Issue 5028 - Use browser namespace

lib/prefs.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 301 matching lines @@
     {
       for (let key in items)
         overrides[keyToPref(key)] = items[key];
 
       resolve();
     });
   });
 
   let managedLoaded = new Promise(resolve =>
   {
-    if (require("info").platform == "chromium" && "managed" in chrome.storage)
+    if (require("info").platform == "chromium" && "managed" in browser.storage)
     {
-      chrome.storage.managed.get(null, items =>
+      browser.storage.managed.get(null, items =>
       {
-        // Opera doesn't support chrome.storage.managed, but instead simply
-        // removing the API, Opera sets chrome.runtime.lastError when using it.
+        // Opera doesn't support browser.storage.managed, but instead simply
+        // removing the API, Opera sets browser.runtime.lastError when using it.
         // So we have to retrieve that error, to prevent it from showing up
         // in the console.
-        chrome.runtime.lastError;
+        browser.runtime.lastError;
 
         for (let key in items)
           defaults[key] = items[key];
 
         resolve();
       });
     }
     else
     {
       resolve();
@@ skipping 18 matching lines @@
           eventEmitter.emit(pref);
         }
       }
     });
   }
 
   Prefs.untilLoaded = Promise.all([localLoaded, managedLoaded]).then(onLoaded);
 }
 
 init();