[ubuntu] a few beginner problems

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http://ubuntuforums.org – Had to format my PC so thought I would try out ubuntu. There's just a couple of problems I'm having though. Flash video. On Firefox, I can full screen a video on my second monitor, but as soon as I click my mouse somewhere on my main monitor, it exits full screen. On chrome, full screen video is terrible, all zoomed in and only loads on half the screen. Anyone have any idea how to fix these two problems? Thanks! (Hardware)