Works great on many sites but few are a messed up. IMDB and few others. Sites with video and other things on the page causes the video to flicker when scrolling. Not a big deal but annoying. Fix that and it is perfect. I have tried changing the theme but it either fixes the one messed up and wrecks another that was fine before. I went through every check box. Like I said, needs a few tweaks, but otherwise near perfect.