For some time now (at least a year), I've noticed that the colors in videos are slightly off. The problem never affects still images, just videos (on every site). Most users wouldn't notice the problem as it's quite subtle, but all the hues are all slightly off: Reds are slightly more yellow than they should be, yellows are slightly redder, blues are slightly more cyan, and cyans are slightly bluer. I don't use other browsers so not sure if this is a Firefox problem or a wider problem. I don't have Flash installed so (presumably) the videos run in HTML5.