Noissue - Don't hard-code options and popup URL

lib/options.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 170 matching lines @@
 // options page to open instead of the bubble. Unfortunately there's a bug[1]
 // which prevents us from doing that, so we must avoid setting the URL on
 // Firefox from the manifest at all, instead setting it here only for
 // non-mobile.
 // [1] - https://bugzilla.mozilla.org/show_bug.cgi?id=1414613
 if ("getBrowserInfo" in browser.runtime)
 {
   browser.runtime.getBrowserInfo().then(browserInfo =>
   {
     if (browserInfo.name == "Fennec")
-      browser.browserAction.setPopup({popup: null});
+      browser.browserAction.setPopup({popup: ""});
   });
 }
 
 // On Firefox for Android, open the options page directly when the browser
 // action is clicked.
 browser.browserAction.onClicked.addListener(() =>
 {
   browser.tabs.query({active: true, lastFocusedWindow: true}, ([tab]) =>
   {
     let currentPage = new ext.Page(tab);
 
     showOptions((optionsPage, port) =>
     {
       if (!/^https?:$/.test(currentPage.url.protocol))
         return;
 
       port.postMessage({
         type: "app.respond",
         action: "showPageOptions",
         args: [
           {
             host: currentPage.url.hostname.replace(/^www\./, ""),
             whitelisted: !!checkWhitelisted(currentPage)
           }
         ]
       });
     });
   });
 });