Issue 5028 - Use browser namespace

devtools.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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 "use strict";
 
 let panelWindow = null;
 
 // Versions of Firefox before 54 do not support the devtools.panels API; on
 // these platforms, even when the option is enabled, we cannot show the
 // devtools panel.
-if ("panels" in chrome.devtools)
+if ("panels" in browser.devtools)
 {
-  chrome.runtime.sendMessage(
+  browser.runtime.sendMessage(
     {
       type: "prefs.get",
       key: "show_devtools_panel"
     },
     enabled =>
     {
       if (enabled)
       {
-        chrome.devtools.panels.create(
+        browser.devtools.panels.create(
           "Adblock Plus",
           "icons/detailed/abp-48.png",
           "devtools-panel.html",
           panel =>
           {
             panel.onShown.addListener(window =>
             {
               panelWindow = window;
             });
 
             panel.onHidden.addListener(window =>
             {
               panelWindow = null;
             });
 
             if (panel.onSearch)
             {
               panel.onSearch.addListener((eventName, queryString) =>
               {
                 if (panelWindow)
                   panelWindow.postMessage({type: eventName, queryString}, "*");
               });
             }
           }
         );
       }
     }
   );
 }