Bug 1731825 - Hide the Office365 Outlook registerProtocolHandler notification after it shows once, as a work-around until bug 668577 is fixed; r=ksenia,webcompat-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D126374

browser/extensions/webcompat/data/injections.js

@@ -375,6 +375,26 @@ const AVAILABLE_INJECTIONS = [
       ],
     },
   },
+  {
+    id: "bug1731825",
+    platform: "desktop",
+    domain: "Office 365 email handling prompt",
+    bug: "1731825",
+    contentScripts: {
+      matches: [
+        "*://*.live.com/*",
+        "*://*.office.com/*",
+        "*://*.sharepoint.com/*",
+      ],
+      js: [
+        {
+          file:
+            "injections/js/bug1731825-office365-email-handling-prompt-autohide.js",
+        },
+      ],
+      allFrames: true,
+    },
+  },
   {
     id: "bug1707795",
     platform: "desktop",

browser/extensions/webcompat/injections/js/bug1731825-office365-email-handling-prompt-autohide.js

@@ -0,0 +1,32 @@
+"use strict";
+
+/**
+ * Bug 1731825 - Office 365 email handling prompt autohide
+ *
+ * This site patch prevents the notification bar on Office 365
+ * apps from popping up on each page-load, offering to handle
+ * email with Outlook.
+ */
+
+/* globals exportFunction */
+
+const warning =
+  "Office 365 Outlook email handling prompt has been hidden. See https://bugzilla.mozilla.org/show_bug.cgi?id=1731825 for details.";
+
+const localStorageKey = "mailProtocolHandlerAlreadyOffered";
+
+const nav = navigator.wrappedJSObject;
+const { registerProtocolHandler } = nav;
+const { localStorage } = window.wrappedJSObject;
+
+Object.defineProperty(navigator.wrappedJSObject, "registerProtocolHandler", {
+  value: exportFunction(function(scheme, url, title) {
+    if (localStorage.getItem(localStorageKey)) {
+      console.info(warning);
+      return undefined;
+    }
+    registerProtocolHandler.call(nav, scheme, url, title);
+    localStorage.setItem(localStorageKey, true);
+    return undefined;
+  }, window),
+});

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": "26.2.0",
+  "version": "26.3.0",
   "applications": {
     "gecko": {
       "id": "webcompat@mozilla.org",

browser/extensions/webcompat/moz.build

@@ -78,6 +78,7 @@ FINAL_TARGET_FILES.features["webcompat@mozilla.org"]["injections"]["js"] += [
     "injections/js/bug1714612-www.rfi.it-outertext.js",
     "injections/js/bug1724764-amextravel.com-window-print.js",
     "injections/js/bug1724868-news.yahoo.co.jp-ua-override.js",
+    "injections/js/bug1731825-office365-email-handling-prompt-autohide.js",
 ]
 
 FINAL_TARGET_FILES.features["webcompat@mozilla.org"]["shims"] += [