Adding upstream version 124.0.1.upstream/124.0.1

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

14 files changed, 1009 insertions, 0 deletions

diff --git a/dom/workers/test/xpcshell/data/base_uri_module.mjs b/dom/workers/test/xpcshell/data/base_uri_module.mjs
new file mode 100644
index 0000000000..7604baed82
--- /dev/null
+++ b/dom/workers/test/xpcshell/data/base_uri_module.mjs
@@ -0,0 +1,23 @@
+// This file is for testing the module loader's path handling.
+// ESLint rules that modifies path shouldn't be applied.
+
+export const obj = {};
+
+export async function doImport() {
+  // This file is loaded as resource://test/data/base_uri_module.mjs
+  // Relative/absolute paths should be resolved based on the URI, instead of
+  // file: path.
+
+  const namespaceWithURI = await import(
+    "resource://test/data/base_uri_module2.mjs"
+  );
+  const namespaceWithCurrentDir = await import("./base_uri_module2.mjs");
+  const namespaceWithParentDir = await import("../data/base_uri_module2.mjs");
+  const namespaceWithAbsoluteDir = await import("/data/base_uri_module2.mjs");
+
+  return {
+    equal1: namespaceWithURI.obj2 == namespaceWithCurrentDir.obj2,
+    equal2: namespaceWithURI.obj2 == namespaceWithParentDir.obj2,
+    equal3: namespaceWithURI.obj2 == namespaceWithAbsoluteDir.obj2,
+  };
+}
diff --git a/dom/workers/test/xpcshell/data/base_uri_module2.mjs b/dom/workers/test/xpcshell/data/base_uri_module2.mjs
new file mode 100644
index 0000000000..2358d27a83
--- /dev/null
+++ b/dom/workers/test/xpcshell/data/base_uri_module2.mjs
@@ -0,0 +1 @@
+export const obj2 = {};
diff --git a/dom/workers/test/xpcshell/data/base_uri_worker.js b/dom/workers/test/xpcshell/data/base_uri_worker.js
new file mode 100644
index 0000000000..74137cc20b
--- /dev/null
+++ b/dom/workers/test/xpcshell/data/base_uri_worker.js
@@ -0,0 +1,27 @@
+// This file is for testing the module loader's path handling.
+// ESLint rules that modifies path shouldn't be applied.
+
+onmessage = async event => {
+  // This file is loaded as resource://test/data/base_uri_worker.js
+  // Relative/absolute paths should be resolved based on the URI, instead of
+  // file: path.
+
+  const namespaceWithURI = await import(
+    "resource://test/data/base_uri_module.mjs"
+  );
+  const namespaceWithCurrentDir = await import("./base_uri_module.mjs");
+  const namespaceWithParentDir = await import("../data/base_uri_module.mjs");
+  const namespaceWithAbsoluteDir = await import("/data/base_uri_module.mjs");
+
+  postMessage({
+    scriptToModule: {
+      equal1: namespaceWithURI.obj == namespaceWithCurrentDir.obj,
+      equal2: namespaceWithURI.obj == namespaceWithParentDir.obj,
+      equal3: namespaceWithURI.obj == namespaceWithAbsoluteDir.obj,
+    },
+    moduleToModuleURI: await namespaceWithURI.doImport(),
+    moduleToModuleCurrent: await namespaceWithCurrentDir.doImport(),
+    moduleToModuleParent: await namespaceWithParentDir.doImport(),
+    moduleToModuleAbsolute: await namespaceWithAbsoluteDir.doImport(),
+  });
+};
diff --git a/dom/workers/test/xpcshell/data/chrome.manifest b/dom/workers/test/xpcshell/data/chrome.manifest
new file mode 100644
index 0000000000..611e81fd4e
--- /dev/null
+++ b/dom/workers/test/xpcshell/data/chrome.manifest
@@ -0,0 +1 @@
+content workers ./
diff --git a/dom/workers/test/xpcshell/data/worker.js b/dom/workers/test/xpcshell/data/worker.js
new file mode 100644
index 0000000000..0a455f51c3
--- /dev/null
+++ b/dom/workers/test/xpcshell/data/worker.js
@@ -0,0 +1,6 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+self.onmessage = function (msg) {
+  self.postMessage("OK");
+};
diff --git a/dom/workers/test/xpcshell/data/worker_fileReader.js b/dom/workers/test/xpcshell/data/worker_fileReader.js
new file mode 100644
index 0000000000..44e7e6499b
--- /dev/null
+++ b/dom/workers/test/xpcshell/data/worker_fileReader.js
@@ -0,0 +1,7 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+self.onmessage = function (msg) {
+  var fr = new FileReader();
+  self.postMessage("OK");
+};
diff --git a/dom/workers/test/xpcshell/test_ext_redirects_sw_scripts.js b/dom/workers/test/xpcshell/test_ext_redirects_sw_scripts.js
new file mode 100644
index 0000000000..3028e5d539
--- /dev/null
+++ b/dom/workers/test/xpcshell/test_ext_redirects_sw_scripts.js
@@ -0,0 +1,558 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+const { TestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/TestUtils.sys.mjs"
+);
+
+const { AddonTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/AddonTestUtils.sys.mjs"
+);
+
+const { ExtensionTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/ExtensionXPCShellUtils.sys.mjs"
+);
+
+const { createHttpServer } = AddonTestUtils;
+
+// Force ServiceWorkerRegistrar to init by calling do_get_profile.
+// (This has to be called before AddonTestUtils.init, because it does
+// also call do_get_profile internally but it doesn't notify
+// profile-after-change).
+do_get_profile(true);
+
+AddonTestUtils.init(this);
+ExtensionTestUtils.init(this);
+
+const server = createHttpServer({ hosts: ["localhost"] });
+
+server.registerPathHandler("/page.html", (request, response) => {
+  info(`/page.html is being requested: ${JSON.stringify(request)}`);
+  response.write(`<!DOCTYPE html>`);
+});
+
+server.registerPathHandler("/sw.js", (request, response) => {
+  info(`/sw.js is being requested: ${JSON.stringify(request)}`);
+  response.setHeader("Content-Type", "application/javascript");
+  response.write(`
+    dump('Executing http://localhost/sw.js\\n');
+    importScripts('sw-imported.js');
+    dump('Executed importScripts from http://localhost/sw.js\\n');
+  `);
+});
+
+server.registerPathHandler("/sw-imported.js", (request, response) => {
+  info(`/sw-imported.js is being requested: ${JSON.stringify(request)}`);
+  response.setHeader("Content-Type", "application/javascript");
+  response.write(`
+    dump('importScript loaded from http://localhost/sw-imported.js\\n');
+    self.onmessage = evt => evt.ports[0].postMessage('original-imported-script');
+  `);
+});
+
+Services.prefs.setBoolPref("dom.serviceWorkers.testing.enabled", true);
+// Make sure this test file doesn't run with the legacy behavior by
+// setting explicitly the expected default value.
+Services.prefs.setBoolPref(
+  "extensions.filterResponseServiceWorkerScript.disabled",
+  false
+);
+Services.prefs.setBoolPref("extensions.dnr.enabled", true);
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref("dom.serviceWorkers.testing.enabled");
+  Services.prefs.clearUserPref(
+    "extensions.filterResponseServiceWorkerScript.disabled"
+  );
+  Services.prefs.clearUserPref("extensions.dnr.enabled");
+});
+
+// Helper function used to be sure to clear any data that a previous test case
+// may have left (e.g. service worker registration, cached service worker
+// scripts).
+//
+// NOTE: Given that xpcshell test are running isolated from each other (unlike
+// mochitests), we can just clear every storage type supported by clear data
+// (instead of cherry picking what we want to clear based on the test cases
+// part of this test file).
+async function ensureDataCleanup() {
+  info("Clear any service worker or data previous test cases may have left");
+  await new Promise(resolve =>
+    Services.clearData.deleteData(Ci.nsIClearDataService.CLEAR_ALL, resolve)
+  );
+}
+
+// Note that the update algorithm (https://w3c.github.io/ServiceWorker/#update-algorithm)
+// builds an "updatedResourceMap" as part of its check process. This means that only a
+// single fetch will be performed for "sw-imported.js" as part of the update check and its
+// resulting install invocation. The installation's call to importScripts when evaluated
+// will load the script directly out of the Cache API.
+function testSWUpdate(contentPage) {
+  return contentPage.spawn([], async () => {
+    const oldReg = await this.content.navigator.serviceWorker.ready;
+    const reg = await oldReg.update();
+    const sw = reg.installing || reg.waiting || reg.active;
+    return new Promise(resolve => {
+      const { MessageChannel } = this.content;
+      const { port1, port2 } = new MessageChannel();
+      port1.onmessage = evt => resolve(evt.data);
+      sw.postMessage("worker-message", [port2]);
+    });
+  });
+}
+
+add_task(async function test_extension_invalid_sw_scripts_redirect_ignored() {
+  const extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      permissions: ["<all_urls>", "webRequest", "webRequestBlocking"],
+      // In this test task, the extension resource is not expected to be
+      // requested at all, so it does not really matter whether the file is
+      // listed in web_accessible_resources. Regardless, add it to make sure
+      // that any load failure is not caused by the lack of being listed here.
+      web_accessible_resources: ["sw-unexpected-redirect.js"],
+    },
+    background() {
+      browser.webRequest.onBeforeRequest.addListener(
+        req => {
+          if (req.url == "http://localhost/sw.js") {
+            const filter = browser.webRequest.filterResponseData(req.requestId);
+            filter.ondata = event => filter.write(event.data);
+            filter.onstop = event => filter.disconnect();
+            filter.onerror = () => {
+              browser.test.sendMessage(
+                "filter-response-error:mainscript",
+                filter.error
+              );
+            };
+            return {
+              redirectUrl: browser.runtime.getURL("sw-unexpected-redirect.js"),
+            };
+          }
+
+          if (req.url == "http://localhost/sw-imported.js") {
+            const filter = browser.webRequest.filterResponseData(req.requestId);
+            filter.ondata = event => filter.write(event.data);
+            filter.onstop = event => filter.disconnect();
+            filter.onerror = () => {
+              browser.test.sendMessage(
+                "filter-response-error:importscript",
+                filter.error
+              );
+            };
+            return { redirectUrl: "about:blank" };
+          }
+
+          return {};
+        },
+        { urls: ["http://localhost/sw.js", "http://localhost/sw-imported.js"] },
+        ["blocking"]
+      );
+    },
+    files: {
+      "sw-unexpected-redirect.js": `
+        dump('main worker redirected to moz-extension://UUID/sw-unexpected-redirect.js\\n');
+        self.onmessage = evt => evt.ports[0].postMessage('sw-unexpected-redirect');
+      `,
+    },
+  });
+
+  // Start the test extension to redirect importScripts requests.
+  await extension.startup();
+
+  function awaitConsoleMessage(regexp) {
+    return new Promise(resolve => {
+      Services.console.registerListener(function listener(message) {
+        if (regexp.test(message.message)) {
+          Services.console.unregisterListener(listener);
+          resolve(message);
+        }
+      });
+    });
+  }
+
+  const awaitIgnoredMainScriptRedirect = awaitConsoleMessage(
+    /Invalid redirectUrl .* on service worker main script/
+  );
+  const awaitIgnoredImportScriptRedirect = awaitConsoleMessage(
+    /Invalid redirectUrl .* on service worker imported script/
+  );
+
+  let contentPage = await ExtensionTestUtils.loadContentPage(
+    "http://localhost/page.html"
+  );
+
+  // Register the worker after loading the test extension, which should not be
+  // able to intercept and redirect the importedScripts requests because of
+  // invalid destinations.
+  info("Register service worker from a content webpage");
+  let workerMessage = await contentPage.spawn([], async () => {
+    const reg = await this.content.navigator.serviceWorker.register("/sw.js");
+    return new Promise(resolve => {
+      const { MessageChannel } = this.content;
+      const { port1, port2 } = new MessageChannel();
+      port1.onmessage = evt => resolve(evt.data);
+      const sw = reg.active || reg.waiting || reg.installing;
+      sw.postMessage("worker-message", [port2]);
+    });
+  });
+
+  equal(
+    workerMessage,
+    "original-imported-script",
+    "Got expected worker reply (importScripts not intercepted)"
+  );
+
+  info("Wait for the expected error message on main script redirect");
+  const errorMsg = await awaitIgnoredMainScriptRedirect;
+  ok(errorMsg?.message, `Got error message: ${errorMsg?.message}`);
+  ok(
+    errorMsg?.message?.includes(extension.id),
+    "error message should include the addon id"
+  );
+  ok(
+    errorMsg?.message?.includes("http://localhost/sw.js"),
+    "error message should include the sw main script url"
+  );
+
+  info("Wait for the expected error message on import script redirect");
+  const errorMsg2 = await awaitIgnoredImportScriptRedirect;
+  ok(errorMsg2?.message, `Got error message: ${errorMsg2?.message}`);
+  ok(
+    errorMsg2?.message?.includes(extension.id),
+    "error message should include the addon id"
+  );
+  ok(
+    errorMsg2?.message?.includes("http://localhost/sw-imported.js"),
+    "error message should include the sw main script url"
+  );
+
+  info("Wait filterResponse error on main script");
+  equal(
+    await extension.awaitMessage("filter-response-error:mainscript"),
+    "Invalid request ID",
+    "Got expected error on main script"
+  );
+  info("Wait filterResponse error on import script");
+  equal(
+    await extension.awaitMessage("filter-response-error:importscript"),
+    "Invalid request ID",
+    "Got expected error on import script"
+  );
+
+  await extension.unload();
+  await contentPage.close();
+});
+
+add_task(async function test_filter_sw_script() {
+  const extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      permissions: [
+        "<all_urls>",
+        "webRequest",
+        "webRequestBlocking",
+        "webRequestFilterResponse.serviceWorkerScript",
+      ],
+    },
+    background() {
+      browser.webRequest.onBeforeRequest.addListener(
+        req => {
+          if (req.url == "http://localhost/sw.js") {
+            const filter = browser.webRequest.filterResponseData(req.requestId);
+            let decoder = new TextDecoder("utf-8");
+            let encoder = new TextEncoder();
+            filter.ondata = event => {
+              let str = decoder.decode(event.data, { stream: true });
+              browser.test.log(`Got filter ondata event: ${str}\n`);
+              str = `
+                dump('Executing filterResponse script for http://localhost/sw.js\\n');
+                self.onmessage = evt => evt.ports[0].postMessage('filter-response-script');
+                dump('Executed firlterResponse script for http://localhost/sw.js\\n');
+              `;
+              filter.write(encoder.encode(str));
+              filter.disconnect();
+            };
+          }
+
+          return {};
+        },
+        { urls: ["http://localhost/sw.js", "http://localhost/sw-imported.js"] },
+        ["blocking"]
+      );
+    },
+  });
+
+  // Start the test extension to redirect importScripts requests.
+  await extension.startup();
+
+  await ensureDataCleanup();
+  let contentPage = await ExtensionTestUtils.loadContentPage(
+    "http://localhost/page.html"
+  );
+
+  let workerMessage = await contentPage.spawn([], async () => {
+    const reg = await this.content.navigator.serviceWorker.register("/sw.js");
+    return new Promise(resolve => {
+      const { MessageChannel } = this.content;
+      const { port1, port2 } = new MessageChannel();
+      port1.onmessage = evt => resolve(evt.data);
+      const sw = reg.active || reg.waiting || reg.installing;
+      sw.postMessage("worker-message", [port2]);
+    });
+  });
+
+  equal(
+    workerMessage,
+    "filter-response-script",
+    "Got expected worker reply (filterResponse script)"
+  );
+
+  await extension.unload();
+  workerMessage = await testSWUpdate(contentPage);
+  equal(
+    workerMessage,
+    "original-imported-script",
+    "Got expected worker reply (original script)"
+  );
+
+  await contentPage.close();
+});
+
+add_task(async function test_extension_redirect_sw_imported_script() {
+  const extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      permissions: ["<all_urls>", "webRequest", "webRequestBlocking"],
+      web_accessible_resources: ["sw-imported-1.js", "sw-imported-2.js"],
+    },
+    background() {
+      let i = 1;
+      browser.webRequest.onBeforeRequest.addListener(
+        req => {
+          browser.test.log(
+            "Extension is redirecting http://localhost/sw-imported.js"
+          );
+          browser.test.sendMessage("request-redirected");
+          return {
+            redirectUrl: browser.runtime.getURL(`sw-imported-${i++}.js`),
+          };
+        },
+        { urls: ["http://localhost/sw-imported.js"] },
+        ["blocking"]
+      );
+    },
+    files: {
+      "sw-imported-1.js": `
+        dump('importScript redirected to moz-extension://UUID/sw-imported1.js \\n');
+        self.onmessage = evt => evt.ports[0].postMessage('redirected-imported-script-1');
+      `,
+      "sw-imported-2.js": `
+        dump('importScript redirected to moz-extension://UUID/sw-imported2.js \\n');
+        self.onmessage = evt => evt.ports[0].postMessage('redirected-imported-script-2');
+      `,
+    },
+  });
+
+  await ensureDataCleanup();
+  const contentPage = await ExtensionTestUtils.loadContentPage(
+    "http://localhost/page.html"
+  );
+
+  // Register the worker while the test extension isn't loaded and cannot
+  // intercept and redirect the importedScripts requests.
+  let workerMessage = await contentPage.spawn([], async () => {
+    const reg = await this.content.navigator.serviceWorker.register("/sw.js");
+    return new Promise(resolve => {
+      const { MessageChannel } = this.content;
+      const { port1, port2 } = new MessageChannel();
+      port1.onmessage = evt => resolve(evt.data);
+      const sw = reg.active || reg.waiting || reg.installing;
+      sw.postMessage("worker-message", [port2]);
+    });
+  });
+
+  equal(
+    workerMessage,
+    "original-imported-script",
+    "Got expected worker reply (importScripts not intercepted)"
+  );
+
+  // Start the test extension to redirect importScripts requests.
+  await extension.startup();
+
+  // Trigger an update on the registered service worker, then assert that the
+  // reply got is coming from the script where the extension is redirecting the
+  // request.
+  info("Update service worker and expect extension script to reply");
+  workerMessage = await testSWUpdate(contentPage);
+  await extension.awaitMessage("request-redirected");
+  equal(
+    workerMessage,
+    "redirected-imported-script-1",
+    "Got expected worker reply (importScripts redirected to moz-extension url)"
+  );
+
+  // Trigger a new update of the registered service worker, then assert that the
+  // reply got is coming from a different script where the extension is
+  // redirecting the second request (this confirms that the extension can
+  // intercept and can change the redirected imported scripts on new service
+  // worker updates).
+  info("Update service worker and expect new extension script to reply");
+  workerMessage = await testSWUpdate(contentPage);
+  await extension.awaitMessage("request-redirected");
+  equal(
+    workerMessage,
+    "redirected-imported-script-2",
+    "Got expected worker reply (importScripts redirected to moz-extension url again)"
+  );
+
+  // Uninstall the extension and trigger one more update of the registered
+  // service worker, then assert that the reply got is the one coming from the
+  // server (because difference from the one got from the cache).
+  // This verify that the service worker are updated as expected after the
+  // extension is uninstalled and the worker is not stuck on the script where
+  // the extension did redirect the request the last time.
+  info(
+    "Unload extension, update service worker and expect original script to reply"
+  );
+  await extension.unload();
+  workerMessage = await testSWUpdate(contentPage);
+  equal(
+    workerMessage,
+    "original-imported-script",
+    "Got expected worker reply (importScripts not intercepted)"
+  );
+
+  await contentPage.close();
+});
+
+// Test cases for redirects with declarativeNetRequest instead of webRequest,
+// testing the same scenarios as:
+// - test_extension_invalid_sw_scripts_redirect_ignored
+//   i.e. fail to redirect SW main script, fail to redirect SW to about:blank.
+// - test_extension_redirect_sw_imported_script
+//   i.e. allowed to redirect importScripts to moz-extension.
+add_task(async function test_dnr_redirect_sw_script_or_import() {
+  const extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      manifest_version: 3,
+      permissions: ["declarativeNetRequest"],
+      host_permissions: ["<all_urls>"],
+      granted_host_permissions: true,
+      web_accessible_resources: [
+        {
+          resources: ["sw-bad-redirect.js", "sw-dnr-redirect.js", "sw-nest.js"],
+          matches: ["*://*/*"],
+        },
+      ],
+    },
+    temporarilyInstalled: true, // <-- for granted_host_permissions
+    background: async () => {
+      await browser.declarativeNetRequest.updateSessionRules({
+        addRules: [
+          {
+            id: 1,
+            condition: { urlFilter: "|http://localhost/sw.js?dnr_redir_bad" },
+            action: {
+              type: "redirect",
+              redirect: { extensionPath: "/sw-bad-redirect.js" },
+            },
+          },
+          {
+            id: 2,
+            condition: { urlFilter: "|http://localhost/sw-imported.js|" },
+            action: {
+              type: "redirect",
+              redirect: { extensionPath: "/sw-dnr-redirect.js" },
+            },
+          },
+          {
+            id: 3,
+            condition: { urlFilter: "|http://localhost/sw-nest.js|" },
+            action: {
+              type: "redirect",
+              redirect: { extensionPath: "/sw-nest.js" },
+            },
+          },
+          {
+            id: 4,
+            condition: { urlFilter: "|http://localhost/sw-imported.js?about|" },
+            action: {
+              type: "redirect",
+              redirect: { url: "about:blank" },
+            },
+          },
+        ],
+      });
+      browser.test.sendMessage("dnr_registered");
+    },
+    files: {
+      "sw-bad-redirect.js": String.raw`
+        dump('main worker redirected to moz-extension://UUID/sw-bad-redirect.js\n');
+        self.onmessage = evt => evt.ports[0].postMessage('sw-bad-redirect');
+      `,
+      "sw-dnr-redirect.js": String.raw`
+        dump('importScript redirected to moz-extension://UUID/sw-dnr-redirect.js\n');
+        self.onmessage = evt => evt.ports[0].postMessage('sw-dnr-before-nest');
+
+        importScripts("/sw-nest.js");
+        // ^ sw-nest.js does not exist on the server, so if importScripts()
+        // succeeded, then that means that the DNR-triggered redirect worked.
+
+        self.onmessage = evt => evt.ports[0].postMessage('sw-before-about');
+        try {
+          importScripts("/sw-imported.js?about");
+          // ^ DNR redirects to about:blank, which should throw here.
+          self.onmessage = evt => evt.ports[0].postMessage('sw-dnr-about-bad');
+        } catch (e) {
+          // All is good.
+          self.onmessage = evt => evt.ports[0].postMessage('sw-dnr-redirect');
+        }
+      `,
+      "sw-nest.js": String.raw`
+        dump('importScript redirected to moz-extension://UUID/sw-nest.js\n');
+        // No other code here. The caller verifies success by confirming that
+        // the importScripts() call did not throw.
+      `,
+    },
+  });
+
+  // Start the test extension to redirect importScripts requests.
+  await extension.startup();
+  await extension.awaitMessage("dnr_registered");
+
+  await ensureDataCleanup();
+  let contentPage = await ExtensionTestUtils.loadContentPage(
+    "http://localhost/page.html"
+  );
+
+  // Register the worker after loading the test extension, which should not be
+  // able to intercept and redirect the importedScripts requests because of
+  // invalid destinations.
+  info("Register service worker from a content webpage (disallowed redirects)");
+  await contentPage.spawn([], async () => {
+    await Assert.rejects(
+      this.content.navigator.serviceWorker.register("/sw.js?dnr_redir_bad1"),
+      /SecurityError: The operation is insecure/,
+      "Redirect of main service worker script is not allowed"
+    );
+  });
+  info("Register service worker from a content webpage (with import redirect)");
+  let workerMessage = await contentPage.spawn([], async () => {
+    const reg = await this.content.navigator.serviceWorker.register("/sw.js");
+    return new Promise(resolve => {
+      const { MessageChannel } = this.content;
+      const { port1, port2 } = new MessageChannel();
+      port1.onmessage = evt => resolve(evt.data);
+      const sw = reg.active || reg.waiting || reg.installing;
+      sw.postMessage("worker-message", [port2]);
+    });
+  });
+
+  equal(
+    workerMessage,
+    "sw-dnr-redirect",
+    "Got expected worker reply (importScripts redirected to moz-extension:-URL)"
+  );
+
+  await extension.unload();
+  await contentPage.close();
+});
diff --git a/dom/workers/test/xpcshell/test_ext_worker_offline_fetch.js b/dom/workers/test/xpcshell/test_ext_worker_offline_fetch.js
new file mode 100644
index 0000000000..718093422b
--- /dev/null
+++ b/dom/workers/test/xpcshell/test_ext_worker_offline_fetch.js
@@ -0,0 +1,112 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+const { TestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/TestUtils.sys.mjs"
+);
+
+const { AddonTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/AddonTestUtils.sys.mjs"
+);
+
+const { ExtensionTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/ExtensionXPCShellUtils.sys.mjs"
+);
+
+const { createHttpServer } = AddonTestUtils;
+
+// Force ServiceWorkerRegistrar to init by calling do_get_profile.
+// (This has to be called before AddonTestUtils.init, because it does
+// also call do_get_profile internally but it doesn't notify
+// profile-after-change).
+do_get_profile(true);
+
+AddonTestUtils.init(this);
+ExtensionTestUtils.init(this);
+
+const server = createHttpServer({ hosts: ["example.com"] });
+server.registerPathHandler("/dummy", (request, response) => {
+  response.setStatusLine(request.httpVersion, 200, "OK");
+  response.setHeader("Content-Type", "text/html", false);
+  response.write("dummy page");
+});
+
+add_setup(() => {
+  info("Making sure Services.io.offline is true");
+  // Explicitly setting Services.io.offline to true makes this test able
+  // to hit on Desktop builds the same issue that test_ext_cache_api.js
+  // was hitting on Android builds (Bug 1844825).
+  Services.io.offline = true;
+});
+
+// Regression test derived from Bug 1844825.
+add_task(async function test_fetch_request_from_ext_shared_worker() {
+  if (!WebExtensionPolicy.useRemoteWebExtensions) {
+    // Ensure RemoteWorkerService has been initialized in the main
+    // process.
+    Services.obs.notifyObservers(null, "profile-after-change");
+  }
+
+  const background = async function () {
+    const testUrl = `http://example.com/dummy`;
+    const worker = new SharedWorker("worker.js");
+    const { data: result } = await new Promise(resolve => {
+      worker.port.onmessage = resolve;
+      worker.port.postMessage(["worker-fetch-test", testUrl]);
+    });
+
+    browser.test.sendMessage("test-sharedworker-fetch:done", result);
+  };
+
+  const extension = ExtensionTestUtils.loadExtension({
+    background,
+    manifest: { permissions: ["http://example.com/*"] },
+    files: {
+      "worker.js": function () {
+        self.onconnect = evt => {
+          const port = evt.ports[0];
+          port.onmessage = async evt => {
+            let result = {};
+            let message;
+            try {
+              const [msg, url] = evt.data;
+              message = msg;
+              const response = await fetch(url);
+              dump(`fetch call resolved: ${response}\n`);
+              result.fetchResolvesTo = `${response}`;
+            } catch (err) {
+              dump(`fetch call rejected: ${err}\n`);
+              result.error = err.name;
+              throw err;
+            } finally {
+              port.postMessage([`${message}:result`, result]);
+            }
+          };
+        };
+      },
+    },
+  });
+
+  await extension.startup();
+  const result = await extension.awaitMessage("test-sharedworker-fetch:done");
+  if (Services.io.offline && WebExtensionPolicy.useRemoteWebExtensions) {
+    // If the network is offline and the extensions are running in the
+    // child extension process, expect the fetch call to be rejected
+    // with an TypeError.
+    Assert.deepEqual(
+      ["worker-fetch-test:result", { error: "TypeError" }],
+      result,
+      "fetch should have been rejected with an TypeError"
+    );
+  } else {
+    // If the network is not offline or the extension are running in the
+    // parent process, we expect the fetch call to resolve to a Response.
+    Assert.deepEqual(
+      ["worker-fetch-test:result", { fetchResolvesTo: "[object Response]" }],
+      result,
+      "fetch should have been resolved to a Response instance"
+    );
+  }
+  await extension.unload();
+});
diff --git a/dom/workers/test/xpcshell/test_fileReader.js b/dom/workers/test/xpcshell/test_fileReader.js
new file mode 100644
index 0000000000..02bc3fa667
--- /dev/null
+++ b/dom/workers/test/xpcshell/test_fileReader.js
@@ -0,0 +1,33 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Worker must be loaded from a chrome:// uri, not a file://
+// uri, so we first need to load it.
+var WORKER_SOURCE_URI = "chrome://workers/content/worker_fileReader.js";
+do_load_manifest("data/chrome.manifest");
+
+function talk_with_worker(worker) {
+  return new Promise((resolve, reject) => {
+    worker.onmessage = function (event) {
+      let success = true;
+      if (event.data == "OK") {
+        resolve();
+      } else {
+        success = false;
+        reject(event);
+      }
+      Assert.ok(success);
+      worker.terminate();
+    };
+    worker.onerror = function (event) {
+      let error = new Error(event.message, event.filename, event.lineno);
+      worker.terminate();
+      reject(error);
+    };
+    worker.postMessage("START");
+  });
+}
+
+add_task(function test_chrome_worker() {
+  return talk_with_worker(new ChromeWorker(WORKER_SOURCE_URI));
+});
diff --git a/dom/workers/test/xpcshell/test_import_base_uri.js b/dom/workers/test/xpcshell/test_import_base_uri.js
new file mode 100644
index 0000000000..7c88a946f4
--- /dev/null
+++ b/dom/workers/test/xpcshell/test_import_base_uri.js
@@ -0,0 +1,35 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+add_task(async function testSyncImportBeforeAsyncImportDependencyInWorker() {
+  const worker = new ChromeWorker("resource://test/data/base_uri_worker.js");
+
+  const { promise, resolve } = Promise.withResolvers();
+  worker.onmessage = event => {
+    resolve(event.data);
+  };
+  worker.postMessage("");
+
+  const result = await promise;
+
+  Assert.ok(result.scriptToModule.equal1);
+  Assert.ok(result.scriptToModule.equal2);
+  Assert.ok(result.scriptToModule.equal3);
+
+  Assert.ok(result.moduleToModuleURI.equal1);
+  Assert.ok(result.moduleToModuleURI.equal2);
+  Assert.ok(result.moduleToModuleURI.equal3);
+
+  Assert.ok(result.moduleToModuleCurrent.equal1);
+  Assert.ok(result.moduleToModuleCurrent.equal2);
+  Assert.ok(result.moduleToModuleCurrent.equal3);
+
+  Assert.ok(result.moduleToModuleParent.equal1);
+  Assert.ok(result.moduleToModuleParent.equal2);
+  Assert.ok(result.moduleToModuleParent.equal3);
+
+  Assert.ok(result.moduleToModuleAbsolute.equal1);
+  Assert.ok(result.moduleToModuleAbsolute.equal2);
+  Assert.ok(result.moduleToModuleAbsolute.equal3);
+});
diff --git a/dom/workers/test/xpcshell/test_remoteworker_launch_new_process.js b/dom/workers/test/xpcshell/test_remoteworker_launch_new_process.js
new file mode 100644
index 0000000000..b95ad4bcaf
--- /dev/null
+++ b/dom/workers/test/xpcshell/test_remoteworker_launch_new_process.js
@@ -0,0 +1,88 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+const { TestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/TestUtils.sys.mjs"
+);
+
+const { AddonTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/AddonTestUtils.sys.mjs"
+);
+const { createHttpServer } = AddonTestUtils;
+
+// Force ServiceWorkerRegistrar to init by calling do_get_profile.
+// (This has to be called before AddonTestUtils.init, because it does
+// also call do_get_profile internally but it doesn't notify
+// profile-after-change).
+do_get_profile(true);
+
+AddonTestUtils.init(this);
+
+const server = createHttpServer({ hosts: ["localhost"] });
+
+server.registerPathHandler("/sw.js", (request, response) => {
+  info(`/sw.js is being requested: ${JSON.stringify(request)}`);
+  response.setHeader("Content-Type", "application/javascript");
+  response.write("");
+});
+
+add_task(async function setup_prefs() {
+  // Enable nsIServiceWorkerManager.registerForTest.
+  Services.prefs.setBoolPref("dom.serviceWorkers.testing.enabled", true);
+
+  registerCleanupFunction(() => {
+    Services.prefs.clearUserPref("dom.serviceWorkers.testing.enabled");
+  });
+});
+
+/**
+ * This test installs a ServiceWorker via test API and verify that the install
+ * process spawns a new process. (Normally ServiceWorker installation won't
+ * cause a new content process to be spawned because the call to register must
+ * be coming from within an existing content process, but the registerForTest
+ * API allows us to bypass this restriction.)
+ *
+ * This models the real-world situation of a push notification being received
+ * from the network which results in a ServiceWorker being spawned without their
+ * necessarily being an existing content process to host it (especially under Fission).
+ */
+add_task(async function launch_remoteworkers_in_new_processes() {
+  const swm = Cc["@mozilla.org/serviceworkers/manager;1"].getService(
+    Ci.nsIServiceWorkerManager
+  );
+
+  const ssm = Services.scriptSecurityManager;
+
+  const initialChildCount = Services.ppmm.childCount;
+
+  // A test service worker that should spawn a regular web content child process.
+  const swRegInfoWeb = await swm.registerForTest(
+    ssm.createContentPrincipal(Services.io.newURI("http://localhost"), {}),
+    "http://localhost/scope",
+    "http://localhost/sw.js"
+  );
+  swRegInfoWeb.QueryInterface(Ci.nsIServiceWorkerRegistrationInfo);
+
+  info(
+    `web content service worker registered: ${JSON.stringify({
+      principal: swRegInfoWeb.principal.spec,
+      scope: swRegInfoWeb.scope,
+    })}`
+  );
+
+  info("Wait new process to be launched");
+  await TestUtils.waitForCondition(() => {
+    return Services.ppmm.childCount - initialChildCount >= 1;
+  }, "wait for a new child processes to be started");
+
+  // Wait both workers to become active to be sure that. besides spawning
+  // the new child processes as expected, the two remote worker have been
+  // able to run successfully (in other word their remote worker data did
+  // pass successfull the IsRemoteTypeAllowed check in RemoteworkerChild).
+  info("Wait for webcontent worker to become active");
+  await TestUtils.waitForCondition(
+    () => swRegInfoWeb.activeWorker,
+    `wait workers for scope ${swRegInfoWeb.scope} to be active`
+  );
+});
diff --git a/dom/workers/test/xpcshell/test_workers.js b/dom/workers/test/xpcshell/test_workers.js
new file mode 100644
index 0000000000..5b768f69bb
--- /dev/null
+++ b/dom/workers/test/xpcshell/test_workers.js
@@ -0,0 +1,37 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Worker must be loaded from a chrome:// uri, not a file://
+// uri, so we first need to load it.
+var WORKER_SOURCE_URI = "chrome://workers/content/worker.js";
+do_load_manifest("data/chrome.manifest");
+
+function talk_with_worker(worker) {
+  return new Promise((resolve, reject) => {
+    worker.onmessage = function (event) {
+      let success = true;
+      if (event.data == "OK") {
+        resolve();
+      } else {
+        success = false;
+        reject(event);
+      }
+      Assert.ok(success);
+      worker.terminate();
+    };
+    worker.onerror = function (event) {
+      let error = new Error(event.message, event.filename, event.lineno);
+      worker.terminate();
+      reject(error);
+    };
+    worker.postMessage("START");
+  });
+}
+
+add_task(function test_chrome_worker() {
+  return talk_with_worker(new ChromeWorker(WORKER_SOURCE_URI));
+});
+
+add_task(function test_worker() {
+  return talk_with_worker(new Worker(WORKER_SOURCE_URI));
+});
diff --git a/dom/workers/test/xpcshell/test_workers_clone_error.js b/dom/workers/test/xpcshell/test_workers_clone_error.js
new file mode 100644
index 0000000000..f3fd430457
--- /dev/null
+++ b/dom/workers/test/xpcshell/test_workers_clone_error.js
@@ -0,0 +1,43 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Worker must be loaded from a chrome:// uri, not a file://
+// uri, so we first need to load it.
+var WORKER_SOURCE_URI = "chrome://workers/content/worker.js";
+do_load_manifest("data/chrome.manifest");
+
+function talk_with_worker(worker) {
+  return new Promise((resolve, reject) => {
+    worker.onmessage = function (event) {
+      let success = true;
+      if (event.data == "OK") {
+        resolve();
+      } else {
+        success = false;
+        reject(event);
+      }
+      Assert.ok(success);
+      worker.terminate();
+    };
+    worker.onerror = function (event) {
+      let error = new Error(event.message, event.filename, event.lineno);
+      worker.terminate();
+      reject(error);
+    };
+
+    try {
+      // eslint-disable-next-line no-eval
+      eval("/");
+    } catch (e) {
+      worker.postMessage(new ClonedErrorHolder(e));
+    }
+  });
+}
+
+add_task(function test_chrome_worker() {
+  return talk_with_worker(new ChromeWorker(WORKER_SOURCE_URI));
+});
+
+add_task(function test_worker() {
+  return talk_with_worker(new Worker(WORKER_SOURCE_URI));
+});
diff --git a/dom/workers/test/xpcshell/xpcshell.toml b/dom/workers/test/xpcshell/xpcshell.toml
new file mode 100644
index 0000000000..61b1eef0c2
--- /dev/null
+++ b/dom/workers/test/xpcshell/xpcshell.toml
@@ -0,0 +1,38 @@
+[DEFAULT]
+skip-if = ["os == 'android'"]
+support-files = [
+  "data/worker.js",
+  "data/worker_fileReader.js",
+  "data/chrome.manifest",
+  "data/base_uri_worker.js",
+  "data/base_uri_module.mjs",
+  "data/base_uri_module2.mjs",
+]
+
+["test_ext_redirects_sw_scripts.js"]
+# The following firefox-appdir make sure that ExtensionTestUtils.loadExtension
+# will be able to successfully start the background page (it does fail without
+# it because there wouldn't be a global.tabTracker implementation as we would
+# expect in a real Firefox, Fenix or Thunderbird instance).
+firefox-appdir = "browser"
+
+["test_ext_worker_offline_fetch.js"]
+firefox-appdir = "browser"
+
+["test_fileReader.js"]
+
+["test_import_base_uri.js"]
+
+["test_remoteworker_launch_new_process.js"]
+# The following firefox-appdir make sure that this xpcshell test will run
+# with e10s enabled (which is needed to make sure that the test case is
+# going to launch the expected new processes)
+firefox-appdir = "browser"
+# Disable plugin loading to make it rr able to record and replay this test.
+prefs = ["plugin.disable=true"]
+skip-if = ["socketprocess_networking"] # Bug 1759035
+
+
+["test_workers.js"]
+
+["test_workers_clone_error.js"]