Firefox,Safari: fill vAPI.app in a different way

Pass the extension data (name and version) as the fragment of the URL
for the background script, so vAPI.app can be filled without using XHR
to read the manifest files.

platform/firefox/bootstrap.js

@@ -19,43 +19,37 @@
     Home: https://github.com/gorhill/uBlock
 */
 
-/* global Services, APP_STARTUP, APP_SHUTDOWN */
+/* global APP_SHUTDOWN */
 /* exported startup, shutdown, install, uninstall */
 
 'use strict';
 
 /******************************************************************************/
 
-var bgProcess;
-
-Components.utils['import']('resource://gre/modules/Services.jsm');
+let bgProcess;
 
 /******************************************************************************/
 
-function startup(data, reason) {
-    bgProcess = function(ev) {
-        if (ev) {
-            this.removeEventListener(ev.type, bgProcess);
-        }
+function startup(data) {
+    let {AddonManager} = Components.utils['import'](
+        'resource://gre/modules/AddonManager.jsm',
+        null
+    );
 
-        bgProcess = Services.appShell.hiddenDOMWindow.document;
-        bgProcess = bgProcess.documentElement.appendChild(
-            bgProcess.createElementNS('http://www.w3.org/1999/xhtml', 'iframe')
+    AddonManager.getAddonByID(data.id, addon => {
+        let hDoc = Components.classes['@mozilla.org/appshell/appShellService;1']
+            .getService(Components.interfaces.nsIAppShellService)
+            .hiddenDOMWindow.document;
+
+        bgProcess = hDoc.documentElement.appendChild(
+            hDoc.createElementNS('http://www.w3.org/1999/xhtml', 'iframe')
         );
-        bgProcess.setAttribute('src', 'chrome://ublock/content/background.html');
-    };
-
-    if (reason === APP_STARTUP) {
-        Services.ww.registerNotification({
-            observe: function(win) {
-                Services.ww.unregisterNotification(this);
-                win.addEventListener('DOMContentLoaded', bgProcess);
-            }
+
+        let bgURI = 'chrome://ublock/content/background.html';
+
+        // send addon data synchronously to the background script
+        bgProcess.src = bgURI + '#' + [addon.name, addon.version];
     });
-    }
-    else {
-        bgProcess();
-    }
 }
 
 /******************************************************************************/
@@ -70,7 +64,8 @@ function shutdown(data, reason) {
 
 function install() {
     // https://bugzil.la/719376
-    Services.strings.flushBundles();
+    Components.classes['@mozilla.org/intl/stringbundle;1']
+        .getService(Components.interfaces.nsIStringBundleService).flushBundles();
 }
 
 /******************************************************************************/