Hi, I seem to have come across a problem that only occurs in Firefox: while playing videos in basically any video player (YouTube, Vimeo, LiveLeak,) a green bar / stripe appears either on the bottom of the video or at the right hand side of it. I'm using HTML5 for playback, and the green bar does not appear while I switch to flash player. Like I've mentioned it only appears in Firefox: I've tried using Internet Explorer and suprisingly enough, no green bar there (IE also using HTML5 for playback.) Most of online solutions to this problem mention switching the hardware acceleration off, but I'm using HTML5 so there is no option to do so in the player, and disabling it in Firefox doesn't seem to help at all. I'm pretty sure my video card drivers are up to date along with any other software that is involved in playback. I'm not sure what to do now. The better the quality of the video the smaller the stripe gets but it's still pretty annoying and I want to get rid of it. Thanks in advance.