Bug 1453691 - create a Fennec system addon to spoof the UA string as Chrome for Google Search and Facebook. r=rhelmer

MozReview-Commit-ID: FFwhvvAqffs

--HG--
extra : rebase_source : 26c0d9226beb8cbcaf32476b4f84dcba7200fb3a

mobile/android/app.mozbuild

@@ -5,6 +5,9 @@
 
 include('/toolkit/toolkit.mozbuild')
 
+if CONFIG['MOZ_EXTENSIONS']:
+    DIRS += ['/extensions']
+
 DIRS += [
     '/%s' % CONFIG['MOZ_BRANDING_DIRECTORY'],
     '/mobile/android',

mobile/android/base/Makefile.in

@@ -48,7 +48,7 @@ $(ABS_DIST)/fennec/$(OMNIJAR_NAME): FORCE
 
 .PHONY: features
 features::
-	$(call py_action,generate_builtin_addons,chrome/chrome/content/built_in_addons.json)
+	$(call py_action,generate_builtin_addons,--features=features chrome/chrome/content/built_in_addons.json)
 
 ifndef MOZILLA_OFFICIAL
 # Targets built very early during a Gradle build.  In automation,

mobile/android/extensions/gws-and-facebook-chrome-spoof/bootstrap.js

@@ -0,0 +1,73 @@
+/* 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/. */
+
+/* globals Services */
+
+"use strict";
+
+ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
+ChromeUtils.import("resource://gre/modules/Services.jsm");
+ChromeUtils.defineModuleGetter(this, "UserAgentOverrides", "resource://gre/modules/UserAgentOverrides.jsm");
+Cu.importGlobalProperties(["URL"]);
+
+const TLDsToSpoof = /(^(www|encrypted|maps)\.google\.)|((.*\.facebook|.*\.fbcdn|.*\.fbsbx)\.(com|net)$)/;
+
+const OverrideNotice = "The user agent string has been overridden to get the Chrome experience on this site.";
+
+const defaultUA = Cc["@mozilla.org/network/protocol;1?name=http"].
+                    getService(Ci.nsIHttpProtocolHandler).userAgent;
+
+const RunningFirefoxVersion = (defaultUA.match(/Firefox\/([0-9.]+)/) || ["", "58.0"])[1];
+const RunningAndroidVersion = defaultUA.match(/Android\/[0-9.]+/) || "Android 6.0";
+
+const ChromeMajorVersionToMimic = `${parseInt(RunningFirefoxVersion) + 4}.0.0.0`;
+
+const ChromePhoneUA = `Mozilla/5.0 (Linux; ${RunningAndroidVersion}; Nexus 5 Build/MRA58N) FxQuantum/${RunningFirefoxVersion} AppleWebKit/537.36 (KHTML, like Gecko) Chrome/${ChromeMajorVersionToMimic} Mobile Safari/537.36`;
+const ChromeTabletUA = `Mozilla/5.0 (Linux; ${RunningAndroidVersion}; Nexus 7 Build/JSS15Q) FxQuantum/${RunningFirefoxVersion} AppleWebKit/537.36 (KHTML, like Gecko) Chrome/${ChromeMajorVersionToMimic} Safari/537.36`;
+
+const IsPhone = defaultUA.includes("Mobile");
+
+const TargetUA = IsPhone ? ChromePhoneUA : ChromeTabletUA;
+
+const EnabledPref = "extensions.gws-and-facebook-chrome-spoof.enabled";
+
+let Enabled = true;
+
+function checkIfEnabled() {
+  Enabled = Services.prefs.getBoolPref(EnabledPref, true);
+}
+
+this.install = () => {
+  Services.prefs.setBoolPref(EnabledPref, true);
+};
+
+this.uninstall = () => {
+  Services.prefs.clearUserPref(EnabledPref);
+};
+
+this.shutdown = () => {
+  Services.prefs.removeObserver(EnabledPref, checkIfEnabled);
+  Enabled = false;
+};
+
+this.startup = () => {
+  UserAgentOverrides.addComplexOverride((channel, defaultUA) => {
+    if (!Enabled) {
+      return false;
+    }
+
+    try {
+      let domain = new URL(channel.URI.spec).host;
+      if (domain.match(TLDsToSpoof)) {
+        console.info(OverrideNotice);
+        return TargetUA;
+      }
+    } catch (_) {
+    }
+    return false;
+  });
+
+  Services.prefs.addObserver(EnabledPref, checkIfEnabled);
+  checkIfEnabled();
+};

mobile/android/extensions/gws-and-facebook-chrome-spoof/install.rdf.in

@@ -0,0 +1,29 @@
+<?xml version="1.0"?>
+<!-- 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/. -->
+
+#filter substitution
+
+<RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+     xmlns:em="http://www.mozilla.org/2004/em-rdf#">
+  <Description about="urn:mozilla:install-manifest">
+    <em:id>gws-and-facebook-spoof@mozilla.org</em:id>
+    <em:type>2</em:type>
+    <em:bootstrap>true</em:bootstrap>
+    <em:multiprocessCompatible>true</em:multiprocessCompatible>
+
+    <em:name>Use Chrome mobile version of Google Search and Facebook</em:name>
+    <em:description>Enables the Chrome Mobile experience for Google Search and Facebook.</em:description>
+
+    <em:version>1.0.0</em:version>
+
+    <em:targetApplication>
+      <Description>
+        <em:id>{aa3c5121-dab2-40e2-81ca-7ea25febc110}</em:id>
+        <em:minVersion>@MOZ_APP_VERSION@</em:minVersion>
+        <em:maxVersion>@MOZ_APP_MAXVERSION@</em:maxVersion>
+      </Description>
+    </em:targetApplication>
+  </Description>
+</RDF>

mobile/android/extensions/gws-and-facebook-chrome-spoof/moz.build

@@ -0,0 +1,19 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+DEFINES['MOZ_APP_VERSION'] = CONFIG['MOZ_APP_VERSION']
+DEFINES['MOZ_APP_MAXVERSION'] = CONFIG['MOZ_APP_MAXVERSION']
+
+with Files('**'):
+  BUG_COMPONENT = ('Web Compatibility Tools', 'General')
+
+FINAL_TARGET_FILES.features['gws-and-facebook-spoof@mozilla.org'] += [
+  'bootstrap.js'
+]
+
+FINAL_TARGET_PP_FILES.features['gws-and-facebook-spoof@mozilla.org'] += [
+  'install.rdf.in'
+]

mobile/android/extensions/moz.build

@@ -0,0 +1,14 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+with Files('**'):
+    BUG_COMPONENT = ('Firefox for Android', 'General')
+
+# Only include the following system add-ons if building Nightly
+if CONFIG['NIGHTLY_BUILD']:
+    DIRS += [
+        'gws-and-facebook-chrome-spoof',
+    ]

mobile/android/moz.build

@@ -52,6 +52,7 @@ DIRS += [
     'base',
     'chrome',
     'components',
+    'extensions',
     'modules',
     'themes/core',
     'themes/geckoview',