectedCookie, aPageURI, aFaviconURL) {
+    this._curUserContextId = aUserContextId;
+    this._expectedCookie = aExpectedCookie;
+    this._expectedPrincipal =
+      Services.scriptSecurityManager.createContentPrincipal(aPageURI, {
+        userContextId: aUserContextId,
+      });
+    this._faviconURL = aFaviconURL;
+    this._faviconLoaded = Promise.withResolvers();
+  },
+
+  get promise() {
+    return this._faviconLoaded.promise;
+  },
+};
+
+function waitOnFaviconLoaded(aFaviconURL) {
+  return PlacesTestUtils.waitForNotification("favicon-changed", events =>
+    events.some(e => e.faviconUrl == aFaviconURL)
+  );
+}
+
+async function generateCookies(aHost) {
+  // we generate two different cookies for two userContextIds.
+  let cookies = [];
+  cookies.push(Math.random().toString());
+  cookies.push(Math.random().toString());
+
+  // Then, we add cookies into the site for 'personal' and 'work'.
+  let tabInfoA = await openTabInUserContext(aHost, USER_CONTEXT_ID_PERSONAL);
+  let tabInfoB = await openTabInUserContext(aHost, USER_CONTEXT_ID_WORK);
+
+  await SpecialPowers.spawn(
+    tabInfoA.browser,
+    [cookies[0]],
+    async function (value) {
+      content.document.cookie = value;
+    }
+  );
+
+  await SpecialPowers.spawn(
+    tabInfoB.browser,
+    [cookies[1]],
+    async function (value) {
+      content.document.cookie = value;
+    }
+  );
+
+  BrowserTestUtils.removeTab(tabInfoA.tab);
+  BrowserTestUtils.removeTab(tabInfoB.tab);
+
+  return cookies;
+}
+
+async function doTest(aTestPage, aFaviconHost, aFaviconURL) {
+  let cookies = await generateCookies(aFaviconHost);
+  let pageURI = makeURI(aTestPage);
+
+  // Create the observer object for observing request channels of the personal
+  // container.
+  let observer = new FaviconObserver(
+    USER_CONTEXT_ID_PERSONAL,
+    cookies[0],
+    pageURI,
+    aFaviconURL
+  );
+
+  // Add the observer earlier in case we miss it.
+  let promiseWaitOnFaviconLoaded = waitOnFaviconLoaded(aFaviconURL);
+
+  Services.obs.addObserver(observer, "http-on-modify-request");
+
+  // Open the tab with the personal container.
+  let tabInfo = await openTabInUserContext(aTestPage, USER_CONTEXT_ID_PERSONAL);
+
+  // Waiting for favicon requests are all made.
+  await observer.promise;
+  // Waiting for favicon loaded.
+  await promiseWaitOnFaviconLoaded;
+
+  // Close the tab.
+  BrowserTestUtils.removeTab(tabInfo.tab);
+  // FIXME: We need to wait for the next event tick here to avoid observing
+  //        the previous tab info in the next step (bug 1446725).
+  await new Promise(executeSoon);
+
+  // Reset the observer for observing requests for the work container.
+  observer.reset(USER_CONTEXT_ID_WORK, cookies[1], pageURI, aFaviconURL);
+  tabInfo = await openTabInUserContext(aTestPage, USER_CONTEXT_ID_WORK);
+
+  // Waiting for favicon requests are all made.
+  await observer.promise;
+
+  Services.obs.removeObserver(observer, "http-on-modify-request");
+
+  BrowserTestUtils.removeTab(tabInfo.tab);
+}
+
+function assertIconIsData(item) {
+  is(
+    item.getAttribute("image").substring(0, 5),
+    "data:",
+    "Expected the image element to be a data URI"
+  );
+}
+
+async function doTestForAllTabsFavicon(aTestPage, aFaviconHost, aFaviconURL) {
+  await generateCookies(aFaviconHost);
+
+  // Set the 'overflow' attribute to make allTabs button available.
+  let tabBrowser = document.getElementById("tabbrowser-tabs");
+  tabBrowser.setAttribute("overflow", true);
+
+  // Add the observer earlier in case we miss it.
+  let promiseWaitOnFaviconLoaded = waitOnFaviconLoaded(aFaviconURL);
+
+  // Open the tab with the personal container.
+  let tabInfo = await openTabInUserContext(aTestPage, USER_CONTEXT_ID_PERSONAL);
+
+  // Waiting for favicon loaded.
+  await promiseWaitOnFaviconLoaded;
+
+  // We need to clear the image cache here for making sure the network request will
+  // be made for the favicon of allTabs menuitem.
+  clearAllImageCaches();
+
+  gTabsPanel.init();
+
+  // Make the popup of allTabs showing up and trigger the loading of the favicon.
+  let allTabsView = document.getElementById("allTabsMenu-allTabsView");
+  let allTabsPopupShownPromise = BrowserTestUtils.waitForEvent(
+    allTabsView,
+    "ViewShown"
+  );
+  gTabsPanel.showAllTabsPanel();
+  await allTabsPopupShownPromise;
+
+  assertIconIsData(
+    gTabsPanel.allTabsViewTabs.lastElementChild.firstElementChild
+  );
+
+  // Close the popup of allTabs and wait until it's done.
+  let allTabsPopupHiddenPromise = BrowserTestUtils.waitForEvent(
+    allTabsView.panelMultiView,
+    "PanelMultiViewHidden"
+  );
+  gTabsPanel.hideAllTabsPanel();
+  await allTabsPopupHiddenPromise;
+
+  // Close the tab.
+  BrowserTestUtils.removeTab(tabInfo.tab);
+  // FIXME: We need to wait for the next event tick here to avoid observing
+  //        the previous tab info in the next step (bug 1446725).
+  await new Promise(executeSoon);
+
+  // Open the tab under the work container and wait until the favicon is loaded.
+  promiseWaitOnFaviconLoaded = waitOnFaviconLoaded(aFaviconURL);
+  tabInfo = await openTabInUserContext(aTestPage, USER_CONTEXT_ID_WORK);
+  await promiseWaitOnFaviconLoaded;
+
+  // Clear the image cache again.
+  clearAllImageCaches();
+
+  // Make the popup of allTabs showing up again.
+  allTabsPopupShownPromise = BrowserTestUtils.waitForEvent(
+    allTabsView,
+    "ViewShown"
+  );
+  gTabsPanel.showAllTabsPanel();
+  await allTabsPopupShownPromise;
+
+  assertIconIsData(
+    gTabsPanel.allTabsViewTabs.lastElementChild.firstElementChild
+  );
+
+  // Close the popup of allTabs and wait until it's done.
+  allTabsPopupHiddenPromise = BrowserTestUtils.waitForEvent(
+    allTabsView.panelMultiView,
+    "PanelMultiViewHidden"
+  );
+  gTabsPanel.hideAllTabsPanel();
+  await allTabsPopupHiddenPromise;
+
+  // Close the tab.
+  BrowserTestUtils.removeTab(tabInfo.tab);
+
+  // Reset the 'overflow' attribute to make the allTabs button hidden again.
+  tabBrowser.removeAttribute("overflow");
+}
+
+add_setup(async function () {
+  // Make sure userContext is enabled.
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.userContext.enabled", true]],
+  });
+});
+
+// A clean up function to prevent affecting other tests.
+registerCleanupFunction(() => {
+  // Clear all cookies.
+  Services.cookies.removeAll();
+
+  // Clear all image caches and network caches.
+  clearAllImageCaches();
+
+  Services.cache2.clear();
+
+  // Clear Places favicon caches.
+  clearAllPlacesFavicons();
+});
+
+add_task(async function test_favicon_userContextId() {
+  // Clear all image caches before running the test.
+  clearAllImageCaches();
+
+  // Clear all network caches.
+  Services.cache2.clear();
+
+  // Clear Places favicon caches.
+  await clearAllPlacesFavicons();
+
+  await doTest(TEST_PAGE, TEST_SITE, FAVICON_URI);
+});
+
+add_task(async function test_thirdPartyFavicon_userContextId() {
+  // Clear all image caches before running the test.
+  clearAllImageCaches();
+
+  // Clear all network caches.
+  Services.cache2.clear();
+
+  // Clear Places favicon caches.
+  await clearAllPlacesFavicons();
+
+  await doTest(
+    TEST_THIRD_PARTY_PAGE,
+    TEST_THIRD_PARTY_SITE,
+    THIRD_PARTY_FAVICON_URI
+  );
+});
+
+add_task(async function test_allTabs_favicon_userContextId() {
+  // Clear all image caches before running the test.
+  clearAllImageCaches();
+
+  // Clear all network caches.
+  Services.cache2.clear();
+
+  // Clear Places favicon caches.
+  await clearAllPlacesFavicons();
+
+  await doTestForAllTabsFavicon(TEST_PAGE, TEST_SITE, FAVICON_URI);
+});
+
+add_task(async function test_allTabs_thirdPartyFavicon_userContextId() {
+  // Clear all image caches before running the test.
+  clearAllImageCaches();
+
+  // Clear all network caches.
+  Services.cache2.clear();
+
+  // Clear Places favicon caches.
+  await clearAllPlacesFavicons();
+
+  await doTestForAllTabsFavicon(
+    TEST_THIRD_PARTY_PAGE,
+    TEST_THIRD_PARTY_SITE,
+    THIRD_PARTY_FAVICON_URI
+  );
+});
diff --git a/browser/components/originattributes/test/browser/browser_firstPartyIsolation.js b/browser/components/originattributes/test/browser/browser_firstPartyIsolation.js
new file mode 100644
index 0000000000..feec6550e3
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_firstPartyIsolation.js
@@ -0,0 +1,511 @@
+const BASE_URL =
+  "https://example.net/browser/browser/components/originattributes/test/browser/";
+const EXAMPLE_BASE_URL = BASE_URL.replace("example.net", "example.com");
+const BASE_DOMAIN = "example.net";
+
+add_setup(async function () {
+  Services.prefs.setBoolPref("privacy.firstparty.isolate", true);
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("privacy.firstparty.isolate");
+    Services.cookies.removeAll();
+    Services.cache2.clear();
+  });
+});
+
+/**
+ * Test for the top-level document and child iframes should have the
+ * firstPartyDomain attribute.
+ */
+add_task(async function principal_test() {
+  let tab = BrowserTestUtils.addTab(
+    gBrowser,
+    BASE_URL + "test_firstParty.html"
+  );
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser, true, function (url) {
+    return url == BASE_URL + "test_firstParty.html";
+  });
+
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      Assert.ok(
+        true,
+        "document principal: " + content.document.nodePrincipal.origin
+      );
+      Assert.equal(
+        content.docShell.getOriginAttributes().firstPartyDomain,
+        "",
+        "top-level docShell shouldn't have firstPartyDomain attribute."
+      );
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The document should have firstPartyDomain"
+      );
+
+      for (let i = 1; i < 4; i++) {
+        let iframe = content.document.getElementById("iframe" + i);
+        await SpecialPowers.spawn(
+          iframe,
+          [attrs.firstPartyDomain],
+          function (firstPartyDomain) {
+            Assert.ok(
+              true,
+              "iframe principal: " + content.document.nodePrincipal.origin
+            );
+
+            Assert.equal(
+              content.docShell.getOriginAttributes().firstPartyDomain,
+              firstPartyDomain,
+              "iframe's docshell should have firstPartyDomain"
+            );
+
+            Assert.equal(
+              content.document.nodePrincipal.originAttributes.firstPartyDomain,
+              firstPartyDomain,
+              "iframe should have firstPartyDomain"
+            );
+          }
+        );
+      }
+    }
+  );
+
+  gBrowser.removeTab(tab);
+});
+
+/**
+ * Test for the cookie jars of the top-level document and child iframe should be
+ * isolated by firstPartyDomain.
+ */
+add_task(async function cookie_test() {
+  let tab = BrowserTestUtils.addTab(
+    gBrowser,
+    BASE_URL + "test_firstParty_cookie.html"
+  );
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser, true);
+
+  let count = 0;
+  for (let cookie of Services.cookies.cookies) {
+    count++;
+    Assert.equal(cookie.value, "foo", "Cookie value should be foo");
+    Assert.equal(
+      cookie.originAttributes.firstPartyDomain,
+      BASE_DOMAIN,
+      "Cookie's origin attributes should be " + BASE_DOMAIN
+    );
+  }
+
+  // one cookie is from requesting test.js from top-level doc, and the other from
+  // requesting test2.js from iframe test2.html.
+  Assert.equal(count, 2, "Should have two cookies");
+
+  gBrowser.removeTab(tab);
+});
+
+/**
+ * Test for after redirect, the top-level document should update the firstPartyDomain
+ * attribute. However if the redirect is happening on the iframe, the attribute
+ * should remain the same.
+ */
+add_task(async function redirect_test() {
+  let tab = BrowserTestUtils.addTab(
+    gBrowser,
+    BASE_URL + "test_firstParty_http_redirect.html"
+  );
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [{ firstPartyDomain: "example.com" }],
+    async function (attrs) {
+      Assert.ok(
+        true,
+        "document principal: " + content.document.nodePrincipal.origin
+      );
+      Assert.ok(true, "document uri: " + content.document.documentURI);
+
+      Assert.equal(
+        content.document.documentURI,
+        "https://example.com/browser/browser/components/originattributes/test/browser/dummy.html",
+        "The page should have been redirected to https://example.com/browser/browser/components/originattributes/test/browser/dummy.html"
+      );
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The document should have firstPartyDomain"
+      );
+    }
+  );
+
+  // Since this is a HTML redirect, we wait until the final page is loaded.
+  let tab2 = BrowserTestUtils.addTab(
+    gBrowser,
+    BASE_URL + "test_firstParty_html_redirect.html"
+  );
+  await BrowserTestUtils.browserLoaded(
+    tab2.linkedBrowser,
+    false,
+    function (url) {
+      return url == "https://example.com/";
+    }
+  );
+
+  await SpecialPowers.spawn(
+    tab2.linkedBrowser,
+    [{ firstPartyDomain: "example.com" }],
+    async function (attrs) {
+      Assert.ok(
+        true,
+        "2nd tab document principal: " + content.document.nodePrincipal.origin
+      );
+      Assert.ok(true, "2nd tab document uri: " + content.document.documentURI);
+      Assert.equal(
+        content.document.documentURI,
+        "https://example.com/",
+        "The page should have been redirected to https://example.com"
+      );
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The document should have firstPartyDomain"
+      );
+    }
+  );
+
+  let tab3 = BrowserTestUtils.addTab(
+    gBrowser,
+    BASE_URL + "test_firstParty_iframe_http_redirect.html"
+  );
+  await BrowserTestUtils.browserLoaded(
+    tab3.linkedBrowser,
+    true,
+    function (url) {
+      return url == BASE_URL + "test_firstParty_iframe_http_redirect.html";
+    }
+  );
+
+  // This redirect happens on the iframe, so unlike the two redirect tests above,
+  // the firstPartyDomain should still stick to the current top-level document,
+  // which is example.net.
+  await SpecialPowers.spawn(
+    tab3.linkedBrowser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      let iframe = content.document.getElementById("iframe1");
+      SpecialPowers.spawn(
+        iframe,
+        [attrs.firstPartyDomain],
+        function (firstPartyDomain) {
+          Assert.ok(
+            true,
+            "iframe document principal: " +
+              content.document.nodePrincipal.origin
+          );
+          Assert.ok(
+            true,
+            "iframe document uri: " + content.document.documentURI
+          );
+
+          Assert.equal(
+            content.document.documentURI,
+            "https://example.com/browser/browser/components/originattributes/test/browser/dummy.html",
+            "The page should have been redirected to https://example.com/browser/browser/components/originattributes/test/browser/dummy.html"
+          );
+
+          Assert.equal(
+            content.document.nodePrincipal.originAttributes.firstPartyDomain,
+            firstPartyDomain,
+            "The iframe should have firstPartyDomain: " + firstPartyDomain
+          );
+        }
+      );
+    }
+  );
+
+  gBrowser.removeTab(tab);
+  gBrowser.removeTab(tab2);
+  gBrowser.removeTab(tab3);
+});
+
+/**
+ * Test for postMessage between document and iframe.
+ */
+add_task(async function postMessage_test() {
+  let tab = BrowserTestUtils.addTab(
+    gBrowser,
+    BASE_URL + "test_firstParty_postMessage.html"
+  );
+
+  // The top-level page will post a message to its child iframe, and wait for
+  // another message from the iframe, once it receives the message, it will
+  // create another iframe, dummy.html.
+  // So we wait until dummy.html is loaded
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser, true, function (url) {
+    return url == BASE_URL + "dummy.html";
+  });
+
+  await SpecialPowers.spawn(tab.linkedBrowser, [], async function () {
+    Assert.ok(
+      true,
+      "document principal: " + content.document.nodePrincipal.origin
+    );
+    let value = content.document.getElementById("message").textContent;
+    Assert.equal(value, "OK");
+  });
+
+  gBrowser.removeTab(tab);
+});
+
+/**
+ * When the web page calls window.open, the new window should have the same
+ * firstPartyDomain attribute.
+ */
+add_task(async function openWindow_test() {
+  Services.prefs.setIntPref("browser.link.open_newwindow", 2);
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("browser.link.open_newwindow");
+  });
+
+  let tab = BrowserTestUtils.addTab(gBrowser, BASE_URL + "window.html");
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      let promise = new Promise(resolve => {
+        content.addEventListener("message", resolve, { once: true });
+      });
+      let w = Cu.unwaiveXrays(content.wrappedJSObject.open());
+      w.document.body.innerHTML = `<iframe id='iframe1' onload="window.opener.postMessage('ready', '*');" src='data:text/plain,test2'></iframe>`;
+
+      await promise;
+
+      Assert.equal(
+        w.docShell.getOriginAttributes().firstPartyDomain,
+        attrs.firstPartyDomain,
+        "window.open() should have correct firstPartyDomain attribute"
+      );
+      Assert.equal(
+        w.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The document should have correct firstPartyDomain"
+      );
+
+      let iframe = w.document.getElementById("iframe1");
+      await SpecialPowers.spawn(
+        iframe,
+        [attrs.firstPartyDomain],
+        function (firstPartyDomain) {
+          Assert.equal(
+            content.docShell.getOriginAttributes().firstPartyDomain,
+            firstPartyDomain,
+            "iframe's docshell should have correct rirstPartyDomain"
+          );
+
+          Assert.equal(
+            content.document.nodePrincipal.originAttributes.firstPartyDomain,
+            firstPartyDomain,
+            "iframe should have correct firstPartyDomain"
+          );
+        }
+      );
+
+      w.close();
+    }
+  );
+
+  gBrowser.removeTab(tab);
+});
+
+/**
+ * When the web page calls window.open, the top-level docshell in the new
+ * created window will have firstPartyDomain set.
+ */
+add_task(async function window_open_redirect_test() {
+  Services.prefs.setIntPref("browser.link.open_newwindow", 2);
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("browser.link.open_newwindow");
+  });
+
+  let tab = BrowserTestUtils.addTab(
+    gBrowser,
+    BASE_URL + "window_redirect.html"
+  );
+  let win = await BrowserTestUtils.waitForNewWindow({
+    url: BASE_URL + "dummy.html",
+  });
+
+  await SpecialPowers.spawn(
+    win.gBrowser.selectedBrowser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      Assert.equal(
+        content.docShell.getOriginAttributes().firstPartyDomain,
+        attrs.firstPartyDomain,
+        "window.open() should have firstPartyDomain attribute"
+      );
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The document should have firstPartyDomain"
+      );
+    }
+  );
+
+  gBrowser.removeTab(tab);
+  await BrowserTestUtils.closeWindow(win);
+});
+
+/**
+ * When the web page calls window.open, the top-level docshell in the new
+ * created window will inherit the firstPartyDomain attribute.
+ * However the top-level document will override the firstPartyDomain if the
+ * document is from another domain.
+ */
+add_task(async function window_open_iframe_test() {
+  Services.prefs.setIntPref("browser.link.open_newwindow", 2);
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("browser.link.open_newwindow");
+  });
+
+  let tab = BrowserTestUtils.addTab(gBrowser, BASE_URL + "window2.html");
+  let url = EXAMPLE_BASE_URL + "test_firstParty.html";
+  info("Waiting for window with url " + url);
+  let win = await BrowserTestUtils.waitForNewWindow({ url });
+
+  await SpecialPowers.spawn(
+    win.gBrowser.selectedBrowser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      Assert.equal(
+        content.docShell.getOriginAttributes().firstPartyDomain,
+        attrs.firstPartyDomain,
+        "window.open() should have firstPartyDomain attribute"
+      );
+
+      // The document is https://example.com/browser/browser/components/originattributes/test/browser/test_firstParty.html
+      // so the firstPartyDomain will be overriden to 'example.com'.
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        "example.com",
+        "The document should have firstPartyDomain"
+      );
+
+      let iframe = content.document.getElementById("iframe1");
+      SpecialPowers.spawn(iframe, [], function () {
+        Assert.equal(
+          content.docShell.getOriginAttributes().firstPartyDomain,
+          "example.com",
+          "iframe's docshell should have firstPartyDomain"
+        );
+        Assert.equal(
+          content.document.nodePrincipal.originAttributes.firstPartyDomain,
+          "example.com",
+          "iframe should have firstPartyDomain"
+        );
+      });
+    }
+  );
+
+  gBrowser.removeTab(tab);
+  await BrowserTestUtils.closeWindow(win);
+});
+
+/**
+ * Test for the loadInfo->TriggeringPrincipal is the document itself.
+ */
+add_task(async function form_test() {
+  let tab = BrowserTestUtils.addTab(gBrowser, BASE_URL + "test_form.html");
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The document should have firstPartyDomain"
+      );
+
+      let submit = content.document.getElementById("submit");
+      submit.click();
+    }
+  );
+
+  gBrowser.removeTab(tab);
+});
+
+/**
+ * Another test for loadInfo->TriggeringPrincipal in the window.open case.
+ */
+add_task(async function window_open_form_test() {
+  Services.prefs.setIntPref("browser.link.open_newwindow", 2);
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("browser.link.open_newwindow");
+  });
+
+  let tab = BrowserTestUtils.addTab(gBrowser, BASE_URL + "window3.html");
+  let url = EXAMPLE_BASE_URL + "test_form.html";
+  info("Waiting for window with url " + url);
+  let win = await BrowserTestUtils.waitForNewWindow({ url });
+
+  await SpecialPowers.spawn(
+    win.gBrowser.selectedBrowser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      Assert.equal(
+        content.docShell.getOriginAttributes().firstPartyDomain,
+        attrs.firstPartyDomain,
+        "window.open() should have firstPartyDomain attribute"
+      );
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        "example.com",
+        "The document should have firstPartyDomain"
+      );
+
+      let submit = content.document.getElementById("submit");
+      submit.click();
+    }
+  );
+
+  gBrowser.removeTab(tab);
+  await BrowserTestUtils.closeWindow(win);
+});
+
+/**
+ * A test for using an IP address as the first party domain.
+ */
+add_task(async function ip_address_test() {
+  const ipAddr = "127.0.0.1";
+  const ipHost = `http://${ipAddr}/browser/browser/components/originattributes/test/browser/`;
+
+  Services.prefs.setBoolPref("network.proxy.allow_hijacking_localhost", true);
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("network.proxy.allow_hijacking_localhost");
+  });
+
+  let tab = BrowserTestUtils.addTab(gBrowser, ipHost + "test_firstParty.html");
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser, true);
+
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [{ firstPartyDomain: ipAddr }],
+    async function (attrs) {
+      Assert.ok(
+        true,
+        "document principal: " + content.document.nodePrincipal.origin
+      );
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The firstPartyDomain should be set properly for the IP address"
+      );
+    }
+  );
+
+  gBrowser.removeTab(tab);
+});
diff --git a/browser/components/originattributes/test/browser/browser_firstPartyIsolation_aboutPages.js b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_aboutPages.js
new file mode 100644
index 0000000000..6e83a7fc33
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_aboutPages.js
@@ -0,0 +1,258 @@
+if (SpecialPowers.useRemoteSubframes) {
+  requestLongerTimeout(2);
+}
+
+add_setup(async function () {
+  Services.prefs.setBoolPref("privacy.firstparty.isolate", true);
+
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("privacy.firstparty.isolate");
+  });
+});
+
+/**
+ * For loading the initial about:blank in e10s mode, it will be loaded with
+ * NullPrincipal, and we also test if the firstPartyDomain of the origin
+ * attributes is got from the origin itself.
+ */
+add_task(async function test_remote_window_open_aboutBlank() {
+  let win = await BrowserTestUtils.openNewBrowserWindow({ remote: true });
+  let browser = win.gBrowser.selectedBrowser;
+
+  Assert.ok(browser.isRemoteBrowser, "should be a remote browser");
+
+  await SpecialPowers.spawn(browser, [], async function () {
+    Assert.ok(true, "origin " + content.document.nodePrincipal.origin);
+
+    Assert.ok(
+      content.document.nodePrincipal.isNullPrincipal,
+      "The principal of remote about:blank should be a NullPrincipal."
+    );
+
+    let str = content.document.nodePrincipal.originNoSuffix;
+    let expectDomain =
+      str.substring("moz-nullprincipal:{".length, str.length - 1) + ".mozilla";
+    Assert.equal(
+      content.document.nodePrincipal.originAttributes.firstPartyDomain,
+      expectDomain,
+      "remote about:blank should have firstPartyDomain set to " + expectDomain
+    );
+  });
+
+  win.close();
+});
+
+/**
+ * For loading the initial about:blank in non-e10s mode, it will be loaded with
+ * a null principal. So we test if it has correct firstPartyDomain set.
+ */
+add_task(async function test_nonremote_window_open_aboutBlank() {
+  if (SpecialPowers.useRemoteSubframes) {
+    ok(true, "We cannot test non-e10s mode in Fission. So, we skip this.");
+    return;
+  }
+
+  let win = await BrowserTestUtils.openNewBrowserWindow({ remote: false });
+  let browser = win.gBrowser.selectedBrowser;
+
+  Assert.ok(!browser.isRemoteBrowser, "shouldn't be a remote browser");
+
+  await SpecialPowers.spawn(browser, [], async function () {
+    info("origin " + content.document.nodePrincipal.origin);
+
+    Assert.ok(
+      content.document.nodePrincipal.isNullPrincipal,
+      "The principal of remote about:blank should be a NullPrincipal."
+    );
+
+    let str = content.document.nodePrincipal.originNoSuffix;
+    let expectDomain =
+      str.substring("moz-nullprincipal:{".length, str.length - 1) + ".mozilla";
+    Assert.equal(
+      content.document.nodePrincipal.originAttributes.firstPartyDomain,
+      expectDomain,
+      "non-remote about:blank should have firstPartyDomain set to " +
+        expectDomain
+    );
+  });
+
+  win.close();
+});
+
+/**
+ * Check if data: URI inherits firstPartyDomain from about:blank correctly.
+ */
+add_task(async function test_remote_window_open_data_uri() {
+  // allow top level data: URI navigations, otherwise
+  // <a href="data:" would fail.
+  await SpecialPowers.pushPrefEnv({
+    set: [["security.data_uri.block_toplevel_data_uri_navigations", false]],
+  });
+  let win = await BrowserTestUtils.openNewBrowserWindow({ remote: true });
+  let browser = win.gBrowser.selectedBrowser;
+
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.body.innerHTML = `
+      <a href="data:text/plain,hello" id="test">hello</a>`;
+
+    let element = content.document.getElementById("test");
+    element.click();
+  });
+
+  await BrowserTestUtils.browserLoaded(browser, false, function (url) {
+    return url == "data:text/plain,hello";
+  });
+
+  await SpecialPowers.spawn(browser, [], async function () {
+    Assert.ok(true, "origin: " + content.document.nodePrincipal.origin);
+
+    Assert.ok(
+      content.document.nodePrincipal.isNullPrincipal,
+      "The principal of data: document should be a NullPrincipal."
+    );
+
+    Assert.ok(
+      content.document.nodePrincipal.originAttributes.firstPartyDomain != "",
+      "data: URI should have firstPartyDomain set."
+    );
+  });
+
+  win.close();
+});
+
+/**
+ * data: document contains an iframe, and we test that iframe should inherit
+ * origin attributes from the data: document.
+ */
+add_task(async function test_remote_window_open_data_uri2() {
+  let win = await BrowserTestUtils.openNewBrowserWindow({ remote: true });
+  let browser = win.gBrowser.selectedBrowser;
+  const TEST_PAGE =
+    "https://example.net/browser/browser/components/originattributes/test/browser/test2.html";
+
+  // The iframe test2.html will fetch test2.js, which will have cookies.
+  const DATA_URI = `data:text/html,
+                    <iframe id="iframe1" src="${TEST_PAGE}"></iframe>`;
+  BrowserTestUtils.startLoadingURIString(browser, DATA_URI);
+  await BrowserTestUtils.browserLoaded(browser, true, TEST_PAGE);
+
+  await SpecialPowers.spawn(browser, [], async function () {
+    Assert.ok(true, "origin " + content.document.nodePrincipal.origin);
+
+    Assert.ok(
+      content.document.nodePrincipal.isNullPrincipal,
+      "The principal of data: document should be a NullPrincipal."
+    );
+
+    Assert.ok(
+      content.document.nodePrincipal.originAttributes.firstPartyDomain != "",
+      "data: URI should have firstPartyDomain set."
+    );
+
+    let iframe = content.document.getElementById("iframe1");
+    await SpecialPowers.spawn(
+      iframe,
+      [content.document.nodePrincipal.originAttributes.firstPartyDomain],
+      function (firstPartyDomain) {
+        Assert.ok(
+          true,
+          "iframe principal: " + content.document.nodePrincipal.origin
+        );
+
+        Assert.equal(
+          content.document.nodePrincipal.originAttributes.firstPartyDomain,
+          firstPartyDomain,
+          "iframe should inherit firstPartyDomain from parent document."
+        );
+        Assert.equal(
+          content.document.cookie,
+          "test2=foo",
+          "iframe should have cookies"
+        );
+      }
+    );
+  });
+
+  win.close();
+});
+
+/**
+ * about: pages should have firstPartyDomain set when we enable first party isolation.
+ */
+add_task(async function test_aboutURL() {
+  let aboutURLs = [];
+
+  // List of about: URLs that will initiate network requests.
+  let networkURLs = ["credits", "logins"];
+
+  for (let cid in Cc) {
+    let result = cid.match(
+      /@mozilla.org\/network\/protocol\/about;1\?what\=(.*)$/
+    );
+    if (!result) {
+      continue;
+    }
+
+    let aboutType = result[1];
+    let contract = "@mozilla.org/network/protocol/about;1?what=" + aboutType;
+    try {
+      let am = Cc[contract].getService(Ci.nsIAboutModule);
+      let uri = Services.io.newURI("about:" + aboutType);
+      let flags = am.getURIFlags(uri);
+
+      // We load pages with URI_SAFE_FOR_UNTRUSTED_CONTENT set, this means they
+      // are not loaded with System Principal but with content principal.
+      // Also we skip pages with HIDE_FROM_ABOUTABOUT, some of them may have
+      // errors while loading.
+      if (
+        flags & Ci.nsIAboutModule.URI_SAFE_FOR_UNTRUSTED_CONTENT &&
+        !(flags & Ci.nsIAboutModule.HIDE_FROM_ABOUTABOUT) &&
+        !networkURLs.includes(aboutType) &&
+        // handle about:newtab in browser_firstPartyIsolation_about_newtab.js
+        aboutType !== "newtab" &&
+        // protections kicks of async messaging as soon as it loads,
+        // this test closes the tab too soon causing errors
+        aboutType !== "protections"
+      ) {
+        aboutURLs.push(aboutType);
+      }
+    } catch (e) {
+      // getService might have thrown if the component doesn't actually
+      // implement nsIAboutModule
+    }
+  }
+
+  for (let url of aboutURLs) {
+    let tab = BrowserTestUtils.addTab(gBrowser, "about:" + url);
+    await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+    let attrs = {
+      firstPartyDomain: "about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla",
+    };
+    await SpecialPowers.spawn(
+      tab.linkedBrowser,
+      [{ attrs, url }],
+      async function (args) {
+        Assert.ok(
+          true,
+          "loading page about:" +
+            args.url +
+            ", origin is " +
+            content.document.nodePrincipal.origin
+        );
+        Assert.ok(true, "principal " + content.document.nodePrincipal);
+        Assert.equal(
+          content.document.nodePrincipal.originAttributes.firstPartyDomain,
+          args.attrs.firstPartyDomain,
+          "The about page should have firstPartyDomain set"
+        );
+        Assert.ok(
+          content.document.nodePrincipal.isContentPrincipal,
+          "The principal should be a content principal."
+        );
+      }
+    );
+
+    gBrowser.removeTab(tab);
+  }
+});
diff --git a/browser/components/originattributes/test/browser/browser_firstPartyIsolation_about_newtab.js b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_about_newtab.js
new file mode 100644
index 0000000000..b3e175c6a1
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_about_newtab.js
@@ -0,0 +1,55 @@
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["browser.newtab.preload", false],
+      ["privacy.firstparty.isolate", true],
+    ],
+  });
+});
+
+/**
+ * Test about:newtab will have firstPartytDomain set when we enable the pref.
+ *
+ * We split about:newtab from browser_firstPartyIsolation_aboutPages.js because
+ * about:newtab needs special care.
+ *
+ * In the original test browser_firstPartyIsolation_aboutPages.js, when calling
+ * tabbrowser.addTab, if it found out the uri is about:newtab, it will use
+ * the preloaded browser, however the preloaded browser is loaded before when we
+ * turn on the firstPartyIsolation pref, which won't have the pref set.
+ *
+ * To prevent to use the preloaded browser, a simple trick is open a window
+ * first.
+ **/
+add_task(async function test_aboutNewTab() {
+  // In Fission, we cannot open a non-remote window.
+  let win = await BrowserTestUtils.openNewBrowserWindow({
+    remote: SpecialPowers.useRemoteSubframes,
+  });
+  let gbrowser = win.gBrowser;
+  let tab = BrowserTestUtils.addTab(gbrowser, "about:newtab");
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  let attrs = {
+    firstPartyDomain: "about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla",
+  };
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [{ attrs }],
+    async function (args) {
+      Assert.ok(true, "principal " + content.document.nodePrincipal.origin);
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        args.attrs.firstPartyDomain,
+        "about:newtab should have firstPartyDomain set"
+      );
+      Assert.ok(
+        content.document.nodePrincipal.isContentPrincipal,
+        "The principal should be a content principal."
+      );
+    }
+  );
+
+  gbrowser.removeTab(tab);
+  win.close();
+});
diff --git a/browser/components/originattributes/test/browser/browser_firstPartyIsolation_blobURI.js b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_blobURI.js
new file mode 100644
index 0000000000..120e004e9a
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_blobURI.js
@@ -0,0 +1,116 @@
+add_setup(async function () {
+  Services.prefs.setBoolPref("privacy.firstparty.isolate", true);
+
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("privacy.firstparty.isolate");
+    Services.cookies.removeAll();
+  });
+});
+
+/**
+ * First we generate a Blob URI by using URL.createObjectURL(new Blob(..));
+ * then we navigate to this Blob URI, hence to make the top-level document URI
+ * is Blob URI.
+ * Later we create an iframe on this Blob: document, and we test that the iframe
+ * has correct firstPartyDomain.
+ */
+add_task(async function test_blob_uri_inherit_oa_from_content() {
+  const BASE_URI =
+    "http://mochi.test:8888/browser/browser/components/" +
+    "originattributes/test/browser/dummy.html";
+  const BASE_DOMAIN = "mochi.test";
+
+  // First we load a normal web page.
+  let win = await BrowserTestUtils.openNewBrowserWindow({ remote: true });
+  let browser = win.gBrowser.selectedBrowser;
+  BrowserTestUtils.startLoadingURIString(browser, BASE_URI);
+  await BrowserTestUtils.browserLoaded(browser);
+
+  // Then navigate to the blob: URI.
+  await SpecialPowers.spawn(
+    browser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      Assert.ok(true, "origin " + content.document.nodePrincipal.origin);
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The document should have firstPartyDomain"
+      );
+
+      // Now we use createObjectURL to generate a blob URI and navigate to it.
+      let url = content.window.URL.createObjectURL(
+        new content.window.Blob(
+          [
+            `<script src="http://mochi.test:8888/browser/browser/components/originattributes/test/browser/test.js"></script>`,
+          ],
+          { type: "text/html" }
+        )
+      );
+      content.document.location = url;
+    }
+  );
+
+  // Wait for the Blob: URI to be loaded.
+  await BrowserTestUtils.browserLoaded(browser, false, function (url) {
+    info("BrowserTestUtils.browserLoaded url=" + url);
+    return url.startsWith("blob:http://mochi.test:8888/");
+  });
+
+  // We verify the blob document has correct origin attributes.
+  // Then we inject an iframe to it.
+  await SpecialPowers.spawn(
+    browser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      Assert.ok(
+        content.document.documentURI.startsWith("blob:http://mochi.test:8888/"),
+        "the document URI should be a blob URI."
+      );
+      Assert.ok(true, "origin " + content.document.nodePrincipal.origin);
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        attrs.firstPartyDomain,
+        "The document should have firstPartyDomain"
+      );
+
+      let iframe = content.document.createElement("iframe");
+      iframe.src = "http://example.com";
+      iframe.id = "iframe1";
+      content.document.body.appendChild(iframe);
+
+      // Wait for the iframe to be loaded.
+      await new content.Promise(done => {
+        iframe.addEventListener(
+          "load",
+          function () {
+            done();
+          },
+          { capture: true, once: true }
+        );
+      });
+    }
+  );
+
+  // Finally we verify the iframe has correct origin attributes.
+  await SpecialPowers.spawn(
+    browser,
+    [{ firstPartyDomain: BASE_DOMAIN }],
+    async function (attrs) {
+      let iframe = content.document.getElementById("iframe1");
+      await SpecialPowers.spawn(
+        iframe,
+        [attrs.firstPartyDomain],
+        function (firstPartyDomain) {
+          Assert.equal(
+            content.document.nodePrincipal.originAttributes.firstPartyDomain,
+            firstPartyDomain,
+            "iframe should inherit firstPartyDomain from blob: URI"
+          );
+        }
+      );
+    }
+  );
+
+  win.close();
+});
diff --git a/browser/components/originattributes/test/browser/browser_firstPartyIsolation_js_uri.js b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_js_uri.js
new file mode 100644
index 0000000000..8aa199d47f
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_js_uri.js
@@ -0,0 +1,90 @@
+add_setup(async function () {
+  Services.prefs.setBoolPref("privacy.firstparty.isolate", true);
+
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref("privacy.firstparty.isolate");
+  });
+});
+
+add_task(async function test_remote_window_open_js_uri() {
+  let win = await BrowserTestUtils.openNewBrowserWindow({ remote: true });
+  let browser = win.gBrowser.selectedBrowser;
+
+  Assert.ok(browser.isRemoteBrowser, "should be a remote browser");
+
+  BrowserTestUtils.startLoadingURIString(browser, `javascript:1;`);
+
+  await BrowserTestUtils.browserLoaded(browser);
+
+  await SpecialPowers.spawn(browser, [], async function () {
+    Assert.ok(true, "origin " + content.document.nodePrincipal.origin);
+
+    Assert.ok(
+      content.document.nodePrincipal.isNullPrincipal,
+      "The principal of remote javascript: should be a NullPrincipal."
+    );
+
+    let str = content.document.nodePrincipal.originNoSuffix;
+    let expectDomain =
+      str.substring("moz-nullprincipal:{".length, str.length - 1) + ".mozilla";
+    Assert.equal(
+      content.document.nodePrincipal.originAttributes.firstPartyDomain,
+      expectDomain,
+      "remote javascript: should have firstPartyDomain set to " + expectDomain
+    );
+  });
+
+  win.close();
+});
+
+add_task(async function test_remote_window_open_js_uri2() {
+  let win = await BrowserTestUtils.openNewBrowserWindow({ remote: true });
+  let browser = win.gBrowser.selectedBrowser;
+
+  Assert.ok(browser.isRemoteBrowser, "should be a remote browser");
+
+  BrowserTestUtils.startLoadingURIString(
+    browser,
+    `javascript:
+    let iframe = document.createElement("iframe");
+    iframe.src = "http://example.com";
+    iframe.id = "iframe1";
+    document.body.appendChild(iframe);
+    void(0);
+ `
+  );
+
+  await BrowserTestUtils.browserLoaded(browser, true, function (url) {
+    info("URL:" + url);
+    return url == "http://example.com/";
+  });
+
+  await SpecialPowers.spawn(browser, [], async function () {
+    Assert.ok(true, "origin " + content.document.nodePrincipal.origin);
+
+    Assert.ok(
+      content.document.nodePrincipal.isNullPrincipal,
+      "The principal of remote javascript: should be a NullPrincipal."
+    );
+
+    let str = content.document.nodePrincipal.originNoSuffix;
+    let expectDomain =
+      str.substring("moz-nullprincipal:{".length, str.length - 1) + ".mozilla";
+    Assert.equal(
+      content.document.nodePrincipal.originAttributes.firstPartyDomain,
+      expectDomain,
+      "remote javascript: should have firstPartyDomain set to " + expectDomain
+    );
+
+    let iframe = content.document.getElementById("iframe1");
+    await SpecialPowers.spawn(iframe, [expectDomain], function (domain) {
+      Assert.equal(
+        content.document.nodePrincipal.originAttributes.firstPartyDomain,
+        domain,
+        "iframe should have firstPartyDomain set to " + domain
+      );
+    });
+  });
+
+  win.close();
+});
diff --git a/browser/components/originattributes/test/browser/browser_firstPartyIsolation_saveAs.js b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_saveAs.js
new file mode 100644
index 0000000000..b51ac12849
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_firstPartyIsolation_saveAs.js
@@ -0,0 +1,326 @@
+/**
+ * Bug 1508355 - A test case for ensuring the saving channel has a correct first
+ *               party domain when going through different "Save ... AS."
+ */
+
+"use strict";
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/toolkit/content/tests/browser/common/mockTransfer.js",
+  this
+);
+
+const TEST_FIRST_PARTY = "example.com";
+const TEST_ORIGIN = `http://${TEST_FIRST_PARTY}`;
+const TEST_BASE_PATH =
+  "/browser/browser/components/originattributes/test/browser/";
+const TEST_PATH = `${TEST_BASE_PATH}file_saveAs.sjs`;
+const TEST_PATH_VIDEO = `${TEST_BASE_PATH}file_thirdPartyChild.video.ogv`;
+const TEST_PATH_IMAGE = `${TEST_BASE_PATH}file_favicon.png`;
+
+// For the "Save Page As" test, we will check the channel of the sub-resource
+// within the page. In this case, it is a image.
+const TEST_PATH_PAGE = `${TEST_BASE_PATH}file_favicon.png`;
+
+// For the "Save Frame As" test, we will check the channel of the sub-resource
+// within the frame. In this case, it is a image.
+const TEST_PATH_FRAME = `${TEST_BASE_PATH}file_favicon.png`;
+
+let MockFilePicker = SpecialPowers.MockFilePicker;
+MockFilePicker.init(window);
+const tempDir = createTemporarySaveDirectory();
+MockFilePicker.displayDirectory = tempDir;
+
+add_setup(async function () {
+  info("Setting the prefs.");
+
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["privacy.firstparty.isolate", true],
+      ["dom.security.https_first", false],
+    ],
+  });
+
+  info("Setting MockFilePicker.");
+  mockTransferRegisterer.register();
+
+  registerCleanupFunction(function () {
+    mockTransferRegisterer.unregister();
+    MockFilePicker.cleanup();
+    tempDir.remove(true);
+  });
+});
+
+function createTemporarySaveDirectory() {
+  let saveDir = Services.dirsvc.get("TmpD", Ci.nsIFile);
+  saveDir.append("testsavedir");
+  saveDir.createUnique(Ci.nsIFile.DIRECTORY_TYPE, 0o755);
+  return saveDir;
+}
+
+function createPromiseForObservingChannel(aURL, aFirstParty) {
+  return new Promise(resolve => {
+    let observer = (aSubject, aTopic) => {
+      if (aTopic === "http-on-modify-request") {
+        let httpChannel = aSubject.QueryInterface(Ci.nsIHttpChannel);
+        let reqLoadInfo = httpChannel.loadInfo;
+
+        // Make sure this is the request which we want to check.
+        if (!httpChannel.URI.spec.endsWith(aURL)) {
+          return;
+        }
+
+        info(`Checking loadInfo for URI: ${httpChannel.URI.spec}\n`);
+        is(
+          reqLoadInfo.originAttributes.firstPartyDomain,
+          aFirstParty,
+          "The loadInfo has correct first party domain"
+        );
+
+        Services.obs.removeObserver(observer, "http-on-modify-request");
+        resolve();
+      }
+    };
+
+    Services.obs.addObserver(observer, "http-on-modify-request");
+  });
+}
+
+function createPromiseForTransferComplete() {
+  return new Promise(resolve => {
+    MockFilePicker.showCallback = fp => {
+      info("MockFilePicker showCallback");
+
+      let fileName = fp.defaultString;
+      let destFile = tempDir.clone();
+      destFile.append(fileName);
+
+      MockFilePicker.setFiles([destFile]);
+      MockFilePicker.filterIndex = 0; // kSaveAsType_Complete
+
+      MockFilePicker.showCallback = null;
+      mockTransferCallback = function (downloadSuccess) {
+        ok(downloadSuccess, "File should have been downloaded successfully");
+        mockTransferCallback = () => {};
+        resolve();
+      };
+    };
+  });
+}
+
+async function doCommandForFrameType() {
+  info("Opening the frame sub-menu under the context menu.");
+  let contextMenu = document.getElementById("contentAreaContextMenu");
+  let frameMenu = contextMenu.querySelector("#frame");
+  let frameMenuPopup = frameMenu.menupopup;
+  let frameMenuPopupPromise = BrowserTestUtils.waitForEvent(
+    frameMenuPopup,
+    "popupshown"
+  );
+
+  frameMenu.openMenu(true);
+  await frameMenuPopupPromise;
+
+  info("Triggering the save process.");
+  let saveFrameCommand = contextMenu.querySelector("#context-saveframe");
+  frameMenuPopup.activateItem(saveFrameCommand);
+}
+
+add_task(async function test_setup() {
+  // Make sure SearchService is ready for it to be called.
+  await Services.search.init();
+});
+
+add_task(async function testContextMenuSaveAs() {
+  const TEST_DATA = [
+    { type: "link", path: TEST_PATH, target: "#link1" },
+    { type: "video", path: TEST_PATH_VIDEO, target: "#video1" },
+    { type: "image", path: TEST_PATH_IMAGE, target: "#image1" },
+    { type: "page", path: TEST_PATH_PAGE, target: "body" },
+    {
+      type: "frame",
+      path: TEST_PATH_FRAME,
+      target: "body",
+      doCommandFunc: doCommandForFrameType,
+    },
+  ];
+
+  for (const data of TEST_DATA) {
+    info(`Open a new tab for testing "Save ${data.type} as" in context menu.`);
+    let tab = await BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      `${TEST_ORIGIN}${TEST_PATH}?${data.type}=1`
+    );
+
+    let popupShownPromise = BrowserTestUtils.waitForEvent(
+      document,
+      "popupshown"
+    );
+
+    let browser = gBrowser.selectedBrowser;
+
+    if (data.type === "frame") {
+      browser = await SpecialPowers.spawn(
+        tab.linkedBrowser,
+        [],
+        () => content.document.getElementById("frame1").browsingContext
+      );
+    }
+
+    info("Open the context menu.");
+    await BrowserTestUtils.synthesizeMouseAtCenter(
+      data.target,
+      {
+        type: "contextmenu",
+        button: 2,
+      },
+      browser
+    );
+
+    await popupShownPromise;
+
+    let transferCompletePromise = createPromiseForTransferComplete();
+    let observerPromise = createPromiseForObservingChannel(
+      data.path,
+      TEST_FIRST_PARTY
+    );
+
+    let contextMenu = document.getElementById("contentAreaContextMenu");
+    let popupHiddenPromise = BrowserTestUtils.waitForEvent(
+      contextMenu,
+      "popuphidden"
+    );
+
+    // Select "Save As" option from context menu.
+    if (!data.doCommandFunc) {
+      let saveElement = document.getElementById(`context-save${data.type}`);
+      info("Triggering the save process.");
+      contextMenu.activateItem(saveElement);
+    } else {
+      await data.doCommandFunc();
+    }
+
+    info("Waiting for the channel.");
+    await observerPromise;
+
+    info("Wait until the save is finished.");
+    await transferCompletePromise;
+
+    info("Wait until the menu is closed.");
+    await popupHiddenPromise;
+
+    BrowserTestUtils.removeTab(tab);
+  }
+});
+
+add_task(async function testFileMenuSavePageAs() {
+  info(`Open a new tab for testing "Save Page AS" in the file menu.`);
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    `${TEST_ORIGIN}${TEST_PATH}?page=1`
+  );
+
+  let transferCompletePromise = createPromiseForTransferComplete();
+  let observerPromise = createPromiseForObservingChannel(
+    TEST_PATH_PAGE,
+    TEST_FIRST_PARTY
+  );
+
+  let menubar = document.getElementById("main-menubar");
+  let filePopup = document.getElementById("menu_FilePopup");
+
+  // We only use the shortcut keys to open the file menu in Windows and Linux.
+  // Mac doesn't have a shortcut to only open the file menu. Instead, we directly
+  // trigger the save in MAC without any UI interactions.
+  if (Services.appinfo.OS !== "Darwin") {
+    let menubarActive = BrowserTestUtils.waitForEvent(
+      menubar,
+      "DOMMenuBarActive"
+    );
+    EventUtils.synthesizeKey("KEY_F10");
+    await menubarActive;
+
+    let popupShownPromise = BrowserTestUtils.waitForEvent(
+      filePopup,
+      "popupshown"
+    );
+    // In window, it still needs one extra down key to open the file menu.
+    if (Services.appinfo.OS === "WINNT") {
+      EventUtils.synthesizeKey("KEY_ArrowDown");
+    }
+    await popupShownPromise;
+  }
+
+  info("Triggering the save process.");
+  let fileSavePageAsElement = document.getElementById("menu_savePage");
+  fileSavePageAsElement.doCommand();
+
+  info("Waiting for the channel.");
+  await observerPromise;
+
+  info("Wait until the save is finished.");
+  await transferCompletePromise;
+
+  // Close the file menu.
+  if (Services.appinfo.OS !== "Darwin") {
+    let popupHiddenPromise = BrowserTestUtils.waitForEvent(
+      filePopup,
+      "popuphidden"
+    );
+    filePopup.hidePopup();
+    await popupHiddenPromise;
+  }
+
+  BrowserTestUtils.removeTab(tab);
+});
+
+add_task(async function testPageInfoMediaSaveAs() {
+  info(
+    `Open a new tab for testing "Save AS" in the media panel of the page info.`
+  );
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    `${TEST_ORIGIN}${TEST_PATH}?pageinfo=1`
+  );
+
+  info("Open the media panel of the pageinfo.");
+  let pageInfo = BrowserPageInfo(
+    gBrowser.selectedBrowser.currentURI.spec,
+    "mediaTab"
+  );
+
+  await BrowserTestUtils.waitForEvent(pageInfo, "page-info-init");
+
+  let imageTree = pageInfo.document.getElementById("imagetree");
+  let imageRowsNum = imageTree.view.rowCount;
+
+  is(imageRowsNum, 2, "There should be two media items here.");
+
+  for (let i = 0; i < imageRowsNum; i++) {
+    imageTree.view.selection.select(i);
+    imageTree.ensureRowIsVisible(i);
+    imageTree.focus();
+
+    let url = pageInfo.gImageView.data[i][0]; // COL_IMAGE_ADDRESS
+    info(`Start to save the media item with URL: ${url}`);
+
+    let transferCompletePromise = createPromiseForTransferComplete();
+    let observerPromise = createPromiseForObservingChannel(
+      url,
+      TEST_FIRST_PARTY
+    );
+
+    info("Triggering the save process.");
+    let saveElement = pageInfo.document.getElementById("imagesaveasbutton");
+    saveElement.doCommand();
+
+    info("Waiting for the channel.");
+    await observerPromise;
+
+    info("Wait until the save is finished.");
+    await transferCompletePromise;
+  }
+
+  pageInfo.close();
+  BrowserTestUtils.removeTab(tab);
+});
diff --git a/browser/components/originattributes/test/browser/browser_httpauth.js b/browser/components/originattributes/test/browser/browser_httpauth.js
new file mode 100644
index 0000000000..085d493c1b
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_httpauth.js
@@ -0,0 +1,79 @@
+let { HttpServer } = ChromeUtils.importESModule(
+  "resource://testing-common/httpd.sys.mjs"
+);
+
+let authPromptModalType = Services.prefs.getIntPref(
+  "prompts.modalType.httpAuth"
+);
+
+let commonDialogEnabled =
+  authPromptModalType === Services.prompt.MODAL_TYPE_WINDOW ||
+  (authPromptModalType === Services.prompt.MODAL_TYPE_TAB &&
+    Services.prefs.getBoolPref("prompts.tabChromePromptSubDialog"));
+
+let server = new HttpServer();
+server.registerPathHandler("/file.html", fileHandler);
+server.start(-1);
+
+let BASE_URI = "http://localhost:" + server.identity.primaryPort;
+let FILE_URI = BASE_URI + "/file.html";
+
+let credentialQueue = [];
+
+// Ask the user agent for authorization.
+function fileHandler(metadata, response) {
+  if (!metadata.hasHeader("Authorization")) {
+    response.setStatusLine(metadata.httpVersion, 401, "Unauthorized");
+    response.setHeader("WWW-Authenticate", 'Basic realm="User Visible Realm"');
+    return;
+  }
+
+  // This will be "account:password" encoded in base64.
+  credentialQueue.push(metadata.getHeader("Authorization"));
+
+  response.setStatusLine(metadata.httpVersion, 200, "OK");
+  response.setHeader("Content-Type", "text/html", false);
+  let body = "<html><body></body></html>";
+  response.bodyOutputStream.write(body, body.length);
+}
+
+function onCommonDialogLoaded(subject) {
+  let dialog;
+  if (commonDialogEnabled) {
+    dialog = subject.Dialog;
+  } else {
+    let promptBox =
+      subject.ownerGlobal.gBrowser.selectedBrowser.tabModalPromptBox;
+    dialog = promptBox.getPrompt(subject).Dialog;
+  }
+  // Submit random account and password
+  dialog.ui.loginTextbox.setAttribute("value", Math.random());
+  dialog.ui.password1Textbox.setAttribute("value", Math.random());
+  dialog.ui.button0.click();
+}
+
+let authPromptTopic = commonDialogEnabled
+  ? "common-dialog-loaded"
+  : "tabmodal-dialog-loaded";
+Services.obs.addObserver(onCommonDialogLoaded, authPromptTopic);
+
+registerCleanupFunction(() => {
+  Services.obs.removeObserver(onCommonDialogLoaded, authPromptTopic);
+  server.stop(() => {
+    server = null;
+  });
+});
+
+function getResult() {
+  // If two targets are isolated, they should get different credentials.
+  // Otherwise, the credentials will be cached and therefore the same.
+  return credentialQueue.shift();
+}
+
+async function doInit(aMode) {
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.partition.network_state", false]],
+  });
+}
+
+IsolationTestTools.runTests(FILE_URI, getResult, null, doInit);
diff --git a/browser/components/originattributes/test/browser/browser_imageCacheIsolation.js b/browser/components/originattributes/test/browser/browser_imageCacheIsolation.js
new file mode 100644
index 0000000000..34c77f746d
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_imageCacheIsolation.js
@@ -0,0 +1,92 @@
+/*
+ * Bug 1264572 - A test case for image cache isolation.
+ */
+
+requestLongerTimeout(2);
+
+let { HttpServer } = ChromeUtils.importESModule(
+  "resource://testing-common/httpd.sys.mjs"
+);
+
+const NUM_ISOLATION_LOADS = 2;
+const NUM_CACHED_LOADS = 1;
+
+let gHits = 0;
+
+let server = new HttpServer();
+server.registerPathHandler("/image.png", imageHandler);
+server.registerPathHandler("/file.html", fileHandler);
+server.start(-1);
+
+// Disable rcwn to make cache behavior deterministic.
+let rcwnEnabled = Services.prefs.getBoolPref("network.http.rcwn.enabled");
+Services.prefs.setBoolPref("network.http.rcwn.enabled", false);
+
+registerCleanupFunction(() => {
+  Services.prefs.setBoolPref("network.http.rcwn.enabled", rcwnEnabled);
+
+  server.stop(() => {
+    server = null;
+  });
+});
+
+let BASE_URI = "http://localhost:" + server.identity.primaryPort;
+let IMAGE_URI = BASE_URI + "/image.png";
+let FILE_URI = BASE_URI + "/file.html";
+
+function imageHandler(metadata, response) {
+  info("XXX: loading image from server");
+  gHits++;
+  response.setHeader("Cache-Control", "max-age=10000", false);
+  response.setStatusLine(metadata.httpVersion, 200, "OK");
+  response.setHeader("Content-Type", "image/png", false);
+  var body = atob(
+    "iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAEUlEQVQImWP4z8AAQTAamQkAhpcI+DeMzFcAAAAASUVORK5CYII="
+  );
+  response.bodyOutputStream.write(body, body.length);
+}
+
+function fileHandler(metadata, response) {
+  response.setStatusLine(metadata.httpVersion, 200, "OK");
+  response.setHeader("Content-Type", "text/html", false);
+  let body = `<html><body><image src=${IMAGE_URI}></body></html>`;
+  response.bodyOutputStream.write(body, body.length);
+}
+
+async function doBefore() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.partition.network_state", false]],
+  });
+
+  // reset hit counter
+  info("XXX resetting gHits");
+  gHits = 0;
+  info("XXX clearing image cache");
+  let imageCache = Cc["@mozilla.org/image/tools;1"]
+    .getService(Ci.imgITools)
+    .getImgCacheForDocument(null);
+  imageCache.clearCache(true);
+  imageCache.clearCache(false);
+  info("XXX clearning network cache");
+  Services.cache2.clear();
+}
+
+// the test function does nothing on purpose.
+function doTest(aBrowser) {
+  return 0;
+}
+
+// the check function
+function doCheck(shouldIsolate, a, b) {
+  // if we're doing first party isolation and the image cache isolation is
+  // working, then gHits should be 2 because the image would have been loaded
+  // one per first party domain.  if first party isolation is disabled, then
+  // gHits should be 1 since there would be one image load from the server and
+  // one load from the image cache.
+  info(`XXX check: gHits == ${gHits}, shouldIsolate == ${shouldIsolate}`);
+  return shouldIsolate
+    ? gHits == NUM_ISOLATION_LOADS
+    : gHits == NUM_CACHED_LOADS;
+}
+
+IsolationTestTools.runTests(FILE_URI, doTest, doCheck, doBefore);
diff --git a/browser/components/originattributes/test/browser/browser_localStorageIsolation.js b/browser/components/originattributes/test/browser/browser_localStorageIsolation.js
new file mode 100644
index 0000000000..68990f6ea4
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_localStorageIsolation.js
@@ -0,0 +1,33 @@
+/**
+ * Bug 1264567 - A test case for localStorage isolation.
+ */
+
+const TEST_PAGE =
+  "http://mochi.test:8888/browser/browser/components/" +
+  "originattributes/test/browser/file_firstPartyBasic.html";
+
+// Use a random key so we don't access it in later tests.
+const key = Math.random().toString();
+
+// IsolationTestTools flushes all preferences
+// hence we explicitly pref off https-first mode
+async function prefOffHttpsFirstMode() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.security.https_first", false]],
+  });
+}
+
+// Define the testing function
+function doTest(aBrowser) {
+  return SpecialPowers.spawn(aBrowser, [key], function (contentKey) {
+    let value = content.localStorage.getItem(contentKey);
+    if (value === null) {
+      // No value is found, so we create one.
+      value = Math.random().toString();
+      content.localStorage.setItem(contentKey, value);
+    }
+    return value;
+  });
+}
+
+IsolationTestTools.runTests(TEST_PAGE, doTest, null, prefOffHttpsFirstMode);
diff --git a/browser/components/originattributes/test/browser/browser_permissions.js b/browser/components/originattributes/test/browser/browser_permissions.js
new file mode 100644
index 0000000000..27819e6443
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_permissions.js
@@ -0,0 +1,91 @@
+/**
+ * Bug 1282655 - Test if site permissions are universal across origin attributes.
+ *
+ * This test is testing the cookie "permission" for a specific URI.
+ */
+
+const { PermissionTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/PermissionTestUtils.sys.mjs"
+);
+
+const TEST_PAGE = "https://example.net";
+const uri = Services.io.newURI(TEST_PAGE);
+
+async function disableCookies() {
+  Services.cookies.removeAll();
+  PermissionTestUtils.add(uri, "cookie", Services.perms.DENY_ACTION);
+
+  // A workaround for making this test working. In Bug 1330467, we separate the
+  // permissions between different firstPartyDomains, but not for the
+  // userContextID and the privateBrowsingId. So we need to manually add the
+  // permission for FPDs in order to make this test working. This test should be
+  // eventually removed once the permissions are isolated by OAs.
+  let principal = Services.scriptSecurityManager.createContentPrincipal(uri, {
+    firstPartyDomain: "example.com",
+  });
+  PermissionTestUtils.add(principal, "cookie", Services.perms.DENY_ACTION);
+
+  principal = Services.scriptSecurityManager.createContentPrincipal(uri, {
+    firstPartyDomain: "example.org",
+  });
+  PermissionTestUtils.add(principal, "cookie", Services.perms.DENY_ACTION);
+}
+
+async function ensureCookieNotSet(aBrowser) {
+  await SpecialPowers.spawn(aBrowser, [], async function () {
+    content.document.cookie = "key=value; SameSite=None; Secure;";
+    Assert.equal(
+      content.document.cookie,
+      "",
+      "Setting/reading cookies should be disabled" +
+        " for this domain for all origin attribute combinations."
+    );
+  });
+}
+
+IsolationTestTools.runTests(
+  TEST_PAGE,
+  ensureCookieNotSet,
+  () => true,
+  disableCookies
+);
+
+async function enableCookies() {
+  Services.cookies.removeAll();
+  PermissionTestUtils.add(uri, "cookie", Services.perms.ALLOW_ACTION);
+
+  // A workaround for making this test working.
+  let principal = Services.scriptSecurityManager.createContentPrincipal(uri, {
+    firstPartyDomain: "example.com",
+  });
+  PermissionTestUtils.add(principal, "cookie", Services.perms.ALLOW_ACTION);
+
+  principal = Services.scriptSecurityManager.createContentPrincipal(uri, {
+    firstPartyDomain: "example.org",
+  });
+  PermissionTestUtils.add(principal, "cookie", Services.perms.ALLOW_ACTION);
+}
+
+async function ensureCookieSet(aBrowser) {
+  await SpecialPowers.spawn(aBrowser, [], function () {
+    content.document.cookie = "key=value; SameSite=None; Secure;";
+    Assert.equal(
+      content.document.cookie,
+      "key=value",
+      "Setting/reading cookies should be" +
+        " enabled for this domain for all origin attribute combinations."
+    );
+  });
+}
+
+IsolationTestTools.runTests(
+  TEST_PAGE,
+  ensureCookieSet,
+  () => true,
+  enableCookies
+);
+
+registerCleanupFunction(() => {
+  SpecialPowers.clearUserPref("network.cookie.sameSite.laxByDefault");
+  Services.cookies.removeAll();
+});
diff --git a/browser/components/originattributes/test/browser/browser_postMessage.js b/browser/components/originattributes/test/browser/browser_postMessage.js
new file mode 100644
index 0000000000..a293213757
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_postMessage.js
@@ -0,0 +1,121 @@
+/**
+ * Bug 1492607 - Test for assuring that postMessage cannot go across OAs.
+ */
+
+const FPD_ONE = "http://example.com";
+const FPD_TWO = "http://example.org";
+
+const TEST_BASE = "/browser/browser/components/originattributes/test/browser/";
+
+add_setup(async function () {
+  // Make sure first party isolation is enabled.
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["privacy.firstparty.isolate", true],
+      ["dom.security.https_first", false],
+    ],
+  });
+});
+
+async function runTestWithOptions(
+  aDifferentFPD,
+  aStarTargetOrigin,
+  aBlockAcrossFPD
+) {
+  let testPageURL = aDifferentFPD
+    ? FPD_ONE + TEST_BASE + "file_postMessage.html"
+    : FPD_TWO + TEST_BASE + "file_postMessage.html";
+
+  // Deciding the targetOrigin according to the test setting.
+  let targetOrigin;
+  if (aStarTargetOrigin) {
+    targetOrigin = "*";
+  } else {
+    targetOrigin = aDifferentFPD ? FPD_ONE : FPD_TWO;
+  }
+  let senderURL =
+    FPD_TWO + TEST_BASE + `file_postMessageSender.html?${targetOrigin}`;
+
+  // Open a tab to listen messages.
+  let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, testPageURL);
+
+  // Use window.open() in the tab to open the sender tab. The sender tab
+  // will send a message through postMessage to window.opener.
+  let senderTabPromise = BrowserTestUtils.waitForNewTab(
+    gBrowser,
+    senderURL,
+    true
+  );
+  SpecialPowers.spawn(tab.linkedBrowser, [senderURL], aSenderPath => {
+    content.open(aSenderPath, "_blank");
+  });
+
+  // Wait and get the tab of the sender tab.
+  let senderTab = await senderTabPromise;
+
+  // The postMessage should be blocked when the first parties are different with
+  // the following two cases. First, it is using a non-star target origin.
+  // Second, it is using the star target origin and the pref
+  // 'privacy.firstparty.isolate.block_post_message' is true.
+  let shouldBlock = aDifferentFPD && (!aStarTargetOrigin || aBlockAcrossFPD);
+
+  await SpecialPowers.spawn(tab.linkedBrowser, [shouldBlock], async aValue => {
+    await new Promise(resolve => {
+      content.addEventListener("message", async function eventHandler(aEvent) {
+        if (aEvent.data === "Self") {
+          let display = content.document.getElementById("display");
+          if (aValue) {
+            Assert.equal(
+              display.innerHTML,
+              "",
+              "It should not get a message from other OA."
+            );
+          } else {
+            await ContentTaskUtils.waitForCondition(
+              () => display.innerHTML == "Message",
+              "Wait for message to arrive"
+            );
+            Assert.equal(
+              display.innerHTML,
+              "Message",
+              "It should get a message from the same OA."
+            );
+          }
+
+          content.removeEventListener("message", eventHandler);
+          resolve();
+        }
+      });
+
+      // Trigger the content to send a postMessage to itself.
+      content.document.getElementById("button").click();
+    });
+  });
+
+  BrowserTestUtils.removeTab(tab);
+  BrowserTestUtils.removeTab(senderTab);
+}
+
+add_task(async function runTests() {
+  for (let useDifferentFPD of [true, false]) {
+    for (let useStarTargetOrigin of [true, false]) {
+      for (let enableBlocking of [true, false]) {
+        if (enableBlocking) {
+          await SpecialPowers.pushPrefEnv({
+            set: [["privacy.firstparty.isolate.block_post_message", true]],
+          });
+        }
+
+        await runTestWithOptions(
+          useDifferentFPD,
+          useStarTargetOrigin,
+          enableBlocking
+        );
+
+        if (enableBlocking) {
+          await SpecialPowers.popPrefEnv();
+        }
+      }
+    }
+  }
+});
diff --git a/browser/components/originattributes/test/browser/browser_sanitize.js b/browser/components/originattributes/test/browser/browser_sanitize.js
new file mode 100644
index 0000000000..61d236f249
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_sanitize.js
@@ -0,0 +1,92 @@
+/**
+ * Bug 1270338 - Add a mochitest to ensure Sanitizer clears data for all containers
+ */
+
+if (SpecialPowers.useRemoteSubframes) {
+  requestLongerTimeout(4);
+}
+
+const CC = Components.Constructor;
+
+const TEST_DOMAIN = "https://example.net/";
+
+async function setCookies(aBrowser) {
+  await SpecialPowers.spawn(aBrowser, [], function () {
+    content.document.cookie = "key=value";
+  });
+}
+
+function cacheDataForContext(loadContextInfo) {
+  return new Promise(resolve => {
+    let cachedURIs = [];
+    let cacheVisitor = {
+      onCacheStorageInfo(num, consumption) {},
+      onCacheEntryInfo(uri, idEnhance) {
+        cachedURIs.push(uri.asciiSpec);
+      },
+      onCacheEntryVisitCompleted() {
+        resolve(cachedURIs);
+      },
+      QueryInterface: ChromeUtils.generateQI(["nsICacheStorageVisitor"]),
+    };
+    // Visiting the disk cache also visits memory storage so we do not
+    // need to use Services.cache2.memoryCacheStorage() here.
+    let storage = Services.cache2.diskCacheStorage(loadContextInfo);
+    storage.asyncVisitStorage(cacheVisitor, true);
+  });
+}
+
+async function checkCookiesSanitized(aBrowser) {
+  await SpecialPowers.spawn(aBrowser, [], function () {
+    Assert.equal(
+      content.document.cookie,
+      "",
+      "Cookies of all origin attributes should be cleared."
+    );
+  });
+}
+
+function checkCacheExists(aShouldExist) {
+  return async function () {
+    let loadContextInfos = [
+      Services.loadContextInfo.default,
+      Services.loadContextInfo.custom(false, { userContextId: 1 }),
+      Services.loadContextInfo.custom(false, { userContextId: 2 }),
+      Services.loadContextInfo.custom(false, {
+        firstPartyDomain: "example.com",
+      }),
+      Services.loadContextInfo.custom(false, {
+        firstPartyDomain: "example.org",
+      }),
+    ];
+    let i = 0;
+    for (let loadContextInfo of loadContextInfos) {
+      let cacheURIs = await cacheDataForContext(loadContextInfo);
+      is(
+        cacheURIs.includes(TEST_DOMAIN),
+        aShouldExist,
+        TEST_DOMAIN +
+          " should " +
+          (aShouldExist ? "not " : "") +
+          "be cached for all origin attributes." +
+          i++
+      );
+    }
+  };
+}
+
+add_setup(async function () {
+  Services.cache2.clear();
+});
+
+// This will set the cookies and the cache.
+IsolationTestTools.runTests(TEST_DOMAIN, setCookies, () => true);
+
+add_task(checkCacheExists(true));
+
+add_task(async function sanitize() {
+  await Sanitizer.sanitize(["cookies", "cache"]);
+});
+
+add_task(checkCacheExists(false));
+IsolationTestTools.runTests(TEST_DOMAIN, checkCookiesSanitized, () => true);
diff --git a/browser/components/originattributes/test/browser/browser_sharedworker.js b/browser/components/originattributes/test/browser/browser_sharedworker.js
new file mode 100644
index 0000000000..5fd7f180ee
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_sharedworker.js
@@ -0,0 +1,30 @@
+/**
+ * Bug 1264593 - A test case for the shared worker by first party isolation.
+ */
+
+const TEST_DOMAIN = "https://example.net/";
+const TEST_PATH =
+  TEST_DOMAIN + "browser/browser/components/originattributes/test/browser/";
+const TEST_PAGE = TEST_PATH + "file_sharedworker.html";
+
+async function getResultFromSharedworker(aBrowser) {
+  let response = await SpecialPowers.spawn(aBrowser, [], async function () {
+    let worker = new content.SharedWorker(
+      "file_shared.worker.js",
+      "isolationSharedWorkerTest"
+    );
+
+    let result = await new content.Promise(resolve => {
+      worker.port.onmessage = function (e) {
+        content.document.getElementById("display").innerHTML = e.data;
+        resolve(e.data);
+      };
+    });
+
+    return result;
+  });
+
+  return response;
+}
+
+IsolationTestTools.runTests(TEST_PAGE, getResultFromSharedworker);
diff --git a/browser/components/originattributes/test/browser/browser_windowOpenerRestriction.js b/browser/components/originattributes/test/browser/browser_windowOpenerRestriction.js
new file mode 100644
index 0000000000..0822ba24c9
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_windowOpenerRestriction.js
@@ -0,0 +1,113 @@
+/**
+ * Bug 1339336 - A test case for testing pref 'privacy.firstparty.isolate.restrict_opener_access'
+ */
+
+const CC = Components.Constructor;
+
+const FIRST_PARTY_OPENER = "example.com";
+const FIRST_PARTY_TARGET = "example.org";
+const OPENER_PAGE =
+  "https://" +
+  FIRST_PARTY_OPENER +
+  "/browser/browser/components/" +
+  "originattributes/test/browser/file_windowOpenerRestriction.html";
+const TARGET_PAGE =
+  "https://" +
+  FIRST_PARTY_TARGET +
+  "/browser/browser/components/" +
+  "originattributes/test/browser/file_windowOpenerRestrictionTarget.html";
+
+async function testPref(aIsPrefEnabled) {
+  // Use a random key so we don't access it in later tests.
+  let cookieStr =
+    "key" + Math.random().toString() + "=" + Math.random().toString();
+
+  // Open the tab for the opener page.
+  let tab = BrowserTestUtils.addTab(gBrowser, OPENER_PAGE);
+
+  // Select this tab and make sure its browser is loaded and focused.
+  gBrowser.selectedTab = tab;
+  tab.ownerGlobal.focus();
+
+  let browser = gBrowser.getBrowserForTab(tab);
+  await BrowserTestUtils.browserLoaded(browser);
+
+  await SpecialPowers.spawn(
+    browser,
+    [{ cookieStr, page: TARGET_PAGE, isPrefEnabled: aIsPrefEnabled }],
+    async function (obj) {
+      // Acquire the iframe element.
+      let childFrame = content.document.getElementById("child");
+
+      // Insert a cookie into this iframe.
+      await SpecialPowers.spawn(childFrame, [obj.cookieStr], aCookieStr => {
+        content.document.cookie = aCookieStr + "; SameSite=None; Secure;";
+      });
+
+      // Open the tab here and focus on it.
+      let openedPath = obj.page;
+      if (!obj.isPrefEnabled) {
+        // If the pref is not enabled, we pass the cookie value through the query string
+        // to tell the target page that it should check the cookie value.
+        openedPath += "?" + obj.cookieStr;
+      }
+
+      // Issue the opener page to open the target page and focus on it.
+      content.openedWindow = content.open(openedPath);
+      content.openedWindow.focus();
+    }
+  );
+
+  // Wait until the target page is loaded.
+  let targetBrowser = gBrowser.getBrowserForTab(gBrowser.selectedTab);
+  await BrowserTestUtils.browserLoaded(targetBrowser);
+
+  // The target page will do the check and show the result through its title.
+  is(
+    targetBrowser.contentTitle,
+    "pass",
+    "The behavior of window.opener is correct."
+  );
+
+  // Close Tabs.
+  await SpecialPowers.spawn(browser, [], async function () {
+    content.openedWindow.close();
+  });
+  BrowserTestUtils.removeTab(tab);
+
+  // Reset cookies
+  Services.cookies.removeAll();
+}
+
+add_task(async function runTests() {
+  let tests = [true, false];
+
+  // First, we test the scenario that the first party isolation is enabled.
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.firstparty.isolate", true]],
+  });
+
+  for (let enabled of tests) {
+    await SpecialPowers.pushPrefEnv({
+      set: [["privacy.firstparty.isolate.restrict_opener_access", enabled]],
+    });
+
+    await testPref(enabled);
+  }
+
+  // Second, we test the scenario that the first party isolation is disabled.
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.firstparty.isolate", false]],
+  });
+
+  for (let enabled of tests) {
+    await SpecialPowers.pushPrefEnv({
+      set: [["privacy.firstparty.isolate.restrict_opener_access", enabled]],
+    });
+
+    // When first party isolation is disabled, this pref will not affect the behavior of
+    // window.opener. And the correct behavior here is to allow access since the iframe in
+    // the opener page has the same origin with the target page.
+    await testPref(false);
+  }
+});
diff --git a/browser/components/originattributes/test/browser/dummy.html b/browser/components/originattributes/test/browser/dummy.html
new file mode 100644
index 0000000000..1a87e28408
--- /dev/null
+++ b/browser/components/originattributes/test/browser/dummy.html
@@ -0,0 +1,9 @@
+<html>
+<head>
+<title>Dummy test page</title>
+<meta http-equiv="Content-Type" content="text/html;charset=utf-8"></meta>
+</head>
+<body>
+<p>Dummy test page</p>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_broadcastChannel.html b/browser/components/originattributes/test/browser/file_broadcastChannel.html
new file mode 100644
index 0000000000..deb4a154ea
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_broadcastChannel.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=utf-8">
+  <title>Page broadcast channel creator for first party isolation</title>
+</head>
+<body>
+  <div id="display" style="white-space:pre; font-family:monospace; display:inline;"></div>
+  <iframe id="iframe" src="file_broadcastChanneliFrame.html"></iframe>>
+<script type="text/javascript">
+let bc = new BroadcastChannel("testBroadcastChannel");
+bc.onmessage = function(e) {
+  document.getElementById("display").innerHTML = e.data;
+};
+</script>
+</body>
diff --git a/browser/components/originattributes/test/browser/file_broadcastChanneliFrame.html b/browser/components/originattributes/test/browser/file_broadcastChanneliFrame.html
new file mode 100644
index 0000000000..6f4c484bc9
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_broadcastChanneliFrame.html
@@ -0,0 +1,15 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=utf-8">
+  <title>Page broadcast channel responder for first party isolation</title>
+</head>
+<body>
+  <div id="display" style="white-space:pre; font-family:monospace; display:inline;"></div>
+<script type="text/javascript">
+let bc = new BroadcastChannel("testBroadcastChannel");
+bc.onmessage = function(e) {
+  window.parent.postMessage(e.data, "*");
+};
+</script>
+</body>
diff --git a/browser/components/originattributes/test/browser/file_cache.html b/browser/components/originattributes/test/browser/file_cache.html
new file mode 100644
index 0000000000..24e09baefa
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_cache.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html>
+<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+<head>
+  <link rel="icon" type="image/png" href="http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.favicon.png">
+  <link rel="stylesheet" type="text/css"
+        href="http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.link.css">
+  <link rel="preconnect" href="http://example.net">
+  <style type="text/css">
+    @font-face {
+      font-family: foo;
+      src: url("http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.font.woff") format('woff');
+    }
+    body { font-family: foo }
+  </style>
+</head>
+<body>
+<div>file_cache.html</div>
+
+<iframe src="http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.iframe.html">
+</iframe>
+
+<script src="http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.script.js">
+</script>
+
+<img src="http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.img.png">
+
+<embed src="http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.embed.png">
+
+<object data="http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.object.png"
+        type="image/png"></object>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_favicon.html b/browser/components/originattributes/test/browser/file_favicon.html
new file mode 100644
index 0000000000..f294b47758
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_favicon.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <meta charset='utf-8'>
+    <title>Favicon Test for originAttributes</title>
+    <link rel="icon" type="image/png" href="file_favicon.png" />
+  </head>
+  <body>
+    Favicon!!
+  </body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_favicon.png b/browser/components/originattributes/test/browser/file_favicon.png
new file mode 100644
index 0000000000..5535363c94
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_favicon.png
diff --git a/browser/components/originattributes/test/browser/file_favicon.png^headers^ b/browser/components/originattributes/test/browser/file_favicon.png^headers^
new file mode 100644
index 0000000000..9e23c73b7f
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_favicon.png^headers^
@@ -0,0 +1 @@
+Cache-Control: no-cache
diff --git a/browser/components/originattributes/test/browser/file_favicon_cache.html b/browser/components/originattributes/test/browser/file_favicon_cache.html
new file mode 100644
index 0000000000..9e3e0114a1
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_favicon_cache.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <meta charset='utf-8'>
+    <title>Favicon Test for originAttributes</title>
+    <link rel="icon" type="image/png" href="https://example.net/browser/browser/components/originattributes/test/browser/file_favicon_cache.png" />
+  </head>
+  <body>
+    Third Party Favicon!!
+  </body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_favicon_cache.png b/browser/components/originattributes/test/browser/file_favicon_cache.png
new file mode 100644
index 0000000000..5535363c94
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_favicon_cache.png
diff --git a/browser/components/originattributes/test/browser/file_favicon_thirdParty.html b/browser/components/originattributes/test/browser/file_favicon_thirdParty.html
new file mode 100644
index 0000000000..e50b0c3493
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_favicon_thirdParty.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <meta charset='utf-8'>
+    <title>Favicon Test for originAttributes</title>
+    <link rel="icon" type="image/png" href="https://example.net/browser/browser/components/originattributes/test/browser/file_favicon.png" />
+  </head>
+  <body>
+    Third Party Favicon!!
+  </body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_firstPartyBasic.html b/browser/components/originattributes/test/browser/file_firstPartyBasic.html
new file mode 100644
index 0000000000..713187fb2c
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_firstPartyBasic.html
@@ -0,0 +1,8 @@
+<html>
+  <head>
+    <meta charset="UTF-8">
+    <title>First Party Isolation Tests</title>
+  </head>
+  <body>
+  </body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_postMessage.html b/browser/components/originattributes/test/browser/file_postMessage.html
new file mode 100644
index 0000000000..91255d0364
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_postMessage.html
@@ -0,0 +1,27 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=utf-8">
+  <title>Test page for window.postMessage</title>
+</head>
+<body>
+  <div id="display" style="white-space:pre; font-family:monospace; display:inline;"></div>
+  <input type="button" id="button" title="button"/>
+  <script>
+
+  const TEST_PATH = "http://example.org/browser/browser/components/originattributes/test/browser/file_postMessageSender.html";
+
+  window.onload = () => {
+    window.addEventListener("message", aEvent => {
+      if (aEvent.data === "Message") {
+        document.getElementById("display").innerHTML = "Message";
+      }
+    });
+
+    document.getElementById("button").onclick = () => {
+      window.postMessage("Self", "/");
+    };
+  };
+  </script>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_postMessageSender.html b/browser/components/originattributes/test/browser/file_postMessageSender.html
new file mode 100644
index 0000000000..ebdffb990f
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_postMessageSender.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=utf-8">
+  <title>Test page for always sending a message to its opener through postMessage</title>
+</head>
+<body>
+  <script>
+  window.onload = () => {
+    // The target origin is coming from the query string.
+    let targetOrigin = window.location.search.substring(1);
+    window.opener.postMessage("Message", targetOrigin);
+  };
+  </script>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_saveAs.sjs b/browser/components/originattributes/test/browser/file_saveAs.sjs
new file mode 100644
index 0000000000..9b16250c76
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_saveAs.sjs
@@ -0,0 +1,38 @@
+const HTTP_ORIGIN = "http://example.com";
+const SECOND_ORIGIN = "http://example.org";
+const URI_PATH = "/browser/browser/components/originattributes/test/browser/";
+const LINK_PATH = `${URI_PATH}file_saveAs.sjs`;
+// Reusing existing ogv file for testing.
+const VIDEO_PATH = `${URI_PATH}file_thirdPartyChild.video.ogv`;
+// Reusing existing png file for testing.
+const IMAGE_PATH = `${URI_PATH}file_favicon.png`;
+const FRAME_PATH = `${SECOND_ORIGIN}${URI_PATH}file_saveAs.sjs?image=1`;
+
+function handleRequest(aRequest, aResponse) {
+  var params = new URLSearchParams(aRequest.queryString);
+  aResponse.setStatusLine(aRequest.httpVersion, 200);
+  aResponse.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
+  let contentBody = "";
+
+  if (params.has("link")) {
+    contentBody = `<a href="${LINK_PATH}" id="link1">this is a link</a>`;
+  } else if (params.has("video")) {
+    contentBody = `<video src="${VIDEO_PATH}" id="video1"> </video>`;
+  } else if (params.has("image")) {
+    contentBody = `<img src="${IMAGE_PATH}" id="image1">`;
+  } else if (params.has("page")) {
+    // We need at least one resource, like a img, a link or a script, to trigger
+    // downloading resources in "Save Page As". Otherwise, it will output the
+    // document directly without any network request.
+    contentBody = `<img src="${IMAGE_PATH}">`;
+  } else if (params.has("frame")) {
+    // Like "Save Page As", we need to put at least one resource in the frame.
+    // Here we also use a image.
+    contentBody = `<iframe src="${FRAME_PATH}" id="frame1"></iframe>`;
+  } else if (params.has("pageinfo")) {
+    contentBody = `<img src="${IMAGE_PATH}" id="image1">
+                   <video src="${VIDEO_PATH}" id="video1"> </video>`;
+  }
+
+  aResponse.write(`<html><body>${contentBody}</body></html>`);
+}
diff --git a/browser/components/originattributes/test/browser/file_shared.worker.js b/browser/components/originattributes/test/browser/file_shared.worker.js
new file mode 100644
index 0000000000..e5f0b35946
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_shared.worker.js
@@ -0,0 +1,7 @@
+self.randomValue = Math.random();
+
+onconnect = function (e) {
+  let port = e.ports[0];
+  port.postMessage(self.randomValue);
+  port.start();
+};
diff --git a/browser/components/originattributes/test/browser/file_sharedworker.html b/browser/components/originattributes/test/browser/file_sharedworker.html
new file mode 100644
index 0000000000..b9ff793bd5
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_sharedworker.html
@@ -0,0 +1,10 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=utf-8">
+  <title>Page SharedWorker creator for first party isolation</title>
+</head>
+<body>
+<div id="display" style="white-space:pre; font-family:monospace; display:inline;"></div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.audio.ogg b/browser/components/originattributes/test/browser/file_thirdPartyChild.audio.ogg
new file mode 100644
index 0000000000..edda4e9128
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.audio.ogg
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.embed.png b/browser/components/originattributes/test/browser/file_thirdPartyChild.embed.png
new file mode 100644
index 0000000000..c5916f2897
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.embed.png
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.favicon.png b/browser/components/originattributes/test/browser/file_thirdPartyChild.favicon.png
new file mode 100644
index 0000000000..c5916f2897
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.favicon.png
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.fetch.html b/browser/components/originattributes/test/browser/file_thirdPartyChild.fetch.html
new file mode 100644
index 0000000000..037901ad06
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.fetch.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+<!-- The child page, used by browser_cache.js -->
+<body>
+<div>thirdPartyChild.fetch.html</div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.font.woff b/browser/components/originattributes/test/browser/file_thirdPartyChild.font.woff
new file mode 100644
index 0000000000..acda4f3d9f
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.font.woff
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.iframe.html b/browser/components/originattributes/test/browser/file_thirdPartyChild.iframe.html
new file mode 100644
index 0000000000..b047d5b412
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.iframe.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+<!-- The child page, used by browser_cache.js -->
+<body>
+<div>thirdPartyChild.html</div>
+<script>
+  var xhr = new XMLHttpRequest();
+  xhr.open("GET", "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.xhr.html", true);
+  xhr.send();
+  var worker = new Worker("http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.js");
+  var sharedWorker = new SharedWorker("http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.sharedworker.js");
+
+  fetch("file_thirdPartyChild.fetch.html", {cache: "force-cache"} );
+  fetch(new Request("file_thirdPartyChild.request.html"), {cache: "force-cache"} );
+</script>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.img.png b/browser/components/originattributes/test/browser/file_thirdPartyChild.img.png
new file mode 100644
index 0000000000..c5916f2897
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.img.png
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.import.js b/browser/components/originattributes/test/browser/file_thirdPartyChild.import.js
new file mode 100644
index 0000000000..dbf8f83769
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.import.js
@@ -0,0 +1 @@
+// dummy script, to be called by self.importScripts(...)
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.link.css b/browser/components/originattributes/test/browser/file_thirdPartyChild.link.css
new file mode 100644
index 0000000000..6f8f41b4a4
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.link.css
@@ -0,0 +1 @@
+/* Dummy CSS file, used by browser_cache.js. */
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.object.png b/browser/components/originattributes/test/browser/file_thirdPartyChild.object.png
new file mode 100644
index 0000000000..c5916f2897
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.object.png
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.request.html b/browser/components/originattributes/test/browser/file_thirdPartyChild.request.html
new file mode 100644
index 0000000000..108ed2ffa5
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.request.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+<!-- The child page, used by browser_cache.js -->
+<body>
+<div>thirdPartyChild.request.html</div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.script.js b/browser/components/originattributes/test/browser/file_thirdPartyChild.script.js
new file mode 100644
index 0000000000..6ddf436c09
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.script.js
@@ -0,0 +1 @@
+// Dummy child script, used by browser_cache.js
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.sharedworker.js b/browser/components/originattributes/test/browser/file_thirdPartyChild.sharedworker.js
new file mode 100644
index 0000000000..b262fa10a3
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.sharedworker.js
@@ -0,0 +1 @@
+// dummy file
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.track.vtt b/browser/components/originattributes/test/browser/file_thirdPartyChild.track.vtt
new file mode 100644
index 0000000000..b37cb40e45
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.track.vtt
@@ -0,0 +1,13 @@
+WEBVTT FILE
+
+1
+00:00:00.500 --> 00:00:02.000 D:vertical A:start
+blah blah blah
+
+2
+00:00:02.500 --> 00:00:04.300
+this is a test
+
+3
+00:00:05.000 --> 00:00:07.000
+one more line
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.video.ogv b/browser/components/originattributes/test/browser/file_thirdPartyChild.video.ogv
new file mode 100644
index 0000000000..68dee3cf2b
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.video.ogv
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.fetch.html b/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.fetch.html
new file mode 100644
index 0000000000..47e42d1e58
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.fetch.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+<!-- The child page, used by browser_cache.js -->
+<body>
+<div>thirdPartyChild.worker.fetch.html</div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.js b/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.js
new file mode 100644
index 0000000000..38aff85c30
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.js
@@ -0,0 +1,20 @@
+var xhr = new XMLHttpRequest();
+xhr.open(
+  "GET",
+  "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.xhr.html",
+  true
+);
+xhr.send();
+
+fetch(
+  "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.fetch.html",
+  { cache: "force-cache" }
+);
+var myRequest = new Request(
+  "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.request.html"
+);
+fetch(myRequest, { cache: "force-cache" });
+
+self.importScripts(
+  "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.import.js"
+);
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.request.html b/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.request.html
new file mode 100644
index 0000000000..5b5c55bfeb
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.request.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+<!-- The child page, used by browser_cache.js -->
+<body>
+<div>thirdPartyChild.worker.request.html</div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.xhr.html b/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.xhr.html
new file mode 100644
index 0000000000..9fc107f375
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.xhr.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+<!-- The child page, used by browser_cache.js -->
+<body>
+<div>thirdPartyChild.worker.xhr.html</div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_thirdPartyChild.xhr.html b/browser/components/originattributes/test/browser/file_thirdPartyChild.xhr.html
new file mode 100644
index 0000000000..f56e7b3c1f
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_thirdPartyChild.xhr.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
+<!-- The child page, used by browser_cache.js -->
+<body>
+<div>thirdPartyChild.html</div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_windowOpenerRestriction.html b/browser/components/originattributes/test/browser/file_windowOpenerRestriction.html
new file mode 100644
index 0000000000..8925a6ccf5
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_windowOpenerRestriction.html
@@ -0,0 +1,10 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=utf-8">
+  <title>Test page for window.opener accessibility</title>
+</head>
+<body>
+  <iframe id="child" name="child" src="https://example.org/browser/browser/components/originattributes/test/browser/file_firstPartyBasic.html"></iframe>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/file_windowOpenerRestrictionTarget.html b/browser/components/originattributes/test/browser/file_windowOpenerRestrictionTarget.html
new file mode 100644
index 0000000000..5a14834897
--- /dev/null
+++ b/browser/components/originattributes/test/browser/file_windowOpenerRestrictionTarget.html
@@ -0,0 +1,33 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta http-equiv="content-type" content="text/html; charset=utf-8">
+  <title>title not set</title>
+  <script>
+    // If the query string is given, we are expecting the window.opener can be accessed
+    // across different first party domains, so we will match the cookie value.
+    // Otherwise, the access of window.opener should be treated as cross-origin.
+    // Therefore, it should fail at this setting.
+    let openerRestriction = true;
+    let cookieValue;
+    if (window.location.search.length) {
+      cookieValue = window.location.search.substr(1);
+      openerRestriction = false;
+    }
+
+    try {
+      let openerFrame = window.opener.frames.child;
+      let result = openerFrame.document.cookie === cookieValue;
+      if (result && !openerRestriction) {
+        document.title = "pass";
+      }
+    } catch (e) {
+      if (openerRestriction) {
+        document.title = "pass";
+      }
+    }
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/head.js b/browser/components/originattributes/test/browser/head.js
new file mode 100644
index 0000000000..bd4307fd1c
--- /dev/null
+++ b/browser/components/originattributes/test/browser/head.js
@@ -0,0 +1,463 @@
+/* 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/. */
+
+"use strict";
+
+const TEST_URL_PATH =
+  "/browser/browser/components/originattributes/test/browser/";
+
+// The flags of test modes.
+const TEST_MODE_FIRSTPARTY = 0;
+const TEST_MODE_NO_ISOLATION = 1;
+const TEST_MODE_CONTAINERS = 2;
+
+// The name of each mode.
+const TEST_MODE_NAMES = ["first party isolation", "no isolation", "containers"];
+
+// The frame types.
+const TEST_TYPE_FRAME = 1;
+const TEST_TYPE_IFRAME = 2;
+
+// The default frame setting.
+const DEFAULT_FRAME_SETTING = [TEST_TYPE_IFRAME];
+
+let gFirstPartyBasicPage = TEST_URL_PATH + "file_firstPartyBasic.html";
+
+/**
+ * Add a tab for the given url with the specific user context id.
+ *
+ * @param aURL
+ *    The url of the page.
+ * @param aUserContextId
+ *    The user context id for this tab.
+ *
+ * @return tab     - The tab object of this tab.
+ *         browser - The browser object of this tab.
+ */
+async function openTabInUserContext(aURL, aUserContextId) {
+  info(`Start to open tab in specific userContextID: ${aUserContextId}.`);
+  let originAttributes = {
+    userContextId: aUserContextId,
+  };
+  info("Create triggeringPrincipal.");
+  let triggeringPrincipal =
+    Services.scriptSecurityManager.createContentPrincipal(
+      makeURI(aURL),
+      originAttributes
+    );
+  // Open the tab in the correct userContextId.
+  info("Open the tab and wait for it to be loaded.");
+  let tab = BrowserTestUtils.addTab(gBrowser, aURL, {
+    userContextId: aUserContextId,
+    triggeringPrincipal,
+  });
+
+  // Select tab and make sure its browser is focused.
+  gBrowser.selectedTab = tab;
+  tab.ownerGlobal.focus();
+
+  let browser = gBrowser.getBrowserForTab(tab);
+  await BrowserTestUtils.browserLoaded(browser);
+  info("Finished tab opening.");
+
+  return { tab, browser };
+}
+
+/**
+ * Add a tab for a page with the given first party domain. This page will have
+ * an iframe which is loaded with the given url by default or you could specify
+ * a frame setting to create nested frames. And this function will also modify
+ * the 'content' in the ContentTask to the target frame's window object.
+ *
+ * @param aURL
+ *    The url of the iframe.
+ * @param aFirstPartyDomain
+ *    The first party domain.
+ * @param aFrameSetting
+ *    This setting controls how frames are organized within the page. The
+ *    setting is an array of frame types, the first item indicates the
+ *    frame type (iframe or frame) of the first layer of the frame structure,
+ *    and the second item indicates the second layer, and so on. The aURL will
+ *    be loaded at the deepest layer. This is optional.
+ *
+ * @return tab     - The tab object of this tab.
+ *         browser - The browser object of this tab.
+ */
+async function openTabInFirstParty(
+  aURL,
+  aFirstPartyDomain,
+  aFrameSetting = DEFAULT_FRAME_SETTING
+) {
+  info(`Start to open tab under first party domain "${aFirstPartyDomain}".`);
+  // If the first party domain ends with '/', we remove it.
+  if (aFirstPartyDomain.endsWith("/")) {
+    aFirstPartyDomain = aFirstPartyDomain.slice(0, -1);
+  }
+
+  let basicPageURL = aFirstPartyDomain + gFirstPartyBasicPage;
+
+  // Open the tab for the basic first party page.
+  info("Open the tab and then wait for it to be loaded.");
+  let tab = BrowserTestUtils.addTab(gBrowser, basicPageURL);
+
+  // Select tab and make sure its browser is focused.
+  gBrowser.selectedTab = tab;
+  tab.ownerGlobal.focus();
+
+  let browser = gBrowser.getBrowserForTab(tab);
+  await BrowserTestUtils.browserLoaded(browser);
+
+  // Clone the frame setting here since we will modify it later.
+  let frameSetting = aFrameSetting.slice(0);
+  let frameType;
+  let targetBrowsingContext;
+
+  // Create the frame structure.
+  info("Create the frame structure.");
+  while ((frameType = frameSetting.shift())) {
+    if (!targetBrowsingContext) {
+      targetBrowsingContext = browser;
+    }
+
+    let frameURL = !frameSetting.length ? aURL : basicPageURL;
+
+    if (frameType == TEST_TYPE_FRAME) {
+      info("Add the frameset.");
+      targetBrowsingContext = await SpecialPowers.spawn(
+        targetBrowsingContext,
+        [frameURL],
+        async function (aFrameURL) {
+          // Add a frameset which carries the frame element.
+          let frameSet = content.document.createElement("frameset");
+          frameSet.cols = "50%,50%";
+
+          let frame = content.document.createElement("frame");
+          let dummyFrame = content.document.createElement("frame");
+
+          frameSet.appendChild(frame);
+          frameSet.appendChild(dummyFrame);
+
+          content.document.body.appendChild(frameSet);
+
+          // Wait for the frame to be loaded.
+          await new Promise(done => {
+            frame.addEventListener(
+              "load",
+              function () {
+                done();
+              },
+              { capture: true, once: true }
+            );
+
+            frame.setAttribute("src", aFrameURL);
+          });
+
+          return frame.browsingContext;
+        }
+      );
+    } else if (frameType == TEST_TYPE_IFRAME) {
+      info("Add the iframe.");
+      targetBrowsingContext = await SpecialPowers.spawn(
+        targetBrowsingContext,
+        [frameURL],
+        async function (aFrameURL) {
+          // Add an iframe.
+          let frame = content.document.createElement("iframe");
+          content.document.body.appendChild(frame);
+
+          // Wait for the frame to be loaded.
+          await new Promise(done => {
+            frame.addEventListener(
+              "load",
+              function () {
+                done();
+              },
+              { capture: true, once: true }
+            );
+
+            frame.setAttribute("src", aFrameURL);
+          });
+
+          return frame.browsingContext;
+        }
+      );
+    } else {
+      ok(false, "Invalid frame type.");
+      break;
+    }
+    info("Successfully added a frame");
+  }
+  info("Finished the frame structure");
+
+  return { tab, browser: targetBrowsingContext };
+}
+
+this.IsolationTestTools = {
+  /**
+   * Adds isolation tests for first party isolation, no isolation
+   * and containers respectively.
+   *
+   * @param aTask
+   *    The testing task which will be run in different settings.
+   */
+  _add_task(aTask) {
+    let testSettings = [
+      {
+        mode: TEST_MODE_FIRSTPARTY,
+        skip: false,
+        prefs: [["privacy.firstparty.isolate", true]],
+      },
+      {
+        mode: TEST_MODE_NO_ISOLATION,
+        skip: false,
+        prefs: [["privacy.firstparty.isolate", false]],
+      },
+      {
+        mode: TEST_MODE_CONTAINERS,
+        skip: false,
+        prefs: [["privacy.userContext.enabled", true]],
+      },
+    ];
+
+    // Add test tasks.
+    for (let testSetting of testSettings) {
+      IsolationTestTools._addTaskForMode(
+        testSetting.mode,
+        testSetting.prefs,
+        testSetting.skip,
+        aTask
+      );
+    }
+  },
+
+  _addTaskForMode(aMode, aPref, aSkip, aTask) {
+    if (aSkip) {
+      return;
+    }
+
+    add_task(async function () {
+      info(`Starting the test for ${TEST_MODE_NAMES[aMode]}.`);
+
+      // Before run this task, reset the preferences first.
+      await SpecialPowers.flushPrefEnv();
+
+      // Make sure preferences are set properly.
+      await SpecialPowers.pushPrefEnv({ set: aPref });
+
+      await SpecialPowers.pushPrefEnv({ set: [["dom.ipc.processCount", 1]] });
+      await SpecialPowers.pushPrefEnv({
+        set: [
+          [
+            "network.auth.non-web-content-triggered-resources-http-auth-allow",
+            true,
+          ],
+        ],
+      });
+
+      await aTask(aMode);
+    });
+  },
+
+  /**
+   * Add a tab with the given tab setting, this will open different types of
+   * tabs according to the given test mode. A tab setting means a isolation
+   * target in different test mode; a tab setting indicates a first party
+   * domain when testing the first party isolation, it is a user context
+   * id when testing containers.
+   *
+   * @param aMode
+   *    The test mode which decides what type of tabs will be opened.
+   * @param aURL
+   *    The url which is going to open.
+   * @param aTabSettingObj
+   *    The tab setting object includes 'firstPartyDomain' for the first party
+   *    domain and 'userContextId' for Containers.
+   * @param aFrameSetting
+   *    This setting controls how frames are organized within the page. The
+   *    setting is an array of frame types, the first item indicates the
+   *    frame type (iframe or frame) of the first layer of the frame structure,
+   *    and the second item indicates the second layer, and so on. The aURL
+   *    will be loaded at the deepest layer. This is optional.
+   *
+   * @return tab     - The tab object of this tab.
+   *         browser - The browser object of this tab.
+   */
+  _addTab(aMode, aURL, aTabSettingObj, aFrameSetting) {
+    if (aMode === TEST_MODE_CONTAINERS) {
+      return openTabInUserContext(aURL, aTabSettingObj.userContextId);
+    }
+
+    return openTabInFirstParty(
+      aURL,
+      aTabSettingObj.firstPartyDomain,
+      aFrameSetting
+    );
+  },
+
+  /**
+   * Run isolation tests. The framework will run tests with standard combinations
+   * of prefs and tab settings, and checks whether the isolation is working.
+   *
+   * @param aURL
+   *    The URL of the page that will be tested or an object contains 'url',
+   *    the tested page, 'firstFrameSetting' for the frame setting of the first
+   *    tab, and 'secondFrameSetting' for the second tab.
+   * @param aGetResultFuncs
+   *    An array of functions or a single function which are responsible for
+   *    returning the isolation result back to the framework for further checking.
+   *    Each of these functions will be provided the browser object of the tab,
+   *    that allows modifying or fetchings results from the page content.
+   * @param aCompareResultFunc
+   *    An optional function which allows modifying the way how does framework
+   *    check results. This function will be provided a boolean to indicate
+   *    the isolation is no or off and two results. This function should return
+   *    a boolean to tell that whether isolation is working. If this function
+   *    is not given, the framework will take case checking by itself.
+   * @param aBeforeFunc
+   *    An optional function which is called before any tabs are created so
+   *    that the test case can set up/reset local state.
+   * @param aGetResultImmediately
+   *    An optional boolean to ensure we get results before the next tab is opened.
+   */
+  runTests(
+    aURL,
+    aGetResultFuncs,
+    aCompareResultFunc,
+    aBeforeFunc,
+    aGetResultImmediately,
+    aUseHttps
+  ) {
+    let pageURL;
+    let firstFrameSetting;
+    let secondFrameSetting;
+
+    // Request a longer timeout since the test will run a test for three times
+    // with different settings. Thus, one test here represents three tests.
+    // For this reason, we triple the timeout.
+    requestLongerTimeout(3);
+
+    if (typeof aURL === "string") {
+      pageURL = aURL;
+    } else if (typeof aURL === "object") {
+      pageURL = aURL.url;
+      firstFrameSetting = aURL.firstFrameSetting;
+      secondFrameSetting = aURL.secondFrameSetting;
+    }
+
+    if (!Array.isArray(aGetResultFuncs)) {
+      aGetResultFuncs = [aGetResultFuncs];
+    }
+
+    let tabSettings = aUseHttps
+      ? [
+          { firstPartyDomain: "https://example.com", userContextId: 1 },
+          { firstPartyDomain: "https://example.org", userContextId: 2 },
+        ]
+      : [
+          { firstPartyDomain: "http://example.com", userContextId: 1 },
+          { firstPartyDomain: "http://example.org", userContextId: 2 },
+        ];
+
+    this._add_task(async function (aMode) {
+      let tabSettingA = 0;
+
+      for (let tabSettingB of [0, 1]) {
+        // Give the test a chance to set up before each case is run.
+        if (aBeforeFunc) {
+          try {
+            await aBeforeFunc(aMode);
+          } catch (e) {
+            ok(false, `Caught error while doing testing setup: ${e}.`);
+          }
+        }
+        // Create Tabs.
+        info(`Create tab A for ${TEST_MODE_NAMES[aMode]} test.`);
+        let tabInfoA = await IsolationTestTools._addTab(
+          aMode,
+          pageURL,
+          tabSettings[tabSettingA],
+          firstFrameSetting
+        );
+        info(`Finished Create tab A for ${TEST_MODE_NAMES[aMode]} test.`);
+        let resultsA = [];
+        if (aGetResultImmediately) {
+          try {
+            info(
+              `Immediately get result from tab A for ${TEST_MODE_NAMES[aMode]} test`
+            );
+            for (let getResultFunc of aGetResultFuncs) {
+              resultsA.push(await getResultFunc(tabInfoA.browser));
+            }
+          } catch (e) {
+            ok(false, `Caught error while getting result from Tab A: ${e}.`);
+          }
+        }
+        info(`Create tab B for ${TEST_MODE_NAMES[aMode]}.`);
+        let tabInfoB = await IsolationTestTools._addTab(
+          aMode,
+          pageURL,
+          tabSettings[tabSettingB],
+          secondFrameSetting
+        );
+        info(`Finished Create tab B for ${TEST_MODE_NAMES[aMode]} test.`);
+        let i = 0;
+        for (let getResultFunc of aGetResultFuncs) {
+          // Fetch results from tabs.
+          info(`Fetching result from tab A for ${TEST_MODE_NAMES[aMode]}.`);
+          let resultA;
+          try {
+            resultA = aGetResultImmediately
+              ? resultsA[i++]
+              : await getResultFunc(tabInfoA.browser);
+          } catch (e) {
+            ok(false, `Caught error while getting result from Tab A: ${e}.`);
+          }
+          info(`Fetching result from tab B for ${TEST_MODE_NAMES[aMode]}.`);
+          let resultB;
+          try {
+            resultB = await getResultFunc(tabInfoB.browser);
+          } catch (e) {
+            ok(false, `Caught error while getting result from Tab B: ${e}.`);
+          }
+          // Compare results.
+          let result = false;
+          let shouldIsolate =
+            aMode !== TEST_MODE_NO_ISOLATION && tabSettingA !== tabSettingB;
+          if (aCompareResultFunc) {
+            result = await aCompareResultFunc(shouldIsolate, resultA, resultB);
+          } else {
+            result = shouldIsolate ? resultA !== resultB : resultA === resultB;
+          }
+
+          let msg =
+            `Result of Testing ${TEST_MODE_NAMES[aMode]} for ` +
+            `isolation ${shouldIsolate ? "on" : "off"} with TabSettingA ` +
+            `${tabSettingA} and tabSettingB ${tabSettingB}` +
+            `, resultA = ${resultA}, resultB = ${resultB}`;
+
+          ok(result, msg);
+        }
+
+        // Close Tabs.
+        BrowserTestUtils.removeTab(tabInfoA.tab);
+        BrowserTestUtils.removeTab(tabInfoB.tab);
+
+        // A workaround for avoiding a timing issue in Fission. This workaround
+        // makes sure that the shutdown process between parent and content
+        // is finished before the next round of testing.
+        if (SpecialPowers.useRemoteSubframes) {
+          await new Promise(resolve => {
+            let observer = (subject, topic, data) => {
+              if (topic === "ipc:content-shutdown") {
+                Services.obs.removeObserver(observer, "ipc:content-shutdown");
+                resolve();
+              }
+            };
+            Services.obs.addObserver(observer, "ipc:content-shutdown");
+          });
+        }
+      }
+    });
+  },
+};
diff --git a/browser/components/originattributes/test/browser/test.html b/browser/components/originattributes/test/browser/test.html
new file mode 100644
index 0000000000..fe5c7a2cf7
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test.html
@@ -0,0 +1,20 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1260931</title>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script>
+  window.onmessage = function(evt) {
+    if (evt.data != "HI") {
+      return;
+    }
+
+    window.parent.postMessage("OK", "https://example.net");
+  };
+  </script>
+</head>
+<body>
+  Hello World.
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test.js b/browser/components/originattributes/test/browser/test.js
new file mode 100644
index 0000000000..d290af9b06
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test.js
@@ -0,0 +1 @@
+var i = 1;
diff --git a/browser/components/originattributes/test/browser/test.js^headers^ b/browser/components/originattributes/test/browser/test.js^headers^
new file mode 100644
index 0000000000..2ebf93751b
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test.js^headers^
@@ -0,0 +1 @@
+Set-Cookie: test=foo; SameSite=None; Secure;
diff --git a/browser/components/originattributes/test/browser/test2.html b/browser/components/originattributes/test/browser/test2.html
new file mode 100644
index 0000000000..370be15600
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test2.html
@@ -0,0 +1,12 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1260931</title>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script src="test2.js"></script>
+</head>
+<body>
+  Hello World.
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test2.js b/browser/components/originattributes/test/browser/test2.js
new file mode 100644
index 0000000000..d290af9b06
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test2.js
@@ -0,0 +1 @@
+var i = 1;
diff --git a/browser/components/originattributes/test/browser/test2.js^headers^ b/browser/components/originattributes/test/browser/test2.js^headers^
new file mode 100644
index 0000000000..0fbbf8c3eb
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test2.js^headers^
@@ -0,0 +1 @@
+Set-Cookie: test2=foo; SameSite=None; Secure;
diff --git a/browser/components/originattributes/test/browser/test_firstParty.html b/browser/components/originattributes/test/browser/test_firstParty.html
new file mode 100644
index 0000000000..a2028ba663
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty.html
@@ -0,0 +1,15 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8"/>
+  <title>Test for Bug 1260931</title>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <div>
+    <iframe id="iframe1" src="https://example.com"></iframe>
+    <iframe id="iframe2" sandbox="" src="https://example.com"></iframe>
+    <iframe id="iframe3" sandbox="allow-same-origin" src="https://example.com"></iframe>
+  </div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test_firstParty_cookie.html b/browser/components/originattributes/test/browser/test_firstParty_cookie.html
new file mode 100644
index 0000000000..44547c0d75
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty_cookie.html
@@ -0,0 +1,13 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1260931</title>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script src="test.js"></script>
+</head>
+<body>
+  Hello World.
+  <iframe id="iframe1" src="test2.html"></iframe>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test_firstParty_html_redirect.html b/browser/components/originattributes/test/browser/test_firstParty_html_redirect.html
new file mode 100644
index 0000000000..ac85b1d78a
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty_html_redirect.html
@@ -0,0 +1,9 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf8" http-equiv="refresh" content="0; url=https://example.com/"/>
+  <title>Test for Bug 1260931</title>
+</head>
+<body>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test_firstParty_http_redirect.html b/browser/components/originattributes/test/browser/test_firstParty_http_redirect.html
new file mode 100644
index 0000000000..7b794a011f
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty_http_redirect.html
@@ -0,0 +1,9 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8"/>
+  <title>Test for Bug 1260931</title>
+</head>
+<body>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test_firstParty_http_redirect.html^headers^ b/browser/components/originattributes/test/browser/test_firstParty_http_redirect.html^headers^
new file mode 100644
index 0000000000..ba266f7c68
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty_http_redirect.html^headers^
@@ -0,0 +1,2 @@
+HTTP 302 Found
+Location: https://example.com/browser/browser/components/originattributes/test/browser/dummy.html
diff --git a/browser/components/originattributes/test/browser/test_firstParty_http_redirect_to_same_domain.html b/browser/components/originattributes/test/browser/test_firstParty_http_redirect_to_same_domain.html
new file mode 100644
index 0000000000..7b794a011f
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty_http_redirect_to_same_domain.html
@@ -0,0 +1,9 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8"/>
+  <title>Test for Bug 1260931</title>
+</head>
+<body>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test_firstParty_http_redirect_to_same_domain.html^headers^ b/browser/components/originattributes/test/browser/test_firstParty_http_redirect_to_same_domain.html^headers^
new file mode 100644
index 0000000000..138d6102c1
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty_http_redirect_to_same_domain.html^headers^
@@ -0,0 +1,2 @@
+HTTP 302 Found
+Location: https://example.net/browser/browser/components/originattributes/test/browser/dummy.html
diff --git a/browser/components/originattributes/test/browser/test_firstParty_iframe_http_redirect.html b/browser/components/originattributes/test/browser/test_firstParty_iframe_http_redirect.html
new file mode 100644
index 0000000000..fd7df46c15
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty_iframe_http_redirect.html
@@ -0,0 +1,13 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8"/>
+  <title>Test for Bug 1260931</title>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <div>
+    <iframe id="iframe1" src="test_firstParty_http_redirect.html"></iframe>
+  </div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test_firstParty_postMessage.html b/browser/components/originattributes/test/browser/test_firstParty_postMessage.html
new file mode 100644
index 0000000000..a056909e37
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_firstParty_postMessage.html
@@ -0,0 +1,28 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8"/>
+  <title>Test for Bug 1260931</title>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<script>
+function onload() {
+  let iframe1 = document.getElementById("iframe1");
+  iframe1.contentWindow.postMessage("HI", "https://example.net");
+}
+
+window.onmessage = function(evt) {
+  document.getElementById("message").textContent = evt.data;
+
+  let iframe2 = document.createElement("iframe");
+  iframe2.src = "dummy.html";
+  document.body.appendChild(iframe2);
+};
+</script>
+<body onload="onload()">
+  <div>
+    <iframe id="iframe1" src="test.html"></iframe>
+    <span id="message"></span>
+  </div>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/test_form.html b/browser/components/originattributes/test/browser/test_form.html
new file mode 100644
index 0000000000..db1b900e8b
--- /dev/null
+++ b/browser/components/originattributes/test/browser/test_form.html
@@ -0,0 +1,14 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1260931</title>
+</head>
+<body>
+<form action="test_firstParty_http_redirect_to_same_domain.html" method="POST">
+   First name: <input type="text" name="fname"><br>
+   Last name: <input type="text" name="lname"><br>
+   <input type="submit" id="submit" value="Submit">
+</form>
+</body>
+</html>
diff --git a/browser/components/originattributes/test/browser/window.html b/browser/components/originattributes/test/browser/window.html
new file mode 100644
index 0000000000..efcda61c10
--- /dev/null
+++ b/browser/components/originattributes/test/browser/window.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
+<html>
+  <head>
+    <meta charset="utf8">
+    <title>Page creating a popup</title>
+  </head>
+  <body>
+    <script type="text/javascript">
+    </script>
+  </body>
+</html>
diff --git a/browser/components/originattributes/test/browser/window2.html b/browser/components/originattributes/test/browser/window2.html
new file mode 100644
index 0000000000..955d2cebb0
--- /dev/null
+++ b/browser/components/originattributes/test/browser/window2.html
@@ -0,0 +1,11 @@
+<html>
+  <head>
+    <meta charset="utf8">
+    <title>Page creating a popup</title>
+  </head>
+  <body>
+    <script type="text/javascript">
+       var w = window.open("https://example.com/browser/browser/components/originattributes/test/browser/test_firstParty.html", "test");
+    </script>
+  </body>
+</html>
diff --git a/browser/components/originattributes/test/browser/window3.html b/browser/components/originattributes/test/browser/window3.html
new file mode 100644
index 0000000000..92b473aa9d
--- /dev/null
+++ b/browser/components/originattributes/test/browser/window3.html
@@ -0,0 +1,11 @@
+<html>
+  <head>
+    <meta charset="utf8">
+    <title>Page creating a popup</title>
+  </head>
+  <body>
+    <script type="text/javascript">
+       var w = window.open("https://example.com/browser/browser/components/originattributes/test/browser/test_form.html", "test");
+    </script>
+  </body>
+</html>
diff --git a/browser/components/originattributes/test/browser/window_redirect.html b/browser/components/originattributes/test/browser/window_redirect.html
new file mode 100644
index 0000000000..37beed9101
--- /dev/null
+++ b/browser/components/originattributes/test/browser/window_redirect.html
@@ -0,0 +1,12 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
+<html>
+  <head>
+    <meta charset="utf8">
+    <title>Page creating a popup</title>
+  </head>
+  <body>
+    <script type="text/javascript">
+       var w = window.open("test_firstParty_http_redirect_to_same_domain.html", "test");
+    </script>
+  </body>
+</html>
diff --git a/browser/components/originattributes/test/mochitest/file_empty.html b/browser/components/originattributes/test/mochitest/file_empty.html
new file mode 100644
index 0000000000..15648ec5aa
--- /dev/null
+++ b/browser/components/originattributes/test/mochitest/file_empty.html
@@ -0,0 +1,2 @@
+<h1>I'm just a support file</h1>
+<p>I get loaded to do permission testing.</p>
diff --git a/browser/components/originattributes/test/mochitest/mochitest.toml b/browser/components/originattributes/test/mochitest/mochitest.toml
new file mode 100644
index 0000000000..6db84ec300
--- /dev/null
+++ b/browser/components/originattributes/test/mochitest/mochitest.toml
@@ -0,0 +1,6 @@
+[DEFAULT]
+skip-if = ["os == 'android'"] # bug 1730213
+support-files = ["file_empty.html"]
+
+["test_permissions_api.html"]
+skip-if = ["xorigin"] # Hangs
diff --git a/browser/components/originattributes/test/mochitest/test_permissions_api.html b/browser/components/originattributes/test/mochitest/test_permissions_api.html
new file mode 100644
index 0000000000..56acae77e8
--- /dev/null
+++ b/browser/components/originattributes/test/mochitest/test_permissions_api.html
@@ -0,0 +1,176 @@
+<!--
+  Any copyright is dedicated to the Public Domain.
+  http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE HTML>
+<html>
+
+<head>
+  <meta charset="utf-8">
+  <title>Test for Permissions API</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css">
+</head>
+
+<body>
+  <pre id="test"></pre>
+  <script type="application/javascript">
+  "use strict";
+
+  const {
+    UNKNOWN_ACTION,
+    PROMPT_ACTION,
+    ALLOW_ACTION,
+    DENY_ACTION,
+  } = SpecialPowers.Ci.nsIPermissionManager;
+
+  SimpleTest.waitForExplicitFinish();
+
+  const PERMISSIONS = [{
+    name: "geolocation",
+    type: "geo",
+  }, {
+    name: "notifications",
+    type: "desktop-notification",
+  }, {
+    name: "push",
+    type: "desktop-notification",
+  }, {
+    name: "persistent-storage",
+    type: "persistent-storage",
+  }, {
+    name: "midi",
+    type: "midi",
+  } ];
+
+  const UNSUPPORTED_PERMISSIONS = [
+    "foobarbaz", // Not in spec, for testing only.
+  ];
+
+  // Create a closure, so that tests are run on the correct window object.
+  function createPermissionTester(aWindow) {
+    return {
+      setPermissions(allow) {
+        const permissions = PERMISSIONS.map(({ type }) => {
+          return {
+            type,
+            allow,
+            "context": aWindow.document,
+          };
+        });
+        return new Promise((resolve) => {
+          SpecialPowers.popPermissions(() => {
+            SpecialPowers.pushPermissions(permissions, resolve);
+          });
+        });
+      },
+      checkPermissions(state) {
+        const promisesToQuery = PERMISSIONS.map(({ name }) => {
+          return aWindow.navigator.permissions
+            .query({ name })
+            .then(
+              () => is(state, state, `correct state for '${name}'`),
+              () => ok(false, `query should not have rejected for '${name}'`)
+            );
+          });
+        return Promise.all(promisesToQuery);
+      },
+      checkUnsupportedPermissions() {
+        const promisesToQuery = UNSUPPORTED_PERMISSIONS.map(({ name }) => {
+          return aWindow.navigator.permissions
+            .query({ name })
+            .then(
+              () => ok(false, `query should not have resolved for '${name}'`),
+              error => {
+                is(error.name, "TypeError",
+                  `query should have thrown TypeError for '${name}'`);
+              }
+            );
+          });
+        return Promise.all(promisesToQuery);
+      },
+      promiseStateChanged(name, state) {
+        return aWindow.navigator.permissions
+          .query({ name })
+          .then(status => {
+            return new Promise( resolve => {
+              status.onchange = () => {
+                status.onchange = null;
+                is(status.state, state, `state changed for '${name}'`);
+                resolve();
+              };
+            });
+          },
+          () => ok(false, `query should not have rejected for '${name}'`));
+      },
+      testStatusOnChange() {
+        return new Promise((resolve) => {
+          SpecialPowers.popPermissions(() => {
+            const permission = "geolocation";
+            const promiseGranted = this.promiseStateChanged(permission, "granted");
+            this.setPermissions(ALLOW_ACTION);
+            promiseGranted.then(async () => {
+              const promisePrompt = this.promiseStateChanged(permission, "prompt");
+              await SpecialPowers.popPermissions();
+              return promisePrompt;
+            }).then(resolve);
+          });
+        });
+      },
+      testInvalidQuery() {
+        return aWindow.navigator.permissions
+          .query({ name: "invalid" })
+          .then(
+            () => ok(false, "invalid query should not have resolved"),
+            () => ok(true, "invalid query should have rejected")
+          );
+      },
+    };
+  }
+
+  function enablePrefs() {
+    const ops = {
+      "set": [
+        ["privacy.firstparty.isolate", true],
+      ],
+    };
+    return SpecialPowers.pushPrefEnv(ops);
+  }
+
+  function createIframe() {
+    return new Promise((resolve) => {
+      const iframe = document.createElement("iframe");
+      iframe.src = "file_empty.html";
+      iframe.onload = () => resolve(iframe.contentWindow);
+      document.body.appendChild(iframe);
+    });
+  }
+
+  window.onload = () => {
+    enablePrefs()
+      .then(createIframe)
+      .then(createPermissionTester)
+      .then((tester) => {
+        return tester
+          .checkUnsupportedPermissions()
+          .then(() => tester.setPermissions(UNKNOWN_ACTION))
+          .then(() => tester.checkPermissions("prompt"))
+          .then(() => tester.setPermissions(PROMPT_ACTION))
+          .then(() => tester.checkPermissions("prompt"))
+          .then(() => tester.setPermissions(ALLOW_ACTION))
+          .then(() => tester.checkPermissions("granted"))
+          .then(() => tester.setPermissions(DENY_ACTION))
+          .then(() => tester.checkPermissions("denied"))
+          .then(() => tester.testStatusOnChange())
+          .then(() => tester.testInvalidQuery())
+      })
+      .then(SimpleTest.finish)
+      .catch((e) => {
+        ok(false, `Unexpected error ${e}`);
+        SimpleTest.finish();
+      });
+  };
+  </script>
+</body>
+
+</html>