Issue 6391 - Allow running the browser unit tests with Firefox

chromium_process.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 238 matching lines @@
 }
 
 function runScript(script, scriptName, scriptArgs)
 {
   return connectRemoteInterface().then(async client =>
   {
     try
     {
       let {Runtime, Log, Console} = client;
 
+      console.log("\nTest in Chromium\n");
+
       await Log.enable();
       Log.entryAdded(({entry}) =>
       {
         reportMessage(entry.text, entry.level);
       });
 
       await Console.enable();
       Console.messageAdded(({message}) =>
       {
         reportMessage(message.text, message.level);
@@ skipping 47 matching lines @@
     {
       child.kill();
       return result;
     }).catch(error =>
     {
       child.kill();
       throw error;
     });
   });
 };