Merging upstream version 127.0.

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

16 files changed, 2239 insertions, 668 deletions

diff --git a/browser/components/backup/tests/xpcshell/data/test_xulstore.json b/browser/components/backup/tests/xpcshell/data/test_xulstore.json
index 0d0890ab16..e4ae6f1f66 100644
--- a/browser/components/backup/tests/xpcshell/data/test_xulstore.json
+++ b/browser/components/backup/tests/xpcshell/data/test_xulstore.json
@@ -9,7 +9,6 @@
       "sizemode": "normal"
     },
     "sidebar-box": {
-      "sidebarcommand": "viewBookmarksSidebar",
       "width": "323",
       "style": "width: 323px;"
     },
diff --git a/browser/components/backup/tests/xpcshell/head.js b/browser/components/backup/tests/xpcshell/head.js
index 2402870a13..e5ed32fb63 100644
--- a/browser/components/backup/tests/xpcshell/head.js
+++ b/browser/components/backup/tests/xpcshell/head.js
@@ -50,6 +50,9 @@ class FakeBackupResource2 extends BackupResource {
   static get requiresEncryption() {
     return true;
   }
+  static get priority() {
+    return 1;
+  }
 }
 
 /**
@@ -62,6 +65,9 @@ class FakeBackupResource3 extends BackupResource {
   static get requiresEncryption() {
     return false;
   }
+  static get priority() {
+    return 2;
+  }
 }
 
 /**
diff --git a/browser/components/backup/tests/xpcshell/test_AddonsBackupResource.js b/browser/components/backup/tests/xpcshell/test_AddonsBackupResource.js
new file mode 100644
index 0000000000..d1c47ecdb0
--- /dev/null
+++ b/browser/components/backup/tests/xpcshell/test_AddonsBackupResource.js
@@ -0,0 +1,416 @@
+/* Any copyright is dedicated to the Public Domain.
+https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { AddonsBackupResource } = ChromeUtils.importESModule(
+  "resource:///modules/backup/AddonsBackupResource.sys.mjs"
+);
+
+/**
+ * Tests that we can measure the size of all the addons & extensions data.
+ */
+add_task(async function test_measure() {
+  Services.fog.testResetFOG();
+  Services.telemetry.clearScalars();
+
+  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON = 250;
+  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORE = 500;
+  const EXPECTED_KILOBYTES_FOR_STORAGE_SYNC = 50;
+  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_A = 600;
+  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_B = 400;
+  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_C = 150;
+  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_DIRECTORY = 1000;
+  const EXPECTED_KILOBYTES_FOR_EXTENSION_DATA = 100;
+  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORAGE = 200;
+
+  let tempDir = PathUtils.tempDir;
+
+  // Create extensions json files (all the same size).
+  const extensionsFilePath = PathUtils.join(tempDir, "extensions.json");
+  await createKilobyteSizedFile(
+    extensionsFilePath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON
+  );
+  const extensionSettingsFilePath = PathUtils.join(
+    tempDir,
+    "extension-settings.json"
+  );
+  await createKilobyteSizedFile(
+    extensionSettingsFilePath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON
+  );
+  const extensionsPrefsFilePath = PathUtils.join(
+    tempDir,
+    "extension-preferences.json"
+  );
+  await createKilobyteSizedFile(
+    extensionsPrefsFilePath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON
+  );
+  const addonStartupFilePath = PathUtils.join(tempDir, "addonStartup.json.lz4");
+  await createKilobyteSizedFile(
+    addonStartupFilePath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON
+  );
+
+  // Create the extension store permissions data file.
+  let extensionStorePermissionsDataSize = PathUtils.join(
+    tempDir,
+    "extension-store-permissions",
+    "data.safe.bin"
+  );
+  await createKilobyteSizedFile(
+    extensionStorePermissionsDataSize,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORE
+  );
+
+  // Create the storage sync database file.
+  let storageSyncPath = PathUtils.join(tempDir, "storage-sync-v2.sqlite");
+  await createKilobyteSizedFile(
+    storageSyncPath,
+    EXPECTED_KILOBYTES_FOR_STORAGE_SYNC
+  );
+
+  // Create the extensions directory with XPI files.
+  let extensionsXPIAPath = PathUtils.join(
+    tempDir,
+    "extensions",
+    "extension-b.xpi"
+  );
+  let extensionsXPIBPath = PathUtils.join(
+    tempDir,
+    "extensions",
+    "extension-a.xpi"
+  );
+  await createKilobyteSizedFile(
+    extensionsXPIAPath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_A
+  );
+  await createKilobyteSizedFile(
+    extensionsXPIBPath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_B
+  );
+  // Should be ignored.
+  let extensionsXPIStagedPath = PathUtils.join(
+    tempDir,
+    "extensions",
+    "staged",
+    "staged-test-extension.xpi"
+  );
+  let extensionsXPITrashPath = PathUtils.join(
+    tempDir,
+    "extensions",
+    "trash",
+    "trashed-test-extension.xpi"
+  );
+  let extensionsXPIUnpackedPath = PathUtils.join(
+    tempDir,
+    "extensions",
+    "unpacked-extension.xpi",
+    "manifest.json"
+  );
+  await createKilobyteSizedFile(
+    extensionsXPIStagedPath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_C
+  );
+  await createKilobyteSizedFile(
+    extensionsXPITrashPath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_C
+  );
+  await createKilobyteSizedFile(
+    extensionsXPIUnpackedPath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_C
+  );
+
+  // Create the browser extension data directory.
+  let browserExtensionDataPath = PathUtils.join(
+    tempDir,
+    "browser-extension-data",
+    "test-file"
+  );
+  await createKilobyteSizedFile(
+    browserExtensionDataPath,
+    EXPECTED_KILOBYTES_FOR_EXTENSION_DATA
+  );
+
+  // Create the extensions storage directory.
+  let extensionsStoragePath = PathUtils.join(
+    tempDir,
+    "storage",
+    "default",
+    "moz-extension+++test-extension-id",
+    "idb",
+    "data.sqlite"
+  );
+  // Other storage files that should not be counted.
+  let otherStoragePath = PathUtils.join(
+    tempDir,
+    "storage",
+    "default",
+    "https+++accounts.firefox.com",
+    "ls",
+    "data.sqlite"
+  );
+
+  await createKilobyteSizedFile(
+    extensionsStoragePath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORAGE
+  );
+  await createKilobyteSizedFile(
+    otherStoragePath,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORAGE
+  );
+
+  // Measure all the extensions data.
+  let extensionsBackupResource = new AddonsBackupResource();
+  await extensionsBackupResource.measure(tempDir);
+
+  let extensionsJsonSizeMeasurement =
+    Glean.browserBackup.extensionsJsonSize.testGetValue();
+  Assert.equal(
+    extensionsJsonSizeMeasurement,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON * 4, // There are 4 equally sized files.
+    "Should have collected the correct measurement of the total size of all extensions JSON files"
+  );
+
+  let extensionStorePermissionsDataSizeMeasurement =
+    Glean.browserBackup.extensionStorePermissionsDataSize.testGetValue();
+  Assert.equal(
+    extensionStorePermissionsDataSizeMeasurement,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORE,
+    "Should have collected the correct measurement of the size of the extension store permissions data"
+  );
+
+  let storageSyncSizeMeasurement =
+    Glean.browserBackup.storageSyncSize.testGetValue();
+  Assert.equal(
+    storageSyncSizeMeasurement,
+    EXPECTED_KILOBYTES_FOR_STORAGE_SYNC,
+    "Should have collected the correct measurement of the size of the storage sync database"
+  );
+
+  let extensionsXPIDirectorySizeMeasurement =
+    Glean.browserBackup.extensionsXpiDirectorySize.testGetValue();
+  Assert.equal(
+    extensionsXPIDirectorySizeMeasurement,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_DIRECTORY,
+    "Should have collected the correct measurement of the size 2 equally sized XPI files in the extensions directory"
+  );
+
+  let browserExtensionDataSizeMeasurement =
+    Glean.browserBackup.browserExtensionDataSize.testGetValue();
+  Assert.equal(
+    browserExtensionDataSizeMeasurement,
+    EXPECTED_KILOBYTES_FOR_EXTENSION_DATA,
+    "Should have collected the correct measurement of the size of the browser extension data directory"
+  );
+
+  let extensionsStorageSizeMeasurement =
+    Glean.browserBackup.extensionsStorageSize.testGetValue();
+  Assert.equal(
+    extensionsStorageSizeMeasurement,
+    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORAGE,
+    "Should have collected the correct measurement of all the extensions storage"
+  );
+
+  // Compare glean vs telemetry measurements
+  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.extensions_json_size",
+    extensionsJsonSizeMeasurement,
+    "Glean and telemetry measurements for extensions JSON should be equal"
+  );
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.extension_store_permissions_data_size",
+    extensionStorePermissionsDataSizeMeasurement,
+    "Glean and telemetry measurements for extension store permissions data should be equal"
+  );
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.storage_sync_size",
+    storageSyncSizeMeasurement,
+    "Glean and telemetry measurements for storage sync database should be equal"
+  );
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.extensions_xpi_directory_size",
+    extensionsXPIDirectorySizeMeasurement,
+    "Glean and telemetry measurements for extensions directory should be equal"
+  );
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.browser_extension_data_size",
+    browserExtensionDataSizeMeasurement,
+    "Glean and telemetry measurements for browser extension data should be equal"
+  );
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.extensions_storage_size",
+    extensionsStorageSizeMeasurement,
+    "Glean and telemetry measurements for extensions storage should be equal"
+  );
+
+  await maybeRemovePath(tempDir);
+});
+
+/**
+ * Tests that we can handle the extension store permissions data
+ * and moz-extension IndexedDB databases not existing.
+ */
+add_task(async function test_measure_missing_data() {
+  Services.fog.testResetFOG();
+
+  let tempDir = PathUtils.tempDir;
+
+  let extensionsBackupResource = new AddonsBackupResource();
+  await extensionsBackupResource.measure(tempDir);
+
+  let extensionStorePermissionsDataSizeMeasurement =
+    Glean.browserBackup.extensionStorePermissionsDataSize.testGetValue();
+  Assert.equal(
+    extensionStorePermissionsDataSizeMeasurement,
+    null,
+    "Should NOT have collected a measurement for the missing permissions data"
+  );
+
+  let extensionsStorageSizeMeasurement =
+    Glean.browserBackup.extensionsStorageSize.testGetValue();
+  Assert.equal(
+    extensionsStorageSizeMeasurement,
+    null,
+    "Should NOT have collected a measurement for the missing storage data"
+  );
+});
+
+/**
+ * Test that the backup method correctly copies items from the profile directory
+ * into the staging directory.
+ */
+add_task(async function test_backup() {
+  let sandbox = sinon.createSandbox();
+
+  let addonsBackupResource = new AddonsBackupResource();
+  let sourcePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "AddonsBackupResource-source-test"
+  );
+  let stagingPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "AddonsBackupResource-staging-test"
+  );
+
+  const simpleCopyFiles = [
+    { path: "extensions.json" },
+    { path: "extension-settings.json" },
+    { path: "extension-preferences.json" },
+    { path: "addonStartup.json.lz4" },
+    {
+      path: [
+        "browser-extension-data",
+        "{11aa1234-f111-1234-abcd-a9b8c7654d32}",
+      ],
+    },
+    { path: ["extension-store-permissions", "data.safe.bin"] },
+    { path: ["extensions", "{11aa1234-f111-1234-abcd-a9b8c7654d32}.xpi"] },
+  ];
+  await createTestFiles(sourcePath, simpleCopyFiles);
+
+  const junkFiles = [{ path: ["extensions", "junk"] }];
+  await createTestFiles(sourcePath, junkFiles);
+
+  // Create a fake storage-sync-v2 database file. We don't expect this to
+  // be copied to the staging directory in this test due to our stubbing
+  // of the backup method, so we don't include it in `simpleCopyFiles`.
+  await createTestFiles(sourcePath, [{ path: "storage-sync-v2.sqlite" }]);
+
+  let fakeConnection = {
+    backup: sandbox.stub().resolves(true),
+    close: sandbox.stub().resolves(true),
+  };
+  sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
+
+  let manifestEntry = await addonsBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.equal(
+    manifestEntry,
+    null,
+    "AddonsBackupResource.backup should return null as its ManifestEntry"
+  );
+
+  await assertFilesExist(stagingPath, simpleCopyFiles);
+
+  let junkFile = PathUtils.join(stagingPath, "extensions", "junk");
+  Assert.equal(
+    await IOUtils.exists(junkFile),
+    false,
+    `${junkFile} should not exist in the staging folder`
+  );
+
+  // Make sure storage-sync-v2 database is backed up.
+  Assert.ok(
+    fakeConnection.backup.calledOnce,
+    "Called backup the expected number of times for all connections"
+  );
+  Assert.ok(
+    fakeConnection.backup.calledWith(
+      PathUtils.join(stagingPath, "storage-sync-v2.sqlite")
+    ),
+    "Called backup on the storage-sync-v2 Sqlite connection"
+  );
+
+  await maybeRemovePath(stagingPath);
+  await maybeRemovePath(sourcePath);
+
+  sandbox.restore();
+});
+
+/**
+ * Test that the recover method correctly copies items from the recovery
+ * directory into the destination profile directory.
+ */
+add_task(async function test_recover() {
+  let addonsBackupResource = new AddonsBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "addonsBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "addonsBackupResource-test-profile"
+  );
+
+  const files = [
+    { path: "extensions.json" },
+    { path: "extension-settings.json" },
+    { path: "extension-preferences.json" },
+    { path: "addonStartup.json.lz4" },
+    { path: "storage-sync-v2.sqlite" },
+    { path: ["browser-extension-data", "addon@darkreader.org.xpi", "data"] },
+    { path: ["extensions", "addon@darkreader.org.xpi"] },
+    { path: ["extension-store-permissions", "data.safe.bin"] },
+  ];
+  await createTestFiles(recoveryPath, files);
+
+  // The backup method is expected to have returned a null ManifestEntry
+  let postRecoveryEntry = await addonsBackupResource.recover(
+    null /* manifestEntry */,
+    recoveryPath,
+    destProfilePath
+  );
+  Assert.equal(
+    postRecoveryEntry,
+    null,
+    "AddonsBackupResource.recover should return null as its post " +
+      "recovery entry"
+  );
+
+  await assertFilesExist(destProfilePath, files);
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+});
diff --git a/browser/components/backup/tests/xpcshell/test_BackupResource.js b/browser/components/backup/tests/xpcshell/test_BackupResource.js
index 6623f4cd77..42cda918f9 100644
--- a/browser/components/backup/tests/xpcshell/test_BackupResource.js
+++ b/browser/components/backup/tests/xpcshell/test_BackupResource.js
@@ -31,7 +31,8 @@ add_task(async function test_getFileSize() {
 });
 
 /**
- * Tests that BackupService.getDirectorySize will get the total size of all the files in a directory and it's children in kilobytes.
+ * Tests that BackupService.getDirectorySize will get the total size of all the
+ * files in a directory and it's children in kilobytes.
  */
 add_task(async function test_getDirectorySize() {
   let file = do_get_file("data/test_xulstore.json");
@@ -75,3 +76,175 @@ add_task(async function test_bytesToFuzzyKilobytes() {
 
   Assert.equal(smallSize, 1, "Sizes under 10 kilobytes return 1 kilobyte");
 });
+
+/**
+ * Tests that BackupResource.copySqliteDatabases will call `backup` on a new
+ * read-only connection on each database file.
+ */
+add_task(async function test_copySqliteDatabases() {
+  let sandbox = sinon.createSandbox();
+  const SQLITE_PAGES_PER_STEP_PREF = "browser.backup.sqlite.pages_per_step";
+  const SQLITE_STEP_DELAY_MS_PREF = "browser.backup.sqlite.step_delay_ms";
+  const DEFAULT_SQLITE_PAGES_PER_STEP = Services.prefs.getIntPref(
+    SQLITE_PAGES_PER_STEP_PREF
+  );
+  const DEFAULT_SQLITE_STEP_DELAY_MS = Services.prefs.getIntPref(
+    SQLITE_STEP_DELAY_MS_PREF
+  );
+
+  let sourcePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "BackupResource-source-test"
+  );
+  let destPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "BackupResource-dest-test"
+  );
+  let pretendDatabases = ["places.sqlite", "favicons.sqlite"];
+  await createTestFiles(
+    sourcePath,
+    pretendDatabases.map(f => ({ path: f }))
+  );
+
+  let fakeConnection = {
+    backup: sandbox.stub().resolves(true),
+    close: sandbox.stub().resolves(true),
+  };
+  sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
+
+  await BackupResource.copySqliteDatabases(
+    sourcePath,
+    destPath,
+    pretendDatabases
+  );
+
+  Assert.ok(
+    Sqlite.openConnection.calledTwice,
+    "Sqlite.openConnection called twice"
+  );
+  Assert.ok(
+    Sqlite.openConnection.firstCall.calledWith({
+      path: PathUtils.join(sourcePath, "places.sqlite"),
+      readOnly: true,
+    }),
+    "openConnection called with places.sqlite as read-only"
+  );
+  Assert.ok(
+    Sqlite.openConnection.secondCall.calledWith({
+      path: PathUtils.join(sourcePath, "favicons.sqlite"),
+      readOnly: true,
+    }),
+    "openConnection called with favicons.sqlite as read-only"
+  );
+
+  Assert.ok(
+    fakeConnection.backup.calledTwice,
+    "backup on an Sqlite connection called twice"
+  );
+  Assert.ok(
+    fakeConnection.backup.firstCall.calledWith(
+      PathUtils.join(destPath, "places.sqlite"),
+      DEFAULT_SQLITE_PAGES_PER_STEP,
+      DEFAULT_SQLITE_STEP_DELAY_MS
+    ),
+    "backup called with places.sqlite to the destination path with the right " +
+      "pages per step and step delay"
+  );
+  Assert.ok(
+    fakeConnection.backup.secondCall.calledWith(
+      PathUtils.join(destPath, "favicons.sqlite"),
+      DEFAULT_SQLITE_PAGES_PER_STEP,
+      DEFAULT_SQLITE_STEP_DELAY_MS
+    ),
+    "backup called with favicons.sqlite to the destination path with the " +
+      "right pages per step and step delay"
+  );
+
+  Assert.ok(
+    fakeConnection.close.calledTwice,
+    "close on an Sqlite connection called twice"
+  );
+
+  // Now check that we can override the default pages per step and step delay.
+  fakeConnection.backup.resetHistory();
+  const NEW_SQLITE_PAGES_PER_STEP = 10;
+  const NEW_SQLITE_STEP_DELAY_MS = 500;
+  Services.prefs.setIntPref(
+    SQLITE_PAGES_PER_STEP_PREF,
+    NEW_SQLITE_PAGES_PER_STEP
+  );
+  Services.prefs.setIntPref(
+    SQLITE_STEP_DELAY_MS_PREF,
+    NEW_SQLITE_STEP_DELAY_MS
+  );
+  await BackupResource.copySqliteDatabases(
+    sourcePath,
+    destPath,
+    pretendDatabases
+  );
+  Assert.ok(
+    fakeConnection.backup.calledTwice,
+    "backup on an Sqlite connection called twice"
+  );
+  Assert.ok(
+    fakeConnection.backup.firstCall.calledWith(
+      PathUtils.join(destPath, "places.sqlite"),
+      NEW_SQLITE_PAGES_PER_STEP,
+      NEW_SQLITE_STEP_DELAY_MS
+    ),
+    "backup called with places.sqlite to the destination path with the right " +
+      "pages per step and step delay"
+  );
+  Assert.ok(
+    fakeConnection.backup.secondCall.calledWith(
+      PathUtils.join(destPath, "favicons.sqlite"),
+      NEW_SQLITE_PAGES_PER_STEP,
+      NEW_SQLITE_STEP_DELAY_MS
+    ),
+    "backup called with favicons.sqlite to the destination path with the " +
+      "right pages per step and step delay"
+  );
+
+  await maybeRemovePath(sourcePath);
+  await maybeRemovePath(destPath);
+  sandbox.restore();
+});
+
+/**
+ * Tests that BackupResource.copyFiles will copy files from one directory to
+ * another.
+ */
+add_task(async function test_copyFiles() {
+  let sourcePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "BackupResource-source-test"
+  );
+  let destPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "BackupResource-dest-test"
+  );
+
+  const testFiles = [
+    { path: "file1.txt" },
+    { path: ["some", "nested", "file", "file2.txt"] },
+    { path: "file3.txt" },
+  ];
+
+  await createTestFiles(sourcePath, testFiles);
+
+  await BackupResource.copyFiles(sourcePath, destPath, [
+    "file1.txt",
+    "some",
+    "file3.txt",
+    "does-not-exist.txt",
+  ]);
+
+  await assertFilesExist(destPath, testFiles);
+  Assert.ok(
+    !(await IOUtils.exists(PathUtils.join(destPath, "does-not-exist.txt"))),
+    "does-not-exist.txt wasn't somehow written to."
+  );
+
+  await maybeRemovePath(sourcePath);
+  await maybeRemovePath(destPath);
+});
diff --git a/browser/components/backup/tests/xpcshell/test_BackupService.js b/browser/components/backup/tests/xpcshell/test_BackupService.js
new file mode 100644
index 0000000000..33fb9fbb99
--- /dev/null
+++ b/browser/components/backup/tests/xpcshell/test_BackupService.js
@@ -0,0 +1,451 @@
+/* Any copyright is dedicated to the Public Domain.
+https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { AppConstants } = ChromeUtils.importESModule(
+  "resource://gre/modules/AppConstants.sys.mjs"
+);
+const { JsonSchemaValidator } = ChromeUtils.importESModule(
+  "resource://gre/modules/components-utils/JsonSchemaValidator.sys.mjs"
+);
+const { UIState } = ChromeUtils.importESModule(
+  "resource://services-sync/UIState.sys.mjs"
+);
+const { ClientID } = ChromeUtils.importESModule(
+  "resource://gre/modules/ClientID.sys.mjs"
+);
+
+add_setup(function () {
+  // Much of this setup is copied from toolkit/profile/xpcshell/head.js. It is
+  // needed in order to put the xpcshell test environment into the state where
+  // it thinks its profile is the one pointed at by
+  // nsIToolkitProfileService.currentProfile.
+  let gProfD = do_get_profile();
+  let gDataHome = gProfD.clone();
+  gDataHome.append("data");
+  gDataHome.createUnique(Ci.nsIFile.DIRECTORY_TYPE, 0o755);
+  let gDataHomeLocal = gProfD.clone();
+  gDataHomeLocal.append("local");
+  gDataHomeLocal.createUnique(Ci.nsIFile.DIRECTORY_TYPE, 0o755);
+
+  let xreDirProvider = Cc["@mozilla.org/xre/directory-provider;1"].getService(
+    Ci.nsIXREDirProvider
+  );
+  xreDirProvider.setUserDataDirectory(gDataHome, false);
+  xreDirProvider.setUserDataDirectory(gDataHomeLocal, true);
+
+  let profileSvc = Cc["@mozilla.org/toolkit/profile-service;1"].getService(
+    Ci.nsIToolkitProfileService
+  );
+
+  let createdProfile = {};
+  let didCreate = profileSvc.selectStartupProfile(
+    ["xpcshell"],
+    false,
+    AppConstants.UPDATE_CHANNEL,
+    "",
+    {},
+    {},
+    createdProfile
+  );
+  Assert.ok(didCreate, "Created a testing profile and set it to current.");
+  Assert.equal(
+    profileSvc.currentProfile,
+    createdProfile.value,
+    "Profile set to current"
+  );
+});
+
+/**
+ * A utility function for testing BackupService.createBackup. This helper
+ * function:
+ *
+ * 1. Ensures that `backup` will be called on BackupResources with the service
+ * 2. Ensures that a backup-manifest.json will be written and contain the
+ *    ManifestEntry data returned by each BackupResource.
+ * 3. Ensures that a `staging` folder will be written to and renamed properly
+ *    once the backup creation is complete.
+ *
+ * Once this is done, a task function can be run. The task function is passed
+ * the parsed backup-manifest.json object as its only argument.
+ *
+ * @param {object} sandbox
+ *   The Sinon sandbox to be used stubs and mocks. The test using this helper
+ *   is responsible for creating and resetting this sandbox.
+ * @param {Function} taskFn
+ *   A function that is run once all default checks are done on the manifest
+ *   and staging folder. After this function returns, the staging folder will
+ *   be cleaned up.
+ * @returns {Promise<undefined>}
+ */
+async function testCreateBackupHelper(sandbox, taskFn) {
+  const EXPECTED_CLIENT_ID = await ClientID.getClientID();
+
+  let fake1ManifestEntry = { fake1: "hello from 1" };
+  sandbox
+    .stub(FakeBackupResource1.prototype, "backup")
+    .resolves(fake1ManifestEntry);
+
+  sandbox
+    .stub(FakeBackupResource2.prototype, "backup")
+    .rejects(new Error("Some failure to backup"));
+
+  let fake3ManifestEntry = { fake3: "hello from 3" };
+  sandbox
+    .stub(FakeBackupResource3.prototype, "backup")
+    .resolves(fake3ManifestEntry);
+
+  let bs = new BackupService({
+    FakeBackupResource1,
+    FakeBackupResource2,
+    FakeBackupResource3,
+  });
+
+  let fakeProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "createBackupTest"
+  );
+
+  await bs.createBackup({ profilePath: fakeProfilePath });
+
+  // We expect the staging folder to exist then be renamed under the fakeProfilePath.
+  // We should also find a folder for each fake BackupResource.
+  let backupsFolderPath = PathUtils.join(fakeProfilePath, "backups");
+  let stagingPath = PathUtils.join(backupsFolderPath, "staging");
+
+  // For now, we expect a single backup only to be saved.
+  let backups = await IOUtils.getChildren(backupsFolderPath);
+  Assert.equal(
+    backups.length,
+    1,
+    "There should only be 1 backup in the backups folder"
+  );
+
+  let renamedFilename = await PathUtils.filename(backups[0]);
+  let expectedFormatRegex = /^\d{4}(-\d{2}){2}T(\d{2}-){2}\d{2}Z$/;
+  Assert.ok(
+    renamedFilename.match(expectedFormatRegex),
+    "Renamed staging folder should have format YYYY-MM-DDTHH-mm-ssZ"
+  );
+
+  let stagingPathRenamed = PathUtils.join(backupsFolderPath, renamedFilename);
+
+  for (let backupResourceClass of [
+    FakeBackupResource1,
+    FakeBackupResource2,
+    FakeBackupResource3,
+  ]) {
+    let expectedResourceFolderBeforeRename = PathUtils.join(
+      stagingPath,
+      backupResourceClass.key
+    );
+    let expectedResourceFolderAfterRename = PathUtils.join(
+      stagingPathRenamed,
+      backupResourceClass.key
+    );
+
+    Assert.ok(
+      await IOUtils.exists(expectedResourceFolderAfterRename),
+      `BackupResource folder exists for ${backupResourceClass.key} after rename`
+    );
+    Assert.ok(
+      backupResourceClass.prototype.backup.calledOnce,
+      `Backup was called for ${backupResourceClass.key}`
+    );
+    Assert.ok(
+      backupResourceClass.prototype.backup.calledWith(
+        expectedResourceFolderBeforeRename,
+        fakeProfilePath
+      ),
+      `Backup was called in the staging folder for ${backupResourceClass.key} before rename`
+    );
+  }
+
+  // Check that resources were called from highest to lowest backup priority.
+  sinon.assert.callOrder(
+    FakeBackupResource3.prototype.backup,
+    FakeBackupResource2.prototype.backup,
+    FakeBackupResource1.prototype.backup
+  );
+
+  let manifestPath = PathUtils.join(
+    stagingPathRenamed,
+    BackupService.MANIFEST_FILE_NAME
+  );
+
+  Assert.ok(await IOUtils.exists(manifestPath), "Manifest file exists");
+  let manifest = await IOUtils.readJSON(manifestPath);
+
+  let schema = await BackupService.MANIFEST_SCHEMA;
+  let validationResult = JsonSchemaValidator.validate(manifest, schema);
+  Assert.ok(validationResult.valid, "Schema matches manifest");
+  Assert.deepEqual(
+    Object.keys(manifest.resources).sort(),
+    ["fake1", "fake3"],
+    "Manifest contains all expected BackupResource keys"
+  );
+  Assert.deepEqual(
+    manifest.resources.fake1,
+    fake1ManifestEntry,
+    "Manifest contains the expected entry for FakeBackupResource1"
+  );
+  Assert.deepEqual(
+    manifest.resources.fake3,
+    fake3ManifestEntry,
+    "Manifest contains the expected entry for FakeBackupResource3"
+  );
+  Assert.equal(
+    manifest.meta.legacyClientID,
+    EXPECTED_CLIENT_ID,
+    "The client ID was stored properly."
+  );
+
+  taskFn(manifest);
+
+  // After createBackup is more fleshed out, we're going to want to make sure
+  // that we're writing the manifest file and that it contains the expected
+  // ManifestEntry objects, and that the staging folder was successfully
+  // renamed with the current date.
+  await IOUtils.remove(fakeProfilePath, { recursive: true });
+}
+
+/**
+ * Tests that calling BackupService.createBackup will call backup on each
+ * registered BackupResource, and that each BackupResource will have a folder
+ * created for them to write into. Tests in the signed-out state.
+ */
+add_task(async function test_createBackup_signed_out() {
+  let sandbox = sinon.createSandbox();
+
+  sandbox
+    .stub(UIState, "get")
+    .returns({ status: UIState.STATUS_NOT_CONFIGURED });
+  await testCreateBackupHelper(sandbox, manifest => {
+    Assert.equal(
+      manifest.meta.accountID,
+      undefined,
+      "Account ID should be undefined."
+    );
+    Assert.equal(
+      manifest.meta.accountEmail,
+      undefined,
+      "Account email should be undefined."
+    );
+  });
+
+  sandbox.restore();
+});
+
+/**
+ * Tests that calling BackupService.createBackup will call backup on each
+ * registered BackupResource, and that each BackupResource will have a folder
+ * created for them to write into. Tests in the signed-in state.
+ */
+add_task(async function test_createBackup_signed_in() {
+  let sandbox = sinon.createSandbox();
+
+  const TEST_UID = "ThisIsMyTestUID";
+  const TEST_EMAIL = "foxy@mozilla.org";
+
+  sandbox.stub(UIState, "get").returns({
+    status: UIState.STATUS_SIGNED_IN,
+    uid: TEST_UID,
+    email: TEST_EMAIL,
+  });
+
+  await testCreateBackupHelper(sandbox, manifest => {
+    Assert.equal(
+      manifest.meta.accountID,
+      TEST_UID,
+      "Account ID should be set properly."
+    );
+    Assert.equal(
+      manifest.meta.accountEmail,
+      TEST_EMAIL,
+      "Account email should be set properly."
+    );
+  });
+
+  sandbox.restore();
+});
+
+/**
+ * Creates a directory that looks a lot like a decompressed backup archive,
+ * and then tests that BackupService.recoverFromBackup can create a new profile
+ * and recover into it.
+ */
+add_task(async function test_recoverFromBackup() {
+  let sandbox = sinon.createSandbox();
+  let fakeEntryMap = new Map();
+  let backupResourceClasses = [
+    FakeBackupResource1,
+    FakeBackupResource2,
+    FakeBackupResource3,
+  ];
+
+  let i = 1;
+  for (let backupResourceClass of backupResourceClasses) {
+    let fakeManifestEntry = { [`fake${i}`]: `hello from backup - ${i}` };
+    sandbox
+      .stub(backupResourceClass.prototype, "backup")
+      .resolves(fakeManifestEntry);
+
+    let fakePostRecoveryEntry = { [`fake${i}`]: `hello from recover - ${i}` };
+    sandbox
+      .stub(backupResourceClass.prototype, "recover")
+      .resolves(fakePostRecoveryEntry);
+
+    fakeEntryMap.set(backupResourceClass, {
+      manifestEntry: fakeManifestEntry,
+      postRecoveryEntry: fakePostRecoveryEntry,
+    });
+
+    ++i;
+  }
+
+  let bs = new BackupService({
+    FakeBackupResource1,
+    FakeBackupResource2,
+    FakeBackupResource3,
+  });
+
+  let oldProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "recoverFromBackupTest"
+  );
+  let newProfileRootPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "recoverFromBackupTest-newProfileRoot"
+  );
+
+  let { stagingPath } = await bs.createBackup({ profilePath: oldProfilePath });
+
+  let testTelemetryStateObject = {
+    clientID: "ed209123-04a1-04a1-04a1-c0ffeec0ffee",
+  };
+  await IOUtils.writeJSON(
+    PathUtils.join(PathUtils.profileDir, "datareporting", "state.json"),
+    testTelemetryStateObject
+  );
+
+  let profile = await bs.recoverFromBackup(
+    stagingPath,
+    false /* shouldLaunch */,
+    newProfileRootPath
+  );
+  Assert.ok(profile, "An nsIToolkitProfile was created.");
+  let newProfilePath = profile.rootDir.path;
+
+  let postRecoveryFilePath = PathUtils.join(
+    newProfilePath,
+    "post-recovery.json"
+  );
+  let postRecovery = await IOUtils.readJSON(postRecoveryFilePath);
+
+  for (let backupResourceClass of backupResourceClasses) {
+    let expectedResourceFolder = PathUtils.join(
+      stagingPath,
+      backupResourceClass.key
+    );
+
+    let { manifestEntry, postRecoveryEntry } =
+      fakeEntryMap.get(backupResourceClass);
+
+    Assert.ok(
+      backupResourceClass.prototype.recover.calledOnce,
+      `Recover was called for ${backupResourceClass.key}`
+    );
+    Assert.ok(
+      backupResourceClass.prototype.recover.calledWith(
+        manifestEntry,
+        expectedResourceFolder,
+        newProfilePath
+      ),
+      `Recover was passed the right arguments for ${backupResourceClass.key}`
+    );
+    Assert.deepEqual(
+      postRecoveryEntry,
+      postRecovery[backupResourceClass.key],
+      "The post recovery data is as expected"
+    );
+  }
+
+  let newProfileTelemetryStateObject = await IOUtils.readJSON(
+    PathUtils.join(newProfileRootPath, "datareporting", "state.json")
+  );
+  Assert.deepEqual(
+    testTelemetryStateObject,
+    newProfileTelemetryStateObject,
+    "Recovered profile inherited telemetry state from the profile that " +
+      "initiated recovery"
+  );
+
+  await IOUtils.remove(oldProfilePath, { recursive: true });
+  await IOUtils.remove(newProfileRootPath, { recursive: true });
+  sandbox.restore();
+});
+
+/**
+ * Tests that if there's a post-recovery.json file in the profile directory
+ * when checkForPostRecovery() is called, that it is processed, and the
+ * postRecovery methods on the associated BackupResources are called with the
+ * entry values from the file.
+ */
+add_task(async function test_checkForPostRecovery() {
+  let sandbox = sinon.createSandbox();
+
+  let testProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "checkForPostRecoveryTest"
+  );
+  let fakePostRecoveryObject = {
+    [FakeBackupResource1.key]: "test 1",
+    [FakeBackupResource3.key]: "test 3",
+  };
+  await IOUtils.writeJSON(
+    PathUtils.join(testProfilePath, BackupService.POST_RECOVERY_FILE_NAME),
+    fakePostRecoveryObject
+  );
+
+  sandbox.stub(FakeBackupResource1.prototype, "postRecovery").resolves();
+  sandbox.stub(FakeBackupResource2.prototype, "postRecovery").resolves();
+  sandbox.stub(FakeBackupResource3.prototype, "postRecovery").resolves();
+
+  let bs = new BackupService({
+    FakeBackupResource1,
+    FakeBackupResource2,
+    FakeBackupResource3,
+  });
+
+  await bs.checkForPostRecovery(testProfilePath);
+  await bs.postRecoveryComplete;
+
+  Assert.ok(
+    FakeBackupResource1.prototype.postRecovery.calledOnce,
+    "FakeBackupResource1.postRecovery was called once"
+  );
+  Assert.ok(
+    FakeBackupResource2.prototype.postRecovery.notCalled,
+    "FakeBackupResource2.postRecovery was not called"
+  );
+  Assert.ok(
+    FakeBackupResource3.prototype.postRecovery.calledOnce,
+    "FakeBackupResource3.postRecovery was called once"
+  );
+  Assert.ok(
+    FakeBackupResource1.prototype.postRecovery.calledWith(
+      fakePostRecoveryObject[FakeBackupResource1.key]
+    ),
+    "FakeBackupResource1.postRecovery was called with the expected argument"
+  );
+  Assert.ok(
+    FakeBackupResource3.prototype.postRecovery.calledWith(
+      fakePostRecoveryObject[FakeBackupResource3.key]
+    ),
+    "FakeBackupResource3.postRecovery was called with the expected argument"
+  );
+
+  await IOUtils.remove(testProfilePath, { recursive: true });
+  sandbox.restore();
+});
diff --git a/browser/components/backup/tests/xpcshell/test_BackupService_takeMeasurements.js b/browser/components/backup/tests/xpcshell/test_BackupService_takeMeasurements.js
new file mode 100644
index 0000000000..c73482dfe6
--- /dev/null
+++ b/browser/components/backup/tests/xpcshell/test_BackupService_takeMeasurements.js
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_setup(() => {
+  // FOG needs to be initialized in order for data to flow.
+  Services.fog.initializeFOG();
+  Services.telemetry.clearScalars();
+});
+
+/**
+ * Tests that calling `BackupService.takeMeasurements` will call the measure
+ * method of all registered BackupResource classes.
+ */
+add_task(async function test_takeMeasurements() {
+  let sandbox = sinon.createSandbox();
+  sandbox.stub(FakeBackupResource1.prototype, "measure").resolves();
+  sandbox
+    .stub(FakeBackupResource2.prototype, "measure")
+    .rejects(new Error("Some failure to measure"));
+
+  let bs = new BackupService({ FakeBackupResource1, FakeBackupResource2 });
+  await bs.takeMeasurements();
+
+  for (let backupResourceClass of [FakeBackupResource1, FakeBackupResource2]) {
+    Assert.ok(
+      backupResourceClass.prototype.measure.calledOnce,
+      "Measure was called"
+    );
+    Assert.ok(
+      backupResourceClass.prototype.measure.calledWith(PathUtils.profileDir),
+      "Measure was called with the profile directory argument"
+    );
+  }
+
+  sandbox.restore();
+});
+
+/**
+ * Tests that we can measure the disk space available in the profile directory.
+ */
+add_task(async function test_profDDiskSpace() {
+  let bs = new BackupService();
+  await bs.takeMeasurements();
+  let measurement = Glean.browserBackup.profDDiskSpace.testGetValue();
+  TelemetryTestUtils.assertScalar(
+    TelemetryTestUtils.getProcessScalars("parent", false, true),
+    "browser.backup.prof_d_disk_space",
+    measurement
+  );
+
+  Assert.greater(
+    measurement,
+    0,
+    "Should have collected a measurement for the profile directory storage " +
+      "device"
+  );
+});
diff --git a/browser/components/backup/tests/xpcshell/test_CookiesBackupResource.js b/browser/components/backup/tests/xpcshell/test_CookiesBackupResource.js
new file mode 100644
index 0000000000..1690580437
--- /dev/null
+++ b/browser/components/backup/tests/xpcshell/test_CookiesBackupResource.js
@@ -0,0 +1,142 @@
+/* Any copyright is dedicated to the Public Domain.
+https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { CookiesBackupResource } = ChromeUtils.importESModule(
+  "resource:///modules/backup/CookiesBackupResource.sys.mjs"
+);
+
+/**
+ * Tests that we can measure the Cookies db in a profile directory.
+ */
+add_task(async function test_measure() {
+  const EXPECTED_COOKIES_DB_SIZE = 1230;
+
+  Services.fog.testResetFOG();
+
+  // Create resource files in temporary directory
+  let tempDir = PathUtils.tempDir;
+  let tempCookiesDBPath = PathUtils.join(tempDir, "cookies.sqlite");
+  await createKilobyteSizedFile(tempCookiesDBPath, EXPECTED_COOKIES_DB_SIZE);
+
+  let cookiesBackupResource = new CookiesBackupResource();
+  await cookiesBackupResource.measure(tempDir);
+
+  let cookiesMeasurement = Glean.browserBackup.cookiesSize.testGetValue();
+  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
+
+  // Compare glean vs telemetry measurements
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.cookies_size",
+    cookiesMeasurement,
+    "Glean and telemetry measurements for cookies.sqlite should be equal"
+  );
+
+  // Compare glean measurements vs actual file sizes
+  Assert.equal(
+    cookiesMeasurement,
+    EXPECTED_COOKIES_DB_SIZE,
+    "Should have collected the correct glean measurement for cookies.sqlite"
+  );
+
+  await maybeRemovePath(tempCookiesDBPath);
+});
+
+/**
+ * Test that the backup method correctly copies items from the profile directory
+ * into the staging directory.
+ */
+add_task(async function test_backup() {
+  let sandbox = sinon.createSandbox();
+
+  let cookiesBackupResource = new CookiesBackupResource();
+  let sourcePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CookiesBackupResource-source-test"
+  );
+  let stagingPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CookiesBackupResource-staging-test"
+  );
+
+  // Make sure this file exists in the source directory, otherwise
+  // BackupResource will skip attempting to back it up.
+  await createTestFiles(sourcePath, [{ path: "cookies.sqlite" }]);
+
+  // We have no need to test that Sqlite.sys.mjs's backup method is working -
+  // this is something that is tested in Sqlite's own tests. We can just make
+  // sure that it's being called using sinon. Unfortunately, we cannot do the
+  // same thing with IOUtils.copy, as its methods are not stubbable.
+  let fakeConnection = {
+    backup: sandbox.stub().resolves(true),
+    close: sandbox.stub().resolves(true),
+  };
+  sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
+
+  let manifestEntry = await cookiesBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.equal(
+    manifestEntry,
+    null,
+    "CookiesBackupResource.backup should return null as its ManifestEntry"
+  );
+
+  // Next, we'll make sure that the Sqlite connection had `backup` called on it
+  // with the right arguments.
+  Assert.ok(
+    fakeConnection.backup.calledOnce,
+    "Called backup the expected number of times for all connections"
+  );
+  Assert.ok(
+    fakeConnection.backup.calledWith(
+      PathUtils.join(stagingPath, "cookies.sqlite")
+    ),
+    "Called backup on the cookies.sqlite Sqlite connection"
+  );
+
+  await maybeRemovePath(stagingPath);
+  await maybeRemovePath(sourcePath);
+
+  sandbox.restore();
+});
+
+/**
+ * Test that the recover method correctly copies items from the recovery
+ * directory into the destination profile directory.
+ */
+add_task(async function test_recover() {
+  let cookiesBackupResource = new CookiesBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CookiesBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CookiesBackupResource-test-profile"
+  );
+
+  const simpleCopyFiles = [{ path: "cookies.sqlite" }];
+  await createTestFiles(recoveryPath, simpleCopyFiles);
+
+  // The backup method is expected to have returned a null ManifestEntry
+  let postRecoveryEntry = await cookiesBackupResource.recover(
+    null /* manifestEntry */,
+    recoveryPath,
+    destProfilePath
+  );
+  Assert.equal(
+    postRecoveryEntry,
+    null,
+    "CookiesBackupResource.recover should return null as its post " +
+      "recovery entry"
+  );
+
+  await assertFilesExist(destProfilePath, simpleCopyFiles);
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+});
diff --git a/browser/components/backup/tests/xpcshell/test_CredentialsAndSecurityBackupResource.js b/browser/components/backup/tests/xpcshell/test_CredentialsAndSecurityBackupResource.js
new file mode 100644
index 0000000000..f53fec8d3f
--- /dev/null
+++ b/browser/components/backup/tests/xpcshell/test_CredentialsAndSecurityBackupResource.js
@@ -0,0 +1,215 @@
+/* Any copyright is dedicated to the Public Domain.
+https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { CredentialsAndSecurityBackupResource } = ChromeUtils.importESModule(
+  "resource:///modules/backup/CredentialsAndSecurityBackupResource.sys.mjs"
+);
+
+/**
+ * Tests that we can measure credentials related files in the profile directory.
+ */
+add_task(async function test_measure() {
+  Services.fog.testResetFOG();
+
+  const EXPECTED_CREDENTIALS_KILOBYTES_SIZE = 413;
+  const EXPECTED_SECURITY_KILOBYTES_SIZE = 231;
+
+  // Create resource files in temporary directory
+  const tempDir = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CredentialsAndSecurityBackupResource-measurement-test"
+  );
+
+  const mockFiles = [
+    // Set up credentials files
+    { path: "key4.db", sizeInKB: 300 },
+    { path: "logins.json", sizeInKB: 1 },
+    { path: "logins-backup.json", sizeInKB: 1 },
+    { path: "autofill-profiles.json", sizeInKB: 1 },
+    { path: "credentialstate.sqlite", sizeInKB: 100 },
+    { path: "signedInUser.json", sizeInKB: 5 },
+    // Set up security files
+    { path: "cert9.db", sizeInKB: 230 },
+    { path: "pkcs11.txt", sizeInKB: 1 },
+  ];
+
+  await createTestFiles(tempDir, mockFiles);
+
+  let credentialsAndSecurityBackupResource =
+    new CredentialsAndSecurityBackupResource();
+  await credentialsAndSecurityBackupResource.measure(tempDir);
+
+  let credentialsMeasurement =
+    Glean.browserBackup.credentialsDataSize.testGetValue();
+  let securityMeasurement = Glean.browserBackup.securityDataSize.testGetValue();
+  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
+
+  // Credentials measurements
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.credentials_data_size",
+    credentialsMeasurement,
+    "Glean and telemetry measurements for credentials data should be equal"
+  );
+
+  Assert.equal(
+    credentialsMeasurement,
+    EXPECTED_CREDENTIALS_KILOBYTES_SIZE,
+    "Should have collected the correct glean measurement for credentials files"
+  );
+
+  // Security measurements
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.security_data_size",
+    securityMeasurement,
+    "Glean and telemetry measurements for security data should be equal"
+  );
+  Assert.equal(
+    securityMeasurement,
+    EXPECTED_SECURITY_KILOBYTES_SIZE,
+    "Should have collected the correct glean measurement for security files"
+  );
+
+  // Cleanup
+  await maybeRemovePath(tempDir);
+});
+
+/**
+ * Test that the backup method correctly copies items from the profile directory
+ * into the staging directory.
+ */
+add_task(async function test_backup() {
+  let sandbox = sinon.createSandbox();
+
+  let credentialsAndSecurityBackupResource =
+    new CredentialsAndSecurityBackupResource();
+  let sourcePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CredentialsAndSecurityBackupResource-source-test"
+  );
+  let stagingPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CredentialsAndSecurityBackupResource-staging-test"
+  );
+
+  const simpleCopyFiles = [
+    { path: "logins.json", sizeInKB: 1 },
+    { path: "logins-backup.json", sizeInKB: 1 },
+    { path: "autofill-profiles.json", sizeInKB: 1 },
+    { path: "signedInUser.json", sizeInKB: 5 },
+    { path: "pkcs11.txt", sizeInKB: 1 },
+  ];
+  await createTestFiles(sourcePath, simpleCopyFiles);
+
+  // Create our fake database files. We don't expect these to be copied to the
+  // staging directory in this test due to our stubbing of the backup method, so
+  // we don't include it in `simpleCopyFiles`.
+  await createTestFiles(sourcePath, [
+    { path: "cert9.db" },
+    { path: "key4.db" },
+    { path: "credentialstate.sqlite" },
+  ]);
+
+  // We have no need to test that Sqlite.sys.mjs's backup method is working -
+  // this is something that is tested in Sqlite's own tests. We can just make
+  // sure that it's being called using sinon. Unfortunately, we cannot do the
+  // same thing with IOUtils.copy, as its methods are not stubbable.
+  let fakeConnection = {
+    backup: sandbox.stub().resolves(true),
+    close: sandbox.stub().resolves(true),
+  };
+  sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
+
+  let manifestEntry = await credentialsAndSecurityBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+
+  Assert.equal(
+    manifestEntry,
+    null,
+    "CredentialsAndSecurityBackupResource.backup should return null as its ManifestEntry"
+  );
+
+  await assertFilesExist(stagingPath, simpleCopyFiles);
+
+  // Next, we'll make sure that the Sqlite connection had `backup` called on it
+  // with the right arguments.
+  Assert.ok(
+    fakeConnection.backup.calledThrice,
+    "Called backup the expected number of times for all connections"
+  );
+  Assert.ok(
+    fakeConnection.backup.firstCall.calledWith(
+      PathUtils.join(stagingPath, "cert9.db")
+    ),
+    "Called backup on cert9.db connection first"
+  );
+  Assert.ok(
+    fakeConnection.backup.secondCall.calledWith(
+      PathUtils.join(stagingPath, "key4.db")
+    ),
+    "Called backup on key4.db connection second"
+  );
+  Assert.ok(
+    fakeConnection.backup.thirdCall.calledWith(
+      PathUtils.join(stagingPath, "credentialstate.sqlite")
+    ),
+    "Called backup on credentialstate.sqlite connection third"
+  );
+
+  await maybeRemovePath(stagingPath);
+  await maybeRemovePath(sourcePath);
+
+  sandbox.restore();
+});
+
+/**
+ * Test that the recover method correctly copies items from the recovery
+ * directory into the destination profile directory.
+ */
+add_task(async function test_recover() {
+  let credentialsAndSecurityBackupResource =
+    new CredentialsAndSecurityBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CredentialsAndSecurityBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "CredentialsAndSecurityBackupResource-test-profile"
+  );
+
+  const files = [
+    { path: "logins.json" },
+    { path: "logins-backup.json" },
+    { path: "autofill-profiles.json" },
+    { path: "credentialstate.sqlite" },
+    { path: "signedInUser.json" },
+    { path: "cert9.db" },
+    { path: "key4.db" },
+    { path: "pkcs11.txt" },
+  ];
+  await createTestFiles(recoveryPath, files);
+
+  // The backup method is expected to have returned a null ManifestEntry
+  let postRecoveryEntry = await credentialsAndSecurityBackupResource.recover(
+    null /* manifestEntry */,
+    recoveryPath,
+    destProfilePath
+  );
+  Assert.equal(
+    postRecoveryEntry,
+    null,
+    "CredentialsAndSecurityBackupResource.recover should return null as its post " +
+      "recovery entry"
+  );
+
+  await assertFilesExist(destProfilePath, files);
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+});
diff --git a/browser/components/backup/tests/xpcshell/test_FormHistoryBackupResource.js b/browser/components/backup/tests/xpcshell/test_FormHistoryBackupResource.js
new file mode 100644
index 0000000000..93434daa9c
--- /dev/null
+++ b/browser/components/backup/tests/xpcshell/test_FormHistoryBackupResource.js
@@ -0,0 +1,146 @@
+/* Any copyright is dedicated to the Public Domain.
+https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { FormHistoryBackupResource } = ChromeUtils.importESModule(
+  "resource:///modules/backup/FormHistoryBackupResource.sys.mjs"
+);
+
+/**
+ * Tests that we can measure the Form History db in a profile directory.
+ */
+add_task(async function test_measure() {
+  const EXPECTED_FORM_HISTORY_DB_SIZE = 500;
+
+  Services.fog.testResetFOG();
+
+  // Create resource files in temporary directory
+  let tempDir = PathUtils.tempDir;
+  let tempFormHistoryDBPath = PathUtils.join(tempDir, "formhistory.sqlite");
+  await createKilobyteSizedFile(
+    tempFormHistoryDBPath,
+    EXPECTED_FORM_HISTORY_DB_SIZE
+  );
+
+  let formHistoryBackupResource = new FormHistoryBackupResource();
+  await formHistoryBackupResource.measure(tempDir);
+
+  let formHistoryMeasurement =
+    Glean.browserBackup.formHistorySize.testGetValue();
+  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
+
+  // Compare glean vs telemetry measurements
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.form_history_size",
+    formHistoryMeasurement,
+    "Glean and telemetry measurements for formhistory.sqlite should be equal"
+  );
+
+  // Compare glean measurements vs actual file sizes
+  Assert.equal(
+    formHistoryMeasurement,
+    EXPECTED_FORM_HISTORY_DB_SIZE,
+    "Should have collected the correct glean measurement for formhistory.sqlite"
+  );
+
+  await IOUtils.remove(tempFormHistoryDBPath);
+});
+
+/**
+ * Test that the backup method correctly copies items from the profile directory
+ * into the staging directory.
+ */
+add_task(async function test_backup() {
+  let sandbox = sinon.createSandbox();
+
+  let formHistoryBackupResource = new FormHistoryBackupResource();
+  let sourcePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "FormHistoryBackupResource-source-test"
+  );
+  let stagingPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "FormHistoryBackupResource-staging-test"
+  );
+
+  // Make sure this file exists in the source directory, otherwise
+  // BackupResource will skip attempting to back it up.
+  await createTestFiles(sourcePath, [{ path: "formhistory.sqlite" }]);
+
+  // We have no need to test that Sqlite.sys.mjs's backup method is working -
+  // this is something that is tested in Sqlite's own tests. We can just make
+  // sure that it's being called using sinon. Unfortunately, we cannot do the
+  // same thing with IOUtils.copy, as its methods are not stubbable.
+  let fakeConnection = {
+    backup: sandbox.stub().resolves(true),
+    close: sandbox.stub().resolves(true),
+  };
+  sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
+
+  let manifestEntry = await formHistoryBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.equal(
+    manifestEntry,
+    null,
+    "FormHistoryBackupResource.backup should return null as its ManifestEntry"
+  );
+
+  // Next, we'll make sure that the Sqlite connection had `backup` called on it
+  // with the right arguments.
+  Assert.ok(
+    fakeConnection.backup.calledOnce,
+    "Called backup the expected number of times for all connections"
+  );
+  Assert.ok(
+    fakeConnection.backup.calledWith(
+      PathUtils.join(stagingPath, "formhistory.sqlite")
+    ),
+    "Called backup on the formhistory.sqlite Sqlite connection"
+  );
+
+  await maybeRemovePath(stagingPath);
+  await maybeRemovePath(sourcePath);
+
+  sandbox.restore();
+});
+
+/**
+ * Test that the recover method correctly copies items from the recovery
+ * directory into the destination profile directory.
+ */
+add_task(async function test_recover() {
+  let formHistoryBackupResource = new FormHistoryBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "FormHistoryBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "FormHistoryBackupResource-test-profile"
+  );
+
+  const simpleCopyFiles = [{ path: "formhistory.sqlite" }];
+  await createTestFiles(recoveryPath, simpleCopyFiles);
+
+  // The backup method is expected to have returned a null ManifestEntry
+  let postRecoveryEntry = await formHistoryBackupResource.recover(
+    null /* manifestEntry */,
+    recoveryPath,
+    destProfilePath
+  );
+  Assert.equal(
+    postRecoveryEntry,
+    null,
+    "FormHistoryBackupResource.recover should return null as its post " +
+      "recovery entry"
+  );
+
+  await assertFilesExist(destProfilePath, simpleCopyFiles);
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+});
diff --git a/browser/components/backup/tests/xpcshell/test_MiscDataBackupResource.js b/browser/components/backup/tests/xpcshell/test_MiscDataBackupResource.js
index e57dd50cd3..ab63b65332 100644
--- a/browser/components/backup/tests/xpcshell/test_MiscDataBackupResource.js
+++ b/browser/components/backup/tests/xpcshell/test_MiscDataBackupResource.js
@@ -7,20 +7,27 @@ const { MiscDataBackupResource } = ChromeUtils.importESModule(
   "resource:///modules/backup/MiscDataBackupResource.sys.mjs"
 );
 
+const { ActivityStreamStorage } = ChromeUtils.importESModule(
+  "resource://activity-stream/lib/ActivityStreamStorage.sys.mjs"
+);
+
+const { ProfileAge } = ChromeUtils.importESModule(
+  "resource://gre/modules/ProfileAge.sys.mjs"
+);
+
 /**
  * Tests that we can measure miscellaneous files in the profile directory.
  */
 add_task(async function test_measure() {
   Services.fog.testResetFOG();
 
-  const EXPECTED_MISC_KILOBYTES_SIZE = 241;
+  const EXPECTED_MISC_KILOBYTES_SIZE = 231;
   const tempDir = await IOUtils.createUniqueDirectory(
     PathUtils.tempDir,
     "MiscDataBackupResource-measurement-test"
   );
 
   const mockFiles = [
-    { path: "times.json", sizeInKB: 5 },
     { path: "enumerate_devices.txt", sizeInKB: 1 },
     { path: "protections.sqlite", sizeInKB: 100 },
     { path: "SiteSecurityServiceState.bin", sizeInKB: 10 },
@@ -69,12 +76,16 @@ add_task(async function test_backup() {
   );
 
   const simpleCopyFiles = [
-    { path: "times.json" },
     { path: "enumerate_devices.txt" },
     { path: "SiteSecurityServiceState.bin" },
   ];
   await createTestFiles(sourcePath, simpleCopyFiles);
 
+  // Create our fake database files. We don't expect this to be copied to the
+  // staging directory in this test due to our stubbing of the backup method, so
+  // we don't include it in `simpleCopyFiles`.
+  await createTestFiles(sourcePath, [{ path: "protections.sqlite" }]);
+
   // We have no need to test that Sqlite.sys.mjs's backup method is working -
   // this is something that is tested in Sqlite's own tests. We can just make
   // sure that it's being called using sinon. Unfortunately, we cannot do the
@@ -85,7 +96,27 @@ add_task(async function test_backup() {
   };
   sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
 
-  await miscDataBackupResource.backup(stagingPath, sourcePath);
+  let snippetsTableStub = {
+    getAllKeys: sandbox.stub().resolves(["key1", "key2"]),
+    get: sandbox.stub().callsFake(key => {
+      return { key: `value for ${key}` };
+    }),
+  };
+
+  sandbox
+    .stub(ActivityStreamStorage.prototype, "getDbTable")
+    .withArgs("snippets")
+    .resolves(snippetsTableStub);
+
+  let manifestEntry = await miscDataBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.equal(
+    manifestEntry,
+    null,
+    "MiscDataBackupResource.backup should return null as its ManifestEntry"
+  );
 
   await assertFilesExist(stagingPath, simpleCopyFiles);
 
@@ -102,12 +133,170 @@ add_task(async function test_backup() {
     "Called backup on the protections.sqlite Sqlite connection"
   );
 
-  // Bug 1890585 - we don't currently have the ability to copy the
-  // chrome-privileged IndexedDB databases under storage/permanent/chrome, so
-  // we'll just skip testing that for now.
+  // Bug 1890585 - we don't currently have the generalized ability to copy the
+  // chrome-privileged IndexedDB databases under storage/permanent/chrome, but
+  // we do support copying individual IndexedDB databases by manually exporting
+  // and re-importing their contents.
+  let snippetsBackupPath = PathUtils.join(
+    stagingPath,
+    "activity-stream-snippets.json"
+  );
+  Assert.ok(
+    await IOUtils.exists(snippetsBackupPath),
+    "The activity-stream-snippets.json file should exist"
+  );
+  let snippetsBackupContents = await IOUtils.readJSON(snippetsBackupPath);
+  Assert.deepEqual(
+    snippetsBackupContents,
+    {
+      key1: { key: "value for key1" },
+      key2: { key: "value for key2" },
+    },
+    "The contents of the activity-stream-snippets.json file should be as expected"
+  );
 
   await maybeRemovePath(stagingPath);
   await maybeRemovePath(sourcePath);
 
   sandbox.restore();
 });
+
+/**
+ * Test that the recover method correctly copies items from the recovery
+ * directory into the destination profile directory.
+ */
+add_task(async function test_recover() {
+  let miscBackupResource = new MiscDataBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "MiscDataBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "MiscDataBackupResource-test-profile"
+  );
+
+  // Write a dummy times.json into the xpcshell test profile directory. We
+  // expect it to be copied into the destination profile.
+  let originalProfileAge = await ProfileAge(PathUtils.profileDir);
+  await originalProfileAge.computeAndPersistCreated();
+  Assert.ok(
+    await IOUtils.exists(PathUtils.join(PathUtils.profileDir, "times.json"))
+  );
+
+  const simpleCopyFiles = [
+    { path: "enumerate_devices.txt" },
+    { path: "protections.sqlite" },
+    { path: "SiteSecurityServiceState.bin" },
+  ];
+  await createTestFiles(recoveryPath, simpleCopyFiles);
+
+  const SNIPPETS_BACKUP_FILE = "activity-stream-snippets.json";
+
+  // We'll also separately create the activity-stream-snippets.json file, which
+  // is not expected to be copied into the profile directory, but is expected
+  // to exist in the recovery path.
+  await createTestFiles(recoveryPath, [{ path: SNIPPETS_BACKUP_FILE }]);
+
+  // The backup method is expected to have returned a null ManifestEntry
+  let postRecoveryEntry = await miscBackupResource.recover(
+    null /* manifestEntry */,
+    recoveryPath,
+    destProfilePath
+  );
+  Assert.deepEqual(
+    postRecoveryEntry,
+    {
+      snippetsBackupFile: PathUtils.join(recoveryPath, SNIPPETS_BACKUP_FILE),
+    },
+    "MiscDataBackupResource.recover should return the snippets backup data " +
+      "path as its post recovery entry"
+  );
+
+  await assertFilesExist(destProfilePath, simpleCopyFiles);
+
+  // The activity-stream-snippets.json path should _not_ have been written to
+  // the profile path.
+  Assert.ok(
+    !(await IOUtils.exists(
+      PathUtils.join(destProfilePath, SNIPPETS_BACKUP_FILE)
+    )),
+    "Snippets backup data should not have gone into the profile directory"
+  );
+
+  // The times.json file should have been copied over and a backup recovery
+  // time written into it.
+  Assert.ok(
+    await IOUtils.exists(PathUtils.join(destProfilePath, "times.json"))
+  );
+  let copiedProfileAge = await ProfileAge(destProfilePath);
+  Assert.equal(
+    await originalProfileAge.created,
+    await copiedProfileAge.created,
+    "Created timestamp should match."
+  );
+  Assert.equal(
+    await originalProfileAge.firstUse,
+    await copiedProfileAge.firstUse,
+    "First use timestamp should match."
+  );
+  Assert.ok(
+    await copiedProfileAge.recoveredFromBackup,
+    "Backup recovery timestamp should have been set."
+  );
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+});
+
+/**
+ * Test that the postRecovery method correctly writes the snippets backup data
+ * into the snippets IndexedDB table.
+ */
+add_task(async function test_postRecovery() {
+  let sandbox = sinon.createSandbox();
+
+  let fakeProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "MiscDataBackupResource-test-profile"
+  );
+  let fakeSnippetsData = {
+    key1: "value1",
+    key2: "value2",
+  };
+  const SNIPPEST_BACKUP_FILE = PathUtils.join(
+    fakeProfilePath,
+    "activity-stream-snippets.json"
+  );
+
+  await IOUtils.writeJSON(SNIPPEST_BACKUP_FILE, fakeSnippetsData);
+
+  let snippetsTableStub = {
+    set: sandbox.stub(),
+  };
+
+  sandbox
+    .stub(ActivityStreamStorage.prototype, "getDbTable")
+    .withArgs("snippets")
+    .resolves(snippetsTableStub);
+
+  let miscBackupResource = new MiscDataBackupResource();
+  await miscBackupResource.postRecovery({
+    snippetsBackupFile: SNIPPEST_BACKUP_FILE,
+  });
+
+  Assert.ok(
+    snippetsTableStub.set.calledTwice,
+    "The snippets table's set method was called twice"
+  );
+  Assert.ok(
+    snippetsTableStub.set.firstCall.calledWith("key1", "value1"),
+    "The snippets table's set method was called with the first key-value pair"
+  );
+  Assert.ok(
+    snippetsTableStub.set.secondCall.calledWith("key2", "value2"),
+    "The snippets table's set method was called with the second key-value pair"
+  );
+
+  sandbox.restore();
+});
diff --git a/browser/components/backup/tests/xpcshell/test_PlacesBackupResource.js b/browser/components/backup/tests/xpcshell/test_PlacesBackupResource.js
index de97281372..7248a5c614 100644
--- a/browser/components/backup/tests/xpcshell/test_PlacesBackupResource.js
+++ b/browser/components/backup/tests/xpcshell/test_PlacesBackupResource.js
@@ -3,6 +3,9 @@ https://creativecommons.org/publicdomain/zero/1.0/ */
 
 "use strict";
 
+const { BookmarkJSONUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/BookmarkJSONUtils.sys.mjs"
+);
 const { PlacesBackupResource } = ChromeUtils.importESModule(
   "resource:///modules/backup/PlacesBackupResource.sys.mjs"
 );
@@ -93,13 +96,28 @@ add_task(async function test_backup() {
     "PlacesBackupResource-staging-test"
   );
 
+  // Make sure these files exist in the source directory, otherwise
+  // BackupResource will skip attempting to back them up.
+  await createTestFiles(sourcePath, [
+    { path: "places.sqlite" },
+    { path: "favicons.sqlite" },
+  ]);
+
   let fakeConnection = {
     backup: sandbox.stub().resolves(true),
     close: sandbox.stub().resolves(true),
   };
   sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
 
-  await placesBackupResource.backup(stagingPath, sourcePath);
+  let manifestEntry = await placesBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.equal(
+    manifestEntry,
+    null,
+    "PlacesBackupResource.backup should return null as its ManifestEntry"
+  );
 
   Assert.ok(
     fakeConnection.backup.calledTwice,
@@ -154,7 +172,16 @@ add_task(async function test_backup_no_saved_history() {
   Services.prefs.setBoolPref(HISTORY_ENABLED_PREF, false);
   Services.prefs.setBoolPref(SANITIZE_ON_SHUTDOWN_PREF, false);
 
-  await placesBackupResource.backup(stagingPath, sourcePath);
+  let manifestEntry = await placesBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.deepEqual(
+    manifestEntry,
+    { bookmarksOnly: true },
+    "Should have gotten back a ManifestEntry indicating that we only copied " +
+      "bookmarks"
+  );
 
   Assert.ok(
     fakeConnection.backup.notCalled,
@@ -171,7 +198,13 @@ add_task(async function test_backup_no_saved_history() {
   Services.prefs.setBoolPref(SANITIZE_ON_SHUTDOWN_PREF, true);
 
   fakeConnection.backup.resetHistory();
-  await placesBackupResource.backup(stagingPath, sourcePath);
+  manifestEntry = await placesBackupResource.backup(stagingPath, sourcePath);
+  Assert.deepEqual(
+    manifestEntry,
+    { bookmarksOnly: true },
+    "Should have gotten back a ManifestEntry indicating that we only copied " +
+      "bookmarks"
+  );
 
   Assert.ok(
     fakeConnection.backup.notCalled,
@@ -211,7 +244,16 @@ add_task(async function test_backup_private_browsing() {
   sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
   sandbox.stub(PrivateBrowsingUtils, "permanentPrivateBrowsing").value(true);
 
-  await placesBackupResource.backup(stagingPath, sourcePath);
+  let manifestEntry = await placesBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.deepEqual(
+    manifestEntry,
+    { bookmarksOnly: true },
+    "Should have gotten back a ManifestEntry indicating that we only copied " +
+      "bookmarks"
+  );
 
   Assert.ok(
     fakeConnection.backup.notCalled,
@@ -224,3 +266,104 @@ add_task(async function test_backup_private_browsing() {
 
   sandbox.restore();
 });
+
+/**
+ * Test that the recover method correctly copies places.sqlite and favicons.sqlite
+ * from the recovery directory into the destination profile directory.
+ */
+add_task(async function test_recover() {
+  let placesBackupResource = new PlacesBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "PlacesBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "PlacesBackupResource-test-profile"
+  );
+
+  const simpleCopyFiles = [
+    { path: "places.sqlite" },
+    { path: "favicons.sqlite" },
+  ];
+  await createTestFiles(recoveryPath, simpleCopyFiles);
+
+  // The backup method is expected to have returned a null ManifestEntry
+  let postRecoveryEntry = await placesBackupResource.recover(
+    null /* manifestEntry */,
+    recoveryPath,
+    destProfilePath
+  );
+  Assert.equal(
+    postRecoveryEntry,
+    null,
+    "PlacesBackupResource.recover should return null as its post recovery entry"
+  );
+
+  await assertFilesExist(destProfilePath, simpleCopyFiles);
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+});
+
+/**
+ * Test that the recover method correctly copies bookmarks.jsonlz4 from the recovery
+ * directory into the destination profile directory.
+ */
+add_task(async function test_recover_bookmarks_only() {
+  let sandbox = sinon.createSandbox();
+  let placesBackupResource = new PlacesBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "PlacesBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "PlacesBackupResource-test-profile"
+  );
+  let bookmarksImportStub = sandbox
+    .stub(BookmarkJSONUtils, "importFromFile")
+    .resolves(true);
+
+  await createTestFiles(recoveryPath, [{ path: "bookmarks.jsonlz4" }]);
+
+  // The backup method is expected to detect bookmarks import only
+  let postRecoveryEntry = await placesBackupResource.recover(
+    { bookmarksOnly: true },
+    recoveryPath,
+    destProfilePath
+  );
+
+  let expectedBookmarksPath = PathUtils.join(recoveryPath, "bookmarks.jsonlz4");
+
+  // Expect the bookmarks backup file path to be passed from recover()
+  Assert.deepEqual(
+    postRecoveryEntry,
+    { bookmarksBackupPath: expectedBookmarksPath },
+    "PlacesBackupResource.recover should return the expected post recovery entry"
+  );
+
+  // Ensure that files stored in a places backup are not copied to the new profile during recovery
+  for (let placesFile of [
+    "places.sqlite",
+    "favicons.sqlite",
+    "bookmarks.jsonlz4",
+  ]) {
+    Assert.ok(
+      !(await IOUtils.exists(PathUtils.join(destProfilePath, placesFile))),
+      `${placesFile} should not exist in the new profile`
+    );
+  }
+
+  // Now pretend that BackupService called the postRecovery method
+  await placesBackupResource.postRecovery(postRecoveryEntry);
+  Assert.ok(
+    bookmarksImportStub.calledOnce,
+    "BookmarkJSONUtils.importFromFile was called in the postRecovery step"
+  );
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+
+  sandbox.restore();
+});
diff --git a/browser/components/backup/tests/xpcshell/test_PreferencesBackupResource.js b/browser/components/backup/tests/xpcshell/test_PreferencesBackupResource.js
index 6845431bb8..2075b57e91 100644
--- a/browser/components/backup/tests/xpcshell/test_PreferencesBackupResource.js
+++ b/browser/components/backup/tests/xpcshell/test_PreferencesBackupResource.js
@@ -86,6 +86,14 @@ add_task(async function test_backup() {
   ];
   await createTestFiles(sourcePath, simpleCopyFiles);
 
+  // Create our fake database files. We don't expect these to be copied to the
+  // staging directory in this test due to our stubbing of the backup method, so
+  // we don't include it in `simpleCopyFiles`.
+  await createTestFiles(sourcePath, [
+    { path: "permissions.sqlite" },
+    { path: "content-prefs.sqlite" },
+  ]);
+
   // We have no need to test that Sqlite.sys.mjs's backup method is working -
   // this is something that is tested in Sqlite's own tests. We can just make
   // sure that it's being called using sinon. Unfortunately, we cannot do the
@@ -96,7 +104,15 @@ add_task(async function test_backup() {
   };
   sandbox.stub(Sqlite, "openConnection").returns(fakeConnection);
 
-  await preferencesBackupResource.backup(stagingPath, sourcePath);
+  let manifestEntry = await preferencesBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.equal(
+    manifestEntry,
+    null,
+    "PreferencesBackupResource.backup should return null as its ManifestEntry"
+  );
 
   await assertFilesExist(stagingPath, simpleCopyFiles);
 
@@ -130,3 +146,51 @@ add_task(async function test_backup() {
 
   sandbox.restore();
 });
+
+/**
+ * Test that the recover method correctly copies items from the recovery
+ * directory into the destination profile directory.
+ */
+add_task(async function test_recover() {
+  let preferencesBackupResource = new PreferencesBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "PreferencesBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "PreferencesBackupResource-test-profile"
+  );
+
+  const simpleCopyFiles = [
+    { path: "prefs.js" },
+    { path: "xulstore.json" },
+    { path: "permissions.sqlite" },
+    { path: "content-prefs.sqlite" },
+    { path: "containers.json" },
+    { path: "handlers.json" },
+    { path: "search.json.mozlz4" },
+    { path: "user.js" },
+    { path: ["chrome", "userChrome.css"] },
+    { path: ["chrome", "userContent.css"] },
+    { path: ["chrome", "childFolder", "someOtherStylesheet.css"] },
+  ];
+  await createTestFiles(recoveryPath, simpleCopyFiles);
+
+  // The backup method is expected to have returned a null ManifestEntry
+  let postRecoveryEntry = await preferencesBackupResource.recover(
+    null /* manifestEntry */,
+    recoveryPath,
+    destProfilePath
+  );
+  Assert.equal(
+    postRecoveryEntry,
+    null,
+    "PreferencesBackupResource.recover should return null as its post recovery entry"
+  );
+
+  await assertFilesExist(destProfilePath, simpleCopyFiles);
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+});
diff --git a/browser/components/backup/tests/xpcshell/test_SessionStoreBackupResource.js b/browser/components/backup/tests/xpcshell/test_SessionStoreBackupResource.js
new file mode 100644
index 0000000000..d57f2d3a25
--- /dev/null
+++ b/browser/components/backup/tests/xpcshell/test_SessionStoreBackupResource.js
@@ -0,0 +1,209 @@
+/* Any copyright is dedicated to the Public Domain.
+https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { SessionStoreBackupResource } = ChromeUtils.importESModule(
+  "resource:///modules/backup/SessionStoreBackupResource.sys.mjs"
+);
+const { SessionStore } = ChromeUtils.importESModule(
+  "resource:///modules/sessionstore/SessionStore.sys.mjs"
+);
+
+/**
+ * Tests that we can measure the Session Store JSON and backups directory.
+ */
+add_task(async function test_measure() {
+  const EXPECTED_KILOBYTES_FOR_BACKUPS_DIR = 1000;
+  Services.fog.testResetFOG();
+
+  // Create the sessionstore-backups directory.
+  let tempDir = PathUtils.tempDir;
+  let sessionStoreBackupsPath = PathUtils.join(
+    tempDir,
+    "sessionstore-backups",
+    "restore.jsonlz4"
+  );
+  await createKilobyteSizedFile(
+    sessionStoreBackupsPath,
+    EXPECTED_KILOBYTES_FOR_BACKUPS_DIR
+  );
+
+  let sessionStoreBackupResource = new SessionStoreBackupResource();
+  await sessionStoreBackupResource.measure(tempDir);
+
+  let sessionStoreBackupsDirectoryMeasurement =
+    Glean.browserBackup.sessionStoreBackupsDirectorySize.testGetValue();
+  let sessionStoreMeasurement =
+    Glean.browserBackup.sessionStoreSize.testGetValue();
+  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
+
+  // Compare glean vs telemetry measurements
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.session_store_backups_directory_size",
+    sessionStoreBackupsDirectoryMeasurement,
+    "Glean and telemetry measurements for session store backups directory should be equal"
+  );
+  TelemetryTestUtils.assertScalar(
+    scalars,
+    "browser.backup.session_store_size",
+    sessionStoreMeasurement,
+    "Glean and telemetry measurements for session store should be equal"
+  );
+
+  // Compare glean measurements vs actual file sizes
+  Assert.equal(
+    sessionStoreBackupsDirectoryMeasurement,
+    EXPECTED_KILOBYTES_FOR_BACKUPS_DIR,
+    "Should have collected the correct glean measurement for the sessionstore-backups directory"
+  );
+
+  // Session store measurement is from `getCurrentState`, so exact size is unknown.
+  Assert.greater(
+    sessionStoreMeasurement,
+    0,
+    "Should have collected a measurement for the session store"
+  );
+
+  await IOUtils.remove(sessionStoreBackupsPath);
+});
+
+/**
+ * Test that the backup method correctly copies items from the profile directory
+ * into the staging directory.
+ */
+add_task(async function test_backup() {
+  let sandbox = sinon.createSandbox();
+
+  let sessionStoreBackupResource = new SessionStoreBackupResource();
+  let sourcePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "SessionStoreBackupResource-source-test"
+  );
+  let stagingPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "SessionStoreBackupResource-staging-test"
+  );
+
+  const simpleCopyFiles = [
+    { path: ["sessionstore-backups", "test-sessionstore-backup.jsonlz4"] },
+    { path: ["sessionstore-backups", "test-sessionstore-recovery.baklz4"] },
+  ];
+  await createTestFiles(sourcePath, simpleCopyFiles);
+
+  let sessionStoreState = SessionStore.getCurrentState(true);
+  let manifestEntry = await sessionStoreBackupResource.backup(
+    stagingPath,
+    sourcePath
+  );
+  Assert.equal(
+    manifestEntry,
+    null,
+    "SessionStoreBackupResource.backup should return null as its ManifestEntry"
+  );
+
+  /**
+   * We don't expect the actual file sessionstore.jsonlz4 to exist in the profile directory before calling the backup method.
+   * Instead, verify that it is created by the backup method and exists in the staging folder right after.
+   */
+  await assertFilesExist(stagingPath, [
+    ...simpleCopyFiles,
+    { path: "sessionstore.jsonlz4" },
+  ]);
+
+  /**
+   * Do a deep comparison between the recorded session state before backup and the file made in the staging folder
+   * to verify that information about session state was correctly written for backup.
+   */
+  let sessionStoreStateStaged = await IOUtils.readJSON(
+    PathUtils.join(stagingPath, "sessionstore.jsonlz4"),
+    { decompress: true }
+  );
+
+  /**
+   * These timestamps might be slightly different from one another, so we'll exclude
+   * them from the comparison.
+   */
+  delete sessionStoreStateStaged.session.lastUpdate;
+  delete sessionStoreState.session.lastUpdate;
+  Assert.deepEqual(
+    sessionStoreStateStaged,
+    sessionStoreState,
+    "sessionstore.jsonlz4 in the staging folder matches the recorded session state"
+  );
+
+  await maybeRemovePath(stagingPath);
+  await maybeRemovePath(sourcePath);
+
+  sandbox.restore();
+});
+
+/**
+ * Test that the recover method correctly copies items from the recovery
+ * directory into the destination profile directory.
+ */
+add_task(async function test_recover() {
+  let sessionStoreBackupResource = new SessionStoreBackupResource();
+  let recoveryPath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "SessionStoreBackupResource-recovery-test"
+  );
+  let destProfilePath = await IOUtils.createUniqueDirectory(
+    PathUtils.tempDir,
+    "SessionStoreBackupResource-test-profile"
+  );
+
+  const simpleCopyFiles = [
+    { path: ["sessionstore-backups", "test-sessionstore-backup.jsonlz4"] },
+    { path: ["sessionstore-backups", "test-sessionstore-recovery.baklz4"] },
+  ];
+  await createTestFiles(recoveryPath, simpleCopyFiles);
+
+  // We backup a copy of sessionstore.jsonlz4, so ensure it exists in the recovery path
+  let sessionStoreState = SessionStore.getCurrentState(true);
+  let sessionStoreBackupPath = PathUtils.join(
+    recoveryPath,
+    "sessionstore.jsonlz4"
+  );
+  await IOUtils.writeJSON(sessionStoreBackupPath, sessionStoreState, {
+    compress: true,
+  });
+
+  // The backup method is expected to have returned a null ManifestEntry
+  let postRecoveryEntry = await sessionStoreBackupResource.recover(
+    null /* manifestEntry */,
+    recoveryPath,
+    destProfilePath
+  );
+  Assert.equal(
+    postRecoveryEntry,
+    null,
+    "SessionStoreBackupResource.recover should return null as its post recovery entry"
+  );
+
+  await assertFilesExist(destProfilePath, [
+    ...simpleCopyFiles,
+    { path: "sessionstore.jsonlz4" },
+  ]);
+
+  let sessionStateCopied = await IOUtils.readJSON(
+    PathUtils.join(destProfilePath, "sessionstore.jsonlz4"),
+    { decompress: true }
+  );
+
+  /**
+   * These timestamps might be slightly different from one another, so we'll exclude
+   * them from the comparison.
+   */
+  delete sessionStateCopied.session.lastUpdate;
+  delete sessionStoreState.session.lastUpdate;
+  Assert.deepEqual(
+    sessionStateCopied,
+    sessionStoreState,
+    "sessionstore.jsonlz4 in the destination profile folder matches the backed up session state"
+  );
+
+  await maybeRemovePath(recoveryPath);
+  await maybeRemovePath(destProfilePath);
+});
diff --git a/browser/components/backup/tests/xpcshell/test_createBackup.js b/browser/components/backup/tests/xpcshell/test_createBackup.js
deleted file mode 100644
index fcace695ef..0000000000
--- a/browser/components/backup/tests/xpcshell/test_createBackup.js
+++ /dev/null
@@ -1,74 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-https://creativecommons.org/publicdomain/zero/1.0/ */
-
-"use strict";
-
-/**
- * Tests that calling BackupService.createBackup will call backup on each
- * registered BackupResource, and that each BackupResource will have a folder
- * created for them to write into.
- */
-add_task(async function test_createBackup() {
-  let sandbox = sinon.createSandbox();
-  sandbox
-    .stub(FakeBackupResource1.prototype, "backup")
-    .resolves({ fake1: "hello from 1" });
-  sandbox
-    .stub(FakeBackupResource2.prototype, "backup")
-    .rejects(new Error("Some failure to backup"));
-  sandbox
-    .stub(FakeBackupResource3.prototype, "backup")
-    .resolves({ fake3: "hello from 3" });
-
-  let bs = new BackupService({
-    FakeBackupResource1,
-    FakeBackupResource2,
-    FakeBackupResource3,
-  });
-
-  let fakeProfilePath = await IOUtils.createUniqueDirectory(
-    PathUtils.tempDir,
-    "createBackupTest"
-  );
-
-  await bs.createBackup({ profilePath: fakeProfilePath });
-
-  // For now, we expect a staging folder to exist under the fakeProfilePath,
-  // and we should find a folder for each fake BackupResource.
-  let stagingPath = PathUtils.join(fakeProfilePath, "backups", "staging");
-  Assert.ok(await IOUtils.exists(stagingPath), "Staging folder exists");
-
-  for (let backupResourceClass of [
-    FakeBackupResource1,
-    FakeBackupResource2,
-    FakeBackupResource3,
-  ]) {
-    let expectedResourceFolder = PathUtils.join(
-      stagingPath,
-      backupResourceClass.key
-    );
-    Assert.ok(
-      await IOUtils.exists(expectedResourceFolder),
-      `BackupResource staging folder exists for ${backupResourceClass.key}`
-    );
-    Assert.ok(
-      backupResourceClass.prototype.backup.calledOnce,
-      `Backup was called for ${backupResourceClass.key}`
-    );
-    Assert.ok(
-      backupResourceClass.prototype.backup.calledWith(
-        expectedResourceFolder,
-        fakeProfilePath
-      ),
-      `Backup was passed the right paths for ${backupResourceClass.key}`
-    );
-  }
-
-  // After createBackup is more fleshed out, we're going to want to make sure
-  // that we're writing the manifest file and that it contains the expected
-  // ManifestEntry objects, and that the staging folder was successfully
-  // renamed with the current date.
-  await IOUtils.remove(fakeProfilePath, { recursive: true });
-
-  sandbox.restore();
-});
diff --git a/browser/components/backup/tests/xpcshell/test_measurements.js b/browser/components/backup/tests/xpcshell/test_measurements.js
deleted file mode 100644
index 0dece6b370..0000000000
--- a/browser/components/backup/tests/xpcshell/test_measurements.js
+++ /dev/null
@@ -1,577 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-http://creativecommons.org/publicdomain/zero/1.0/ */
-
-"use strict";
-
-const { CredentialsAndSecurityBackupResource } = ChromeUtils.importESModule(
-  "resource:///modules/backup/CredentialsAndSecurityBackupResource.sys.mjs"
-);
-const { AddonsBackupResource } = ChromeUtils.importESModule(
-  "resource:///modules/backup/AddonsBackupResource.sys.mjs"
-);
-const { CookiesBackupResource } = ChromeUtils.importESModule(
-  "resource:///modules/backup/CookiesBackupResource.sys.mjs"
-);
-
-const { FormHistoryBackupResource } = ChromeUtils.importESModule(
-  "resource:///modules/backup/FormHistoryBackupResource.sys.mjs"
-);
-
-const { SessionStoreBackupResource } = ChromeUtils.importESModule(
-  "resource:///modules/backup/SessionStoreBackupResource.sys.mjs"
-);
-
-add_setup(() => {
-  // FOG needs to be initialized in order for data to flow.
-  Services.fog.initializeFOG();
-  Services.telemetry.clearScalars();
-});
-
-/**
- * Tests that calling `BackupService.takeMeasurements` will call the measure
- * method of all registered BackupResource classes.
- */
-add_task(async function test_takeMeasurements() {
-  let sandbox = sinon.createSandbox();
-  sandbox.stub(FakeBackupResource1.prototype, "measure").resolves();
-  sandbox
-    .stub(FakeBackupResource2.prototype, "measure")
-    .rejects(new Error("Some failure to measure"));
-
-  let bs = new BackupService({ FakeBackupResource1, FakeBackupResource2 });
-  await bs.takeMeasurements();
-
-  for (let backupResourceClass of [FakeBackupResource1, FakeBackupResource2]) {
-    Assert.ok(
-      backupResourceClass.prototype.measure.calledOnce,
-      "Measure was called"
-    );
-    Assert.ok(
-      backupResourceClass.prototype.measure.calledWith(PathUtils.profileDir),
-      "Measure was called with the profile directory argument"
-    );
-  }
-
-  sandbox.restore();
-});
-
-/**
- * Tests that we can measure the disk space available in the profile directory.
- */
-add_task(async function test_profDDiskSpace() {
-  let bs = new BackupService();
-  await bs.takeMeasurements();
-  let measurement = Glean.browserBackup.profDDiskSpace.testGetValue();
-  TelemetryTestUtils.assertScalar(
-    TelemetryTestUtils.getProcessScalars("parent", false, true),
-    "browser.backup.prof_d_disk_space",
-    measurement
-  );
-
-  Assert.greater(
-    measurement,
-    0,
-    "Should have collected a measurement for the profile directory storage " +
-      "device"
-  );
-});
-
-/**
- * Tests that we can measure credentials related files in the profile directory.
- */
-add_task(async function test_credentialsAndSecurityBackupResource() {
-  Services.fog.testResetFOG();
-
-  const EXPECTED_CREDENTIALS_KILOBYTES_SIZE = 413;
-  const EXPECTED_SECURITY_KILOBYTES_SIZE = 231;
-
-  // Create resource files in temporary directory
-  const tempDir = await IOUtils.createUniqueDirectory(
-    PathUtils.tempDir,
-    "CredentialsAndSecurityBackupResource-measurement-test"
-  );
-
-  const mockFiles = [
-    // Set up credentials files
-    { path: "key4.db", sizeInKB: 300 },
-    { path: "logins.json", sizeInKB: 1 },
-    { path: "logins-backup.json", sizeInKB: 1 },
-    { path: "autofill-profiles.json", sizeInKB: 1 },
-    { path: "credentialstate.sqlite", sizeInKB: 100 },
-    { path: "signedInUser.json", sizeInKB: 5 },
-    // Set up security files
-    { path: "cert9.db", sizeInKB: 230 },
-    { path: "pkcs11.txt", sizeInKB: 1 },
-  ];
-
-  await createTestFiles(tempDir, mockFiles);
-
-  let credentialsAndSecurityBackupResource =
-    new CredentialsAndSecurityBackupResource();
-  await credentialsAndSecurityBackupResource.measure(tempDir);
-
-  let credentialsMeasurement =
-    Glean.browserBackup.credentialsDataSize.testGetValue();
-  let securityMeasurement = Glean.browserBackup.securityDataSize.testGetValue();
-  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
-
-  // Credentials measurements
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.credentials_data_size",
-    credentialsMeasurement,
-    "Glean and telemetry measurements for credentials data should be equal"
-  );
-
-  Assert.equal(
-    credentialsMeasurement,
-    EXPECTED_CREDENTIALS_KILOBYTES_SIZE,
-    "Should have collected the correct glean measurement for credentials files"
-  );
-
-  // Security measurements
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.security_data_size",
-    securityMeasurement,
-    "Glean and telemetry measurements for security data should be equal"
-  );
-  Assert.equal(
-    securityMeasurement,
-    EXPECTED_SECURITY_KILOBYTES_SIZE,
-    "Should have collected the correct glean measurement for security files"
-  );
-
-  // Cleanup
-  await maybeRemovePath(tempDir);
-});
-
-/**
- * Tests that we can measure the Cookies db in a profile directory.
- */
-add_task(async function test_cookiesBackupResource() {
-  const EXPECTED_COOKIES_DB_SIZE = 1230;
-
-  Services.fog.testResetFOG();
-
-  // Create resource files in temporary directory
-  let tempDir = PathUtils.tempDir;
-  let tempCookiesDBPath = PathUtils.join(tempDir, "cookies.sqlite");
-  await createKilobyteSizedFile(tempCookiesDBPath, EXPECTED_COOKIES_DB_SIZE);
-
-  let cookiesBackupResource = new CookiesBackupResource();
-  await cookiesBackupResource.measure(tempDir);
-
-  let cookiesMeasurement = Glean.browserBackup.cookiesSize.testGetValue();
-  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
-
-  // Compare glean vs telemetry measurements
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.cookies_size",
-    cookiesMeasurement,
-    "Glean and telemetry measurements for cookies.sqlite should be equal"
-  );
-
-  // Compare glean measurements vs actual file sizes
-  Assert.equal(
-    cookiesMeasurement,
-    EXPECTED_COOKIES_DB_SIZE,
-    "Should have collected the correct glean measurement for cookies.sqlite"
-  );
-
-  await maybeRemovePath(tempCookiesDBPath);
-});
-
-/**
- * Tests that we can measure the Form History db in a profile directory.
- */
-add_task(async function test_formHistoryBackupResource() {
-  const EXPECTED_FORM_HISTORY_DB_SIZE = 500;
-
-  Services.fog.testResetFOG();
-
-  // Create resource files in temporary directory
-  let tempDir = PathUtils.tempDir;
-  let tempFormHistoryDBPath = PathUtils.join(tempDir, "formhistory.sqlite");
-  await createKilobyteSizedFile(
-    tempFormHistoryDBPath,
-    EXPECTED_FORM_HISTORY_DB_SIZE
-  );
-
-  let formHistoryBackupResource = new FormHistoryBackupResource();
-  await formHistoryBackupResource.measure(tempDir);
-
-  let formHistoryMeasurement =
-    Glean.browserBackup.formHistorySize.testGetValue();
-  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
-
-  // Compare glean vs telemetry measurements
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.form_history_size",
-    formHistoryMeasurement,
-    "Glean and telemetry measurements for formhistory.sqlite should be equal"
-  );
-
-  // Compare glean measurements vs actual file sizes
-  Assert.equal(
-    formHistoryMeasurement,
-    EXPECTED_FORM_HISTORY_DB_SIZE,
-    "Should have collected the correct glean measurement for formhistory.sqlite"
-  );
-
-  await IOUtils.remove(tempFormHistoryDBPath);
-});
-
-/**
- * Tests that we can measure the Session Store JSON and backups directory.
- */
-add_task(async function test_sessionStoreBackupResource() {
-  const EXPECTED_KILOBYTES_FOR_BACKUPS_DIR = 1000;
-  Services.fog.testResetFOG();
-
-  // Create the sessionstore-backups directory.
-  let tempDir = PathUtils.tempDir;
-  let sessionStoreBackupsPath = PathUtils.join(
-    tempDir,
-    "sessionstore-backups",
-    "restore.jsonlz4"
-  );
-  await createKilobyteSizedFile(
-    sessionStoreBackupsPath,
-    EXPECTED_KILOBYTES_FOR_BACKUPS_DIR
-  );
-
-  let sessionStoreBackupResource = new SessionStoreBackupResource();
-  await sessionStoreBackupResource.measure(tempDir);
-
-  let sessionStoreBackupsDirectoryMeasurement =
-    Glean.browserBackup.sessionStoreBackupsDirectorySize.testGetValue();
-  let sessionStoreMeasurement =
-    Glean.browserBackup.sessionStoreSize.testGetValue();
-  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
-
-  // Compare glean vs telemetry measurements
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.session_store_backups_directory_size",
-    sessionStoreBackupsDirectoryMeasurement,
-    "Glean and telemetry measurements for session store backups directory should be equal"
-  );
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.session_store_size",
-    sessionStoreMeasurement,
-    "Glean and telemetry measurements for session store should be equal"
-  );
-
-  // Compare glean measurements vs actual file sizes
-  Assert.equal(
-    sessionStoreBackupsDirectoryMeasurement,
-    EXPECTED_KILOBYTES_FOR_BACKUPS_DIR,
-    "Should have collected the correct glean measurement for the sessionstore-backups directory"
-  );
-
-  // Session store measurement is from `getCurrentState`, so exact size is unknown.
-  Assert.greater(
-    sessionStoreMeasurement,
-    0,
-    "Should have collected a measurement for the session store"
-  );
-
-  await IOUtils.remove(sessionStoreBackupsPath);
-});
-
-/**
- * Tests that we can measure the size of all the addons & extensions data.
- */
-add_task(async function test_AddonsBackupResource() {
-  Services.fog.testResetFOG();
-  Services.telemetry.clearScalars();
-
-  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON = 250;
-  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORE = 500;
-  const EXPECTED_KILOBYTES_FOR_STORAGE_SYNC = 50;
-  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_A = 600;
-  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_B = 400;
-  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_C = 150;
-  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_DIRECTORY = 1000;
-  const EXPECTED_KILOBYTES_FOR_EXTENSION_DATA = 100;
-  const EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORAGE = 200;
-
-  let tempDir = PathUtils.tempDir;
-
-  // Create extensions json files (all the same size).
-  const extensionsFilePath = PathUtils.join(tempDir, "extensions.json");
-  await createKilobyteSizedFile(
-    extensionsFilePath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON
-  );
-  const extensionSettingsFilePath = PathUtils.join(
-    tempDir,
-    "extension-settings.json"
-  );
-  await createKilobyteSizedFile(
-    extensionSettingsFilePath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON
-  );
-  const extensionsPrefsFilePath = PathUtils.join(
-    tempDir,
-    "extension-preferences.json"
-  );
-  await createKilobyteSizedFile(
-    extensionsPrefsFilePath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON
-  );
-  const addonStartupFilePath = PathUtils.join(tempDir, "addonStartup.json.lz4");
-  await createKilobyteSizedFile(
-    addonStartupFilePath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON
-  );
-
-  // Create the extension store permissions data file.
-  let extensionStorePermissionsDataSize = PathUtils.join(
-    tempDir,
-    "extension-store-permissions",
-    "data.safe.bin"
-  );
-  await createKilobyteSizedFile(
-    extensionStorePermissionsDataSize,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORE
-  );
-
-  // Create the storage sync database file.
-  let storageSyncPath = PathUtils.join(tempDir, "storage-sync-v2.sqlite");
-  await createKilobyteSizedFile(
-    storageSyncPath,
-    EXPECTED_KILOBYTES_FOR_STORAGE_SYNC
-  );
-
-  // Create the extensions directory with XPI files.
-  let extensionsXpiAPath = PathUtils.join(
-    tempDir,
-    "extensions",
-    "extension-b.xpi"
-  );
-  let extensionsXpiBPath = PathUtils.join(
-    tempDir,
-    "extensions",
-    "extension-a.xpi"
-  );
-  await createKilobyteSizedFile(
-    extensionsXpiAPath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_A
-  );
-  await createKilobyteSizedFile(
-    extensionsXpiBPath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_B
-  );
-  // Should be ignored.
-  let extensionsXpiStagedPath = PathUtils.join(
-    tempDir,
-    "extensions",
-    "staged",
-    "staged-test-extension.xpi"
-  );
-  let extensionsXpiTrashPath = PathUtils.join(
-    tempDir,
-    "extensions",
-    "trash",
-    "trashed-test-extension.xpi"
-  );
-  let extensionsXpiUnpackedPath = PathUtils.join(
-    tempDir,
-    "extensions",
-    "unpacked-extension.xpi",
-    "manifest.json"
-  );
-  await createKilobyteSizedFile(
-    extensionsXpiStagedPath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_C
-  );
-  await createKilobyteSizedFile(
-    extensionsXpiTrashPath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_C
-  );
-  await createKilobyteSizedFile(
-    extensionsXpiUnpackedPath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_XPI_C
-  );
-
-  // Create the browser extension data directory.
-  let browserExtensionDataPath = PathUtils.join(
-    tempDir,
-    "browser-extension-data",
-    "test-file"
-  );
-  await createKilobyteSizedFile(
-    browserExtensionDataPath,
-    EXPECTED_KILOBYTES_FOR_EXTENSION_DATA
-  );
-
-  // Create the extensions storage directory.
-  let extensionsStoragePath = PathUtils.join(
-    tempDir,
-    "storage",
-    "default",
-    "moz-extension+++test-extension-id",
-    "idb",
-    "data.sqlite"
-  );
-  // Other storage files that should not be counted.
-  let otherStoragePath = PathUtils.join(
-    tempDir,
-    "storage",
-    "default",
-    "https+++accounts.firefox.com",
-    "ls",
-    "data.sqlite"
-  );
-
-  await createKilobyteSizedFile(
-    extensionsStoragePath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORAGE
-  );
-  await createKilobyteSizedFile(
-    otherStoragePath,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORAGE
-  );
-
-  // Measure all the extensions data.
-  let extensionsBackupResource = new AddonsBackupResource();
-  await extensionsBackupResource.measure(tempDir);
-
-  let extensionsJsonSizeMeasurement =
-    Glean.browserBackup.extensionsJsonSize.testGetValue();
-  Assert.equal(
-    extensionsJsonSizeMeasurement,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_JSON * 4, // There are 4 equally sized files.
-    "Should have collected the correct measurement of the total size of all extensions JSON files"
-  );
-
-  let extensionStorePermissionsDataSizeMeasurement =
-    Glean.browserBackup.extensionStorePermissionsDataSize.testGetValue();
-  Assert.equal(
-    extensionStorePermissionsDataSizeMeasurement,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORE,
-    "Should have collected the correct measurement of the size of the extension store permissions data"
-  );
-
-  let storageSyncSizeMeasurement =
-    Glean.browserBackup.storageSyncSize.testGetValue();
-  Assert.equal(
-    storageSyncSizeMeasurement,
-    EXPECTED_KILOBYTES_FOR_STORAGE_SYNC,
-    "Should have collected the correct measurement of the size of the storage sync database"
-  );
-
-  let extensionsXpiDirectorySizeMeasurement =
-    Glean.browserBackup.extensionsXpiDirectorySize.testGetValue();
-  Assert.equal(
-    extensionsXpiDirectorySizeMeasurement,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_DIRECTORY,
-    "Should have collected the correct measurement of the size 2 equally sized XPI files in the extensions directory"
-  );
-
-  let browserExtensionDataSizeMeasurement =
-    Glean.browserBackup.browserExtensionDataSize.testGetValue();
-  Assert.equal(
-    browserExtensionDataSizeMeasurement,
-    EXPECTED_KILOBYTES_FOR_EXTENSION_DATA,
-    "Should have collected the correct measurement of the size of the browser extension data directory"
-  );
-
-  let extensionsStorageSizeMeasurement =
-    Glean.browserBackup.extensionsStorageSize.testGetValue();
-  Assert.equal(
-    extensionsStorageSizeMeasurement,
-    EXPECTED_KILOBYTES_FOR_EXTENSIONS_STORAGE,
-    "Should have collected the correct measurement of all the extensions storage"
-  );
-
-  // Compare glean vs telemetry measurements
-  let scalars = TelemetryTestUtils.getProcessScalars("parent", false, false);
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.extensions_json_size",
-    extensionsJsonSizeMeasurement,
-    "Glean and telemetry measurements for extensions JSON should be equal"
-  );
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.extension_store_permissions_data_size",
-    extensionStorePermissionsDataSizeMeasurement,
-    "Glean and telemetry measurements for extension store permissions data should be equal"
-  );
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.storage_sync_size",
-    storageSyncSizeMeasurement,
-    "Glean and telemetry measurements for storage sync database should be equal"
-  );
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.extensions_xpi_directory_size",
-    extensionsXpiDirectorySizeMeasurement,
-    "Glean and telemetry measurements for extensions directory should be equal"
-  );
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.browser_extension_data_size",
-    browserExtensionDataSizeMeasurement,
-    "Glean and telemetry measurements for browser extension data should be equal"
-  );
-  TelemetryTestUtils.assertScalar(
-    scalars,
-    "browser.backup.extensions_storage_size",
-    extensionsStorageSizeMeasurement,
-    "Glean and telemetry measurements for extensions storage should be equal"
-  );
-
-  await maybeRemovePath(tempDir);
-});
-
-/**
- * Tests that we can handle the extension store permissions data not existing.
- */
-add_task(
-  async function test_AddonsBackupResource_no_extension_store_permissions_data() {
-    Services.fog.testResetFOG();
-
-    let tempDir = PathUtils.tempDir;
-
-    let extensionsBackupResource = new AddonsBackupResource();
-    await extensionsBackupResource.measure(tempDir);
-
-    let extensionStorePermissionsDataSizeMeasurement =
-      Glean.browserBackup.extensionStorePermissionsDataSize.testGetValue();
-    Assert.equal(
-      extensionStorePermissionsDataSizeMeasurement,
-      null,
-      "Should NOT have collected a measurement for the missing data"
-    );
-  }
-);
-
-/**
- * Tests that we can handle a profile with no moz-extension IndexedDB databases.
- */
-add_task(
-  async function test_AddonsBackupResource_no_extension_storage_databases() {
-    Services.fog.testResetFOG();
-
-    let tempDir = PathUtils.tempDir;
-
-    let extensionsBackupResource = new AddonsBackupResource();
-    await extensionsBackupResource.measure(tempDir);
-
-    let extensionsStorageSizeMeasurement =
-      Glean.browserBackup.extensionsStorageSize.testGetValue();
-    Assert.equal(
-      extensionsStorageSizeMeasurement,
-      null,
-      "Should NOT have collected a measurement for the missing data"
-    );
-  }
-);
diff --git a/browser/components/backup/tests/xpcshell/xpcshell.toml b/browser/components/backup/tests/xpcshell/xpcshell.toml
index 07e517f1f2..8a41c9e761 100644
--- a/browser/components/backup/tests/xpcshell/xpcshell.toml
+++ b/browser/components/backup/tests/xpcshell/xpcshell.toml
@@ -6,15 +6,25 @@ prefs = [
   "browser.backup.log=true",
 ]
 
+["test_AddonsBackupResource.js"]
+
 ["test_BackupResource.js"]
 support-files = ["data/test_xulstore.json"]
 
+["test_BackupService.js"]
+
+["test_BackupService_takeMeasurements.js"]
+
+["test_CookiesBackupResource.js"]
+
+["test_CredentialsAndSecurityBackupResource.js"]
+
+["test_FormHistoryBackupResource.js"]
+
 ["test_MiscDataBackupResource.js"]
 
 ["test_PlacesBackupResource.js"]
 
 ["test_PreferencesBackupResource.js"]
 
-["test_createBackup.js"]
-
-["test_measurements.js"]
+["test_SessionStoreBackupResource.js"]