LIKE BRO, i read all of the reviews and the person below my "review" just gave an excuse to put 1 stars, BEFORE SAYING SH LIKE THIS, WHEN YOU UPLOAD THE ADDON TO FIREFOX YOU UPLOAD THE SOURCE, and it scans EVERYTHING for viruses OR ERRORS, this addon is an unofficial port so it has ALOT of errors, to be exact 330 or something and 5 CRITICAL ERRORS that didnt let the addon to be uploaded so i had to manually FIX THOSE, SO EXPECT THIS TO BE GLITCHY! If some issues occur or something doesnt work or does the wrong thing, it is because it is UNOFFICIAL PORTED VERSION!