Issue 3503 - Fixed: Screenshot marker in Issue Reporter is no longer red

lib/child/dataCollector.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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 107 matching lines @@
   {
     pixelData.data[i] = mapping[pixelData.data[i] >> 6];
 
     if (i % 5000 == 0)
     {
       // Take a break every 5000 bytes to prevent browser hangs
       yield new Promise((resolve, reject) => Utils.runAsync(resolve));
     }
   }
 
-  // Convert the data into an image URL
-  context.putImageData(pixelData, 0, 0);
-  return canvas.toDataURL("image/png");
+  return pixelData;
 }