I'm running a Macbook with 4 gb of RAM. My FireFox is constantly "hiccupping" with video playback - for instance, YouTube videos. The video freezes up every 10 seconds or so for about 2-3 seconds as the audio continues, then the video unfreezes. Even as I type this, things I'm entering in this box aren't showing up for a second or two. Additionally, I have certain Flash videos that won't play. I have the newest Flash player and Adobe Flash's website test says my Flash Player is working. I don't have any of these problems in Safari, but I like FireFox a lot more (Add-ins, NORMALLY a faster browser, better GUI, etc.). I've tried reinstalling Flash and disabling Adblock (I hear it's the cause for stuff a lot of times) but nothing has worked.