Adding upstream version 124.0.1.upstream/124.0.1

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

9 files changed, 730 insertions, 0 deletions

diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser.toml b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser.toml
new file mode 100644
index 0000000000..1c44d7804e
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser.toml
@@ -0,0 +1,20 @@
+[DEFAULT]
+head = "head.js"
+prefs = [
+  "privacy.bounceTrackingProtection.enabled=true",
+  "privacy.bounceTrackingProtection.enableTestMode=true",
+  "privacy.bounceTrackingProtection.bounceTrackingPurgeTimerPeriodSec=0",
+]
+support-files = [
+  "file_start.html",
+  "file_bounce.sjs",
+  "file_bounce.html",
+]
+
+["browser_bouncetracking_oa_isolation.js"]
+
+["browser_bouncetracking_purge.js"]
+
+["browser_bouncetracking_simple.js"]
+
+["browser_bouncetracking_stateful.js"]
diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_oa_isolation.js b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_oa_isolation.js
new file mode 100644
index 0000000000..12c2c943dd
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_oa_isolation.js
@@ -0,0 +1,73 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["privacy.bounceTrackingProtection.requireStatefulBounces", true],
+      ["privacy.bounceTrackingProtection.bounceTrackingGracePeriodSec", 0],
+    ],
+  });
+});
+
+// Tests that bounces in PBM don't affect state in normal browsing.
+add_task(async function test_pbm_data_isolated() {
+  await runTestBounce({
+    bounceType: "client",
+    setState: "cookie-client",
+    originAttributes: { privateBrowsingId: 1 },
+    postBounceCallback: () => {
+      // After the PBM bounce assert that we haven't recorded any data for normal browsing.
+      Assert.equal(
+        bounceTrackingProtection.testGetBounceTrackerCandidateHosts({}).length,
+        0,
+        "No bounce tracker candidates for normal browsing."
+      );
+      Assert.equal(
+        bounceTrackingProtection.testGetUserActivationHosts({}).length,
+        0,
+        "No user activations for normal browsing."
+      );
+    },
+  });
+});
+
+// Tests that bounces in PBM don't affect state in normal browsing.
+add_task(async function test_containers_isolated() {
+  await runTestBounce({
+    bounceType: "server",
+    setState: "cookie-server",
+    originAttributes: { userContextId: 2 },
+    postBounceCallback: () => {
+      // After the bounce in the container tab assert that we haven't recorded any data for normal browsing.
+      Assert.equal(
+        bounceTrackingProtection.testGetBounceTrackerCandidateHosts({}).length,
+        0,
+        "No bounce tracker candidates for normal browsing."
+      );
+      Assert.equal(
+        bounceTrackingProtection.testGetUserActivationHosts({}).length,
+        0,
+        "No user activations for normal browsing."
+      );
+
+      // Or in another container tab.
+      Assert.equal(
+        bounceTrackingProtection.testGetBounceTrackerCandidateHosts({
+          userContextId: 1,
+        }).length,
+        0,
+        "No bounce tracker candidates for container tab 1."
+      );
+      Assert.equal(
+        bounceTrackingProtection.testGetUserActivationHosts({
+          userContextId: 1,
+        }).length,
+        0,
+        "No user activations for container tab 1."
+      );
+    },
+  });
+});
diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_purge.js b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_purge.js
new file mode 100644
index 0000000000..a8e98b80f0
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_purge.js
@@ -0,0 +1,121 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const BOUNCE_TRACKING_GRACE_PERIOD_SEC = 30;
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      [
+        "privacy.bounceTrackingProtection.bounceTrackingGracePeriodSec",
+        BOUNCE_TRACKING_GRACE_PERIOD_SEC,
+      ],
+      ["privacy.bounceTrackingProtection.requireStatefulBounces", false],
+    ],
+  });
+});
+
+/**
+ * The following tests ensure that sites that have open tabs are exempt from purging.
+ */
+
+function initBounceTrackerState() {
+  bounceTrackingProtection.clearAll();
+
+  // Bounce time of 1 is out of the grace period which means we should purge.
+  bounceTrackingProtection.testAddBounceTrackerCandidate({}, "example.com", 1);
+  bounceTrackingProtection.testAddBounceTrackerCandidate({}, "example.net", 1);
+
+  // Should not purge because within grace period.
+  let timestampWithinGracePeriod =
+    Date.now() - (BOUNCE_TRACKING_GRACE_PERIOD_SEC * 1000) / 2;
+  bounceTrackingProtection.testAddBounceTrackerCandidate(
+    {},
+    "example.org",
+    timestampWithinGracePeriod * 1000
+  );
+}
+
+add_task(async function test_purging_skip_open_foreground_tab() {
+  initBounceTrackerState();
+
+  // Foreground tab
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "https://example.com"
+  );
+  Assert.deepEqual(
+    await bounceTrackingProtection.testRunPurgeBounceTrackers(),
+    ["example.net"],
+    "Should only purge example.net. example.org is within the grace period, example.com has an open tab."
+  );
+
+  info("Close the tab for example.com and test that it gets purged now.");
+  initBounceTrackerState();
+
+  BrowserTestUtils.removeTab(tab);
+  Assert.deepEqual(
+    (await bounceTrackingProtection.testRunPurgeBounceTrackers()).sort(),
+    ["example.net", "example.com"].sort(),
+    "example.com should have been purged now that it no longer has an open tab."
+  );
+
+  bounceTrackingProtection.clearAll();
+});
+
+add_task(async function test_purging_skip_open_background_tab() {
+  initBounceTrackerState();
+
+  // Background tab
+  let tab = BrowserTestUtils.addTab(gBrowser, "https://example.com");
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+  Assert.deepEqual(
+    await bounceTrackingProtection.testRunPurgeBounceTrackers(),
+    ["example.net"],
+    "Should only purge example.net. example.org is within the grace period, example.com has an open tab."
+  );
+
+  info("Close the tab for example.com and test that it gets purged now.");
+  initBounceTrackerState();
+
+  BrowserTestUtils.removeTab(tab);
+  Assert.deepEqual(
+    (await bounceTrackingProtection.testRunPurgeBounceTrackers()).sort(),
+    ["example.net", "example.com"].sort(),
+    "example.com should have been purged now that it no longer has an open tab."
+  );
+
+  bounceTrackingProtection.clearAll();
+});
+
+add_task(async function test_purging_skip_open_tab_extra_window() {
+  initBounceTrackerState();
+
+  // Foreground tab in new window.
+  let win = await BrowserTestUtils.openNewBrowserWindow({});
+  await BrowserTestUtils.openNewForegroundTab(
+    win.gBrowser,
+    "https://example.com"
+  );
+  Assert.deepEqual(
+    await bounceTrackingProtection.testRunPurgeBounceTrackers(),
+    ["example.net"],
+    "Should only purge example.net. example.org is within the grace period, example.com has an open tab."
+  );
+
+  info(
+    "Close the window with the tab for example.com and test that it gets purged now."
+  );
+  initBounceTrackerState();
+
+  await BrowserTestUtils.closeWindow(win);
+  Assert.deepEqual(
+    (await bounceTrackingProtection.testRunPurgeBounceTrackers()).sort(),
+    ["example.net", "example.com"].sort(),
+    "example.com should have been purged now that it no longer has an open tab."
+  );
+
+  bounceTrackingProtection.clearAll();
+});
diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_simple.js b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_simple.js
new file mode 100644
index 0000000000..dfbd4d0fc0
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_simple.js
@@ -0,0 +1,89 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["privacy.bounceTrackingProtection.requireStatefulBounces", false],
+      ["privacy.bounceTrackingProtection.bounceTrackingGracePeriodSec", 0],
+    ],
+  });
+});
+
+// Tests a stateless bounce via client redirect.
+add_task(async function test_client_bounce_simple() {
+  await runTestBounce({ bounceType: "client" });
+});
+
+// Tests a stateless bounce via server redirect.
+add_task(async function test_server_bounce_simple() {
+  await runTestBounce({ bounceType: "server" });
+});
+
+// Tests a chained redirect consisting of a server and a client redirect.
+add_task(async function test_bounce_chain() {
+  Assert.equal(
+    bounceTrackingProtection.testGetBounceTrackerCandidateHosts({}).length,
+    0,
+    "No bounce tracker hosts initially."
+  );
+  Assert.equal(
+    bounceTrackingProtection.testGetUserActivationHosts({}).length,
+    0,
+    "No user activation hosts initially."
+  );
+
+  await BrowserTestUtils.withNewTab(
+    getBaseUrl(ORIGIN_A) + "file_start.html",
+    async browser => {
+      let promiseRecordBounces = waitForRecordBounces(browser);
+
+      // The final destination after the bounces.
+      let targetURL = new URL(getBaseUrl(ORIGIN_B) + "file_start.html");
+
+      // Construct last hop.
+      let bounceChainUrlEnd = getBounceURL({ bounceType: "server", targetURL });
+      // Construct first hop, nesting last hop.
+      let bounceChainUrlFull = getBounceURL({
+        bounceType: "client",
+        redirectDelayMS: 100,
+        bounceOrigin: ORIGIN_TRACKER_B,
+        targetURL: bounceChainUrlEnd,
+      });
+
+      info("bounceChainUrl: " + bounceChainUrlFull.href);
+
+      // Navigate through the bounce chain.
+      await navigateLinkClick(browser, bounceChainUrlFull);
+
+      // Wait for the final site to be loaded which complete the BounceTrackingRecord.
+      await BrowserTestUtils.browserLoaded(browser, false, targetURL);
+
+      // Navigate again with user gesture which triggers
+      // BounceTrackingProtection::RecordStatefulBounces. We could rely on the
+      // timeout (mClientBounceDetectionTimeout) here but that can cause races
+      // in debug where the load is quite slow.
+      await navigateLinkClick(
+        browser,
+        new URL(getBaseUrl(ORIGIN_C) + "file_start.html")
+      );
+
+      await promiseRecordBounces;
+
+      Assert.deepEqual(
+        bounceTrackingProtection.testGetBounceTrackerCandidateHosts({}).sort(),
+        [SITE_TRACKER_B, SITE_TRACKER].sort(),
+        `Identified all bounce trackers in the redirect chain.`
+      );
+      Assert.deepEqual(
+        bounceTrackingProtection.testGetUserActivationHosts({}).sort(),
+        [SITE_A, SITE_B].sort(),
+        "Should only have user activation for sites where we clicked links."
+      );
+
+      bounceTrackingProtection.clearAll();
+    }
+  );
+});
diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_stateful.js b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_stateful.js
new file mode 100644
index 0000000000..e7fb4521a7
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/browser_bouncetracking_stateful.js
@@ -0,0 +1,63 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+let bounceTrackingProtection;
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["privacy.bounceTrackingProtection.requireStatefulBounces", true],
+      ["privacy.bounceTrackingProtection.bounceTrackingGracePeriodSec", 0],
+    ],
+  });
+  bounceTrackingProtection = Cc[
+    "@mozilla.org/bounce-tracking-protection;1"
+  ].getService(Ci.nsIBounceTrackingProtection);
+});
+
+// Cookie tests.
+
+add_task(async function test_bounce_stateful_cookies_client() {
+  info("Test client bounce with cookie.");
+  await runTestBounce({
+    bounceType: "client",
+    setState: "cookie-client",
+  });
+  info("Test client bounce without cookie.");
+  await runTestBounce({
+    bounceType: "client",
+    setState: null,
+    expectCandidate: false,
+    expectPurge: false,
+  });
+});
+
+add_task(async function test_bounce_stateful_cookies_server() {
+  info("Test server bounce with cookie.");
+  await runTestBounce({
+    bounceType: "server",
+    setState: "cookie-server",
+  });
+  info("Test server bounce without cookie.");
+  await runTestBounce({
+    bounceType: "server",
+    setState: null,
+    expectCandidate: false,
+    expectPurge: false,
+  });
+});
+
+// Storage tests.
+
+// TODO: Bug 1848406: Implement stateful bounce detection for localStorage.
+add_task(async function test_bounce_stateful_localStorage() {
+  info("TODO: client bounce with localStorage.");
+  await runTestBounce({
+    bounceType: "client",
+    setState: "localStorage",
+    expectCandidate: false,
+    expectPurge: false,
+  });
+});
diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_bounce.html b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_bounce.html
new file mode 100644
index 0000000000..2756555fa5
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_bounce.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+    <title>Bounce!</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+  </head>
+  <body>
+    <p>Nothing to see here...</p>
+    <script>
+      // Wrap the entire block so we can run async code.
+      (async () => {
+        let url = new URL(location.href);
+
+        let redirectDelay = url.searchParams.get("redirectDelay");
+        if(redirectDelay != null) {
+          redirectDelay = Number.parseInt(redirectDelay);
+        } else {
+          redirectDelay = 50;
+        }
+
+        let setState = url.searchParams.get("setState");
+        if (setState) {
+          let id = Math.random().toString();
+
+          if (setState == "cookie-client") {
+            let cookie = document.cookie;
+
+            if (cookie) {
+              console.info("Received cookie", cookie);
+            } else {
+              let newCookie = `id=${id}`;
+              console.info("Setting new cookie", newCookie);
+              document.cookie = newCookie;
+            }
+          } else if (setState == "localStorage") {
+            let entry = localStorage.getItem("id");
+
+            if (entry) {
+              console.info("Found localStorage entry. id", entry);
+            } else {
+              console.info("Setting new localStorage entry. id", id);
+              localStorage.setItem(id, id);
+            }
+          }
+        }
+
+        let target = url.searchParams.get("target");
+        if (target) {
+          console.info("redirecting to", target);
+          setTimeout(() => {
+            location.href = target;
+          }, redirectDelay);
+        }
+      })();
+    </script>
+  </body>
+</html>
diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_bounce.sjs b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_bounce.sjs
new file mode 100644
index 0000000000..5e948a899b
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_bounce.sjs
@@ -0,0 +1,19 @@
+function handleRequest(request, response) {
+  response.setHeader("Cache-Control", "no-cache", false);
+
+  let query = new URLSearchParams(request.queryString);
+
+  let setState = query.get("setState");
+  if (setState == "cookie-server") {
+    response.setHeader("Set-Cookie", "foo=bar");
+  }
+
+  let statusCode = 302;
+  let statusCodeQuery = query.get("statusCode");
+  if (statusCodeQuery) {
+    statusCode = Number.parseInt(statusCodeQuery);
+  }
+
+  response.setStatusLine("1.1", statusCode, "Found");
+  response.setHeader("Location", query.get("target"), false);
+}
diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_start.html b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_start.html
new file mode 100644
index 0000000000..ded691023b
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/file_start.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+    <title>Blank</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+  </head>
+  <body>
+  </body>
+</html>
diff --git a/toolkit/components/antitracking/bouncetrackingprotection/test/browser/head.js b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/head.js
new file mode 100644
index 0000000000..f5857b6919
--- /dev/null
+++ b/toolkit/components/antitracking/bouncetrackingprotection/test/browser/head.js
@@ -0,0 +1,275 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const SITE_A = "example.com";
+const ORIGIN_A = `https://${SITE_A}`;
+
+const SITE_B = "example.org";
+const ORIGIN_B = `https://${SITE_B}`;
+
+const SITE_C = "example.net";
+const ORIGIN_C = `https://${SITE_C}`;
+
+const SITE_TRACKER = "itisatracker.org";
+const ORIGIN_TRACKER = `https://${SITE_TRACKER}`;
+
+const SITE_TRACKER_B = "trackertest.org";
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+const ORIGIN_TRACKER_B = `http://${SITE_TRACKER_B}`;
+
+// Test message used for observing when the record-bounces method in
+// BounceTrackingProtection.cpp has finished.
+const OBSERVER_MSG_RECORD_BOUNCES_FINISHED = "test-record-bounces-finished";
+
+const ROOT_DIR = getRootDirectory(gTestPath);
+
+XPCOMUtils.defineLazyServiceGetter(
+  this,
+  "bounceTrackingProtection",
+  "@mozilla.org/bounce-tracking-protection;1",
+  "nsIBounceTrackingProtection"
+);
+
+/**
+ * Get the base url for the current test directory using the given origin.
+ * @param {string} origin - Origin to use in URL.
+ * @returns {string} - Generated URL as a string.
+ */
+function getBaseUrl(origin) {
+  return ROOT_DIR.replace("chrome://mochitests/content", origin);
+}
+
+/**
+ * Constructs a url for an intermediate "bounce" hop which represents a tracker.
+ * @param {*} options - URL generation options.
+ * @param {('server'|'client')} options.bounceType - Redirect type to use for
+ * the bounce.
+ * @param {string} [options.bounceOrigin] - The origin of the bounce URL.
+ * @param {string} [options.targetURL] - URL to redirect to after the bounce.
+ * @param {("cookie"|null)} [options.setState] - What type of state should be set during
+ * the bounce. No state by default.
+ * @param {number} [options.statusCode] - HTTP status code to use for server
+ * side redirect. Only applies to bounceType == "server".
+ * @param {number} [options.redirectDelayMS] - How long to wait before
+ * redirecting. Only applies to bounceType == "client".
+ * @returns {URL} Generated URL which points to an endpoint performing the
+ * redirect.
+ */
+function getBounceURL({
+  bounceType,
+  bounceOrigin = ORIGIN_TRACKER,
+  targetURL = new URL(getBaseUrl(ORIGIN_B) + "file_start.html"),
+  setState = null,
+  statusCode = 302,
+  redirectDelayMS = 50,
+}) {
+  if (!["server", "client"].includes(bounceType)) {
+    throw new Error("Invalid bounceType");
+  }
+
+  let bounceFile =
+    bounceType == "client" ? "file_bounce.html" : "file_bounce.sjs";
+
+  let bounceUrl = new URL(getBaseUrl(bounceOrigin) + bounceFile);
+
+  let { searchParams } = bounceUrl;
+  searchParams.set("target", targetURL.href);
+  if (setState) {
+    searchParams.set("setState", setState);
+  }
+
+  if (bounceType == "server") {
+    searchParams.set("statusCode", statusCode);
+  } else if (bounceType == "client") {
+    searchParams.set("redirectDelay", redirectDelayMS);
+  }
+
+  return bounceUrl;
+}
+
+/**
+ * Insert an <a href/> element with the given target and perform a synthesized
+ * click on it.
+ * @param {MozBrowser} browser - Browser to insert the link in.
+ * @param {URL} targetURL - Destination for navigation.
+ * @returns {Promise} Resolves once the click is done. Does not wait for
+ * navigation or load.
+ */
+async function navigateLinkClick(browser, targetURL) {
+  await SpecialPowers.spawn(browser, [targetURL.href], targetURL => {
+    let link = content.document.createElement("a");
+
+    link.href = targetURL;
+    link.textContent = targetURL;
+    // The link needs display: block, otherwise synthesizeMouseAtCenter doesn't
+    // hit it.
+    link.style.display = "block";
+
+    content.document.body.appendChild(link);
+  });
+
+  await BrowserTestUtils.synthesizeMouseAtCenter("a[href]", {}, browser);
+}
+
+/**
+ * Wait for the record-bounces method to run for the given tab / browser.
+ * @param {browser} browser - Browser element which represents the tab we want
+ * to observe.
+ * @returns {Promise} Promise which resolves once the record-bounces method has
+ * run for the given browser.
+ */
+async function waitForRecordBounces(browser) {
+  return TestUtils.topicObserved(
+    OBSERVER_MSG_RECORD_BOUNCES_FINISHED,
+    subject => {
+      // Ensure the message was dispatched for the browser we're interested in.
+      let propBag = subject.QueryInterface(Ci.nsIPropertyBag2);
+      let browserId = propBag.getProperty("browserId");
+      return browser.browsingContext.browserId == browserId;
+    }
+  );
+}
+
+/**
+ * Test helper which loads an initial blank page, then navigates to a url which
+ * performs a bounce. Checks that the bounce hosts are properly identified as
+ * trackers.
+ * @param {object} options - Test Options.
+ * @param {('server'|'client')} options.bounceType - Whether to perform a client
+ * or server side redirect.
+ * @param {('cookie-server'|'cookie-client'|'localStorage')} [options.setState]
+ * Type of state to set during the redirect. Defaults to non stateful redirect.
+ * @param {boolean} [options.expectCandidate=true] - Expect the redirecting site to be
+ * identified as a bounce tracker (candidate).
+ * @param {boolean} [options.expectPurge=true] - Expect the redirecting site to have
+ * its storage purged.
+ * @param {OriginAttributes} [options.originAttributes={}] - Origin attributes
+ * to use for the test. This determines whether the test is run in normal
+ * browsing, a private window or a container tab. By default the test is run
+ * in normal browsing.
+ * @param {function} [options.postBounceCallback] - Optional function to run after the
+ * bounce has completed.
+ */
+async function runTestBounce(options = {}) {
+  let {
+    bounceType,
+    setState = null,
+    expectCandidate = true,
+    expectPurge = true,
+    originAttributes = {},
+    postBounceCallback = () => {},
+  } = options;
+  info(`runTestBounce ${JSON.stringify(options)}`);
+
+  Assert.equal(
+    bounceTrackingProtection.testGetBounceTrackerCandidateHosts(
+      originAttributes
+    ).length,
+    0,
+    "No bounce tracker hosts initially."
+  );
+  Assert.equal(
+    bounceTrackingProtection.testGetUserActivationHosts(originAttributes)
+      .length,
+    0,
+    "No user activation hosts initially."
+  );
+
+  let win = window;
+  let { privateBrowsingId, userContextId } = originAttributes;
+  let usePrivateWindow =
+    privateBrowsingId != null &&
+    privateBrowsingId !=
+      Services.scriptSecurityManager.DEFAULT_PRIVATE_BROWSING_ID;
+  if (userContextId != null && userContextId > 0 && usePrivateWindow) {
+    throw new Error("userContextId is not supported in private windows");
+  }
+
+  if (usePrivateWindow) {
+    win = await BrowserTestUtils.openNewBrowserWindow({ private: true });
+  }
+
+  let tab = win.gBrowser.addTab(getBaseUrl(ORIGIN_A) + "file_start.html", {
+    triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+    userContextId,
+  });
+  win.gBrowser.selectedTab = tab;
+
+  let browser = tab.linkedBrowser;
+  await BrowserTestUtils.browserLoaded(browser);
+
+  let promiseRecordBounces = waitForRecordBounces(browser);
+
+  // The final destination after the bounce.
+  let targetURL = new URL(getBaseUrl(ORIGIN_B) + "file_start.html");
+
+  // Navigate through the bounce chain.
+  await navigateLinkClick(
+    browser,
+    getBounceURL({ bounceType, targetURL, setState })
+  );
+
+  // Wait for the final site to be loaded which complete the BounceTrackingRecord.
+  await BrowserTestUtils.browserLoaded(browser, false, targetURL);
+
+  // Navigate again with user gesture which triggers
+  // BounceTrackingProtection::RecordStatefulBounces. We could rely on the
+  // timeout (mClientBounceDetectionTimeout) here but that can cause races
+  // in debug where the load is quite slow.
+  await navigateLinkClick(
+    browser,
+    new URL(getBaseUrl(ORIGIN_C) + "file_start.html")
+  );
+
+  await promiseRecordBounces;
+
+  Assert.deepEqual(
+    bounceTrackingProtection.testGetBounceTrackerCandidateHosts(
+      originAttributes
+    ),
+    expectCandidate ? [SITE_TRACKER] : [],
+    `Should ${
+      expectCandidate ? "" : "not "
+    }have identified ${SITE_TRACKER} as a bounce tracker.`
+  );
+  Assert.deepEqual(
+    bounceTrackingProtection
+      .testGetUserActivationHosts(originAttributes)
+      .sort(),
+    [SITE_A, SITE_B].sort(),
+    "Should only have user activation for sites where we clicked links."
+  );
+
+  // If the caller specified a function to run after the bounce, run it now.
+  await postBounceCallback();
+
+  Assert.deepEqual(
+    await bounceTrackingProtection.testRunPurgeBounceTrackers(),
+    expectPurge ? [SITE_TRACKER] : [],
+    `Should ${expectPurge ? "" : "not "}purge state for ${SITE_TRACKER}.`
+  );
+
+  // Clean up
+  BrowserTestUtils.removeTab(tab);
+  if (usePrivateWindow) {
+    await BrowserTestUtils.closeWindow(win);
+
+    info(
+      "Closing the last PBM window should trigger a purge of all PBM state."
+    );
+    Assert.ok(
+      !bounceTrackingProtection.testGetBounceTrackerCandidateHosts(
+        originAttributes
+      ).length,
+      "No bounce tracker hosts after closing private window."
+    );
+    Assert.ok(
+      !bounceTrackingProtection.testGetUserActivationHosts(originAttributes)
+        .length,
+      "No user activation hosts after closing private window."
+    );
+  }
+  bounceTrackingProtection.clearAll();
+}