commit 088127cb9da87b426d7884b4f8b556a8e31433fb
parent c48f4b18bdf3d76833cda4b63643615c3a921bcb
Author: Thomas Wisniewski <twisniewski@mozilla.com>
Date: Thu, 20 Nov 2025 20:03:53 +0000
Bug 1950282 - update our webcompat intervention for f1tv.formula1.com; r=denschub,webcompat-reviewers
Differential Revision: https://phabricator.services.mozilla.com/D273467
Diffstat:
3 files changed, 127 insertions(+), 2 deletions(-)
diff --git a/browser/extensions/webcompat/data/interventions.json b/browser/extensions/webcompat/data/interventions.json
@@ -4570,7 +4570,10 @@
"interventions": [
{
"platforms": ["all"],
- "ua_string": ["Chrome", "add_Firefox_as_Gecko"]
+ "content_scripts": {
+ "js": ["bug1950282-f1tv.formula1.com-unblock-firefox.js"]
+ },
+ "ua_string": ["Chrome"]
},
{
"platforms": ["linux"],
diff --git a/browser/extensions/webcompat/injections/js/bug1950282-f1tv.formula1.com-unblock-firefox.js b/browser/extensions/webcompat/injections/js/bug1950282-f1tv.formula1.com-unblock-firefox.js
@@ -0,0 +1,122 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * Bug 1950282 - UA spoof for f1tv.formula1.com
+ *
+ * This site is deliberately blocking Firefox, possibly due to bug 1992579.
+ */
+
+/* globals cloneInto, exportFunction */
+
+console.info(
+ "The window environment is being altered for compatibility reasons. If you're a web developer working on this site, please get in touch with developer-outreach@mozilla.com. See https://bugzilla.mozilla.org/show_bug.cgi?id=1950282 for details."
+);
+
+delete window.wrappedJSObject.InstallTrigger;
+delete window.wrappedJSObject.mozInnerScreenX;
+delete window.wrappedJSObject.mozInnerScreenY;
+delete window.wrappedJSObject.MozConsentBanner;
+
+const nav = Object.getPrototypeOf(navigator.wrappedJSObject);
+const vendor = Object.getOwnPropertyDescriptor(nav, "vendor");
+vendor.get = exportFunction(() => "Google Inc.", window);
+Object.defineProperty(nav, "vendor", vendor);
+
+const css = CSS.wrappedJSObject;
+const supports = Object.getOwnPropertyDescriptor(css, "supports");
+const oldSupports = supports.value;
+supports.value = exportFunction(function (query) {
+ if (query.includes("moz-")) {
+ return false;
+ }
+ return oldSupports.call(this, query);
+}, window);
+Object.defineProperty(css, "supports", supports);
+
+function generateTimeStamp(base, factor = 10) {
+ if (base) {
+ // increase another timestamp by a little
+ return (base + Math.random() * factor).toString().substr(0, 14);
+ }
+ const r = Math.random().toString();
+ const d10 = `1${r.substr(5, 9)}`;
+ const d3 = r.substr(2, 3);
+ return parseFloat(`${d10}.${d3}`);
+}
+
+const startLoadTime = generateTimeStamp();
+const commitLoadTime = generateTimeStamp(startLoadTime);
+const firstPaintTime = generateTimeStamp(commitLoadTime);
+const finishDocumentLoadTime = generateTimeStamp(firstPaintTime);
+const finishLoadTime = generateTimeStamp(finishDocumentLoadTime);
+
+const csi = cloneInto(
+ {
+ onloadT: parseInt(finishDocumentLoadTime * 100),
+ pageT: generateTimeStamp().toString().substr(-11),
+ startE: parseInt(parseFloat(startLoadTime * 100)),
+ tran: 10 + parseInt(4 + Math.random() * 4),
+ },
+ window
+);
+
+const loadTimes = cloneInto(
+ {
+ commitLoadTime,
+ connectionInfo: "h3",
+ finishDocumentLoadTime,
+ finishLoadTime,
+ firstPaintAfterLoadTime: 0,
+ firstPaintTime,
+ navigationType: "Other",
+ npnNegotiatedProtocol: "h3",
+ requestTime: startLoadTime,
+ startLoadTime,
+ wasAlternateProtocolAvailable: false,
+ wasFetchedViaSpdy: true,
+ wasNpnNegotiated: true,
+ },
+ window
+);
+
+window.wrappedJSObject.chrome = cloneInto(
+ {
+ app: {
+ InstallState: {
+ DISABLED: "disabled",
+ INSTALLED: "installed",
+ NOT_INSTALLED: "not_installed",
+ },
+ RunningState: {
+ CANNOT_RUN: "cannot_run",
+ READY_TO_RUN: "ready_to_run",
+ RUNNING: "running",
+ },
+ getDetails() {
+ return null;
+ },
+ getIsInstalled() {
+ return false;
+ },
+ installState() {
+ return undefined;
+ },
+ isInstalled: false,
+ runningState() {
+ return window.chrome.app.InstallState.NOT_INSTALLED;
+ },
+ },
+ csi() {
+ return csi;
+ },
+ loadTimes() {
+ return loadTimes;
+ },
+ },
+ window,
+ { cloneFunctions: true }
+);
diff --git a/browser/extensions/webcompat/manifest.json b/browser/extensions/webcompat/manifest.json
@@ -2,7 +2,7 @@
"manifest_version": 2,
"name": "Web Compatibility Interventions",
"description": "Urgent post-release fixes for web compatibility.",
- "version": "147.5.0",
+ "version": "147.6.0",
"browser_specific_settings": {
"gecko": {
"id": "webcompat@mozilla.org",
