Lately, videos on YouTube seem to sort of freeze on and off at the beginning of the video sometimes, so the playback isn't smooth. Additionally, if I leave a video paused for a long time, such as 30 minutes or more, because I'm doing something else, such as editing something on Windows Movie Maker, watching a TV show, or not being home, when I click play, both the video and sound sound like when you're getting cut off on the phone, and a lot of times, the video disappears and the video player shows a static screen saying an error has occurred. Also, if I leave a video paused instead of going back to my channel, it's because I'm listening to a playlist, such as Basshunter. Anyway, I'm not sure if it's my browser or not, but I'm thinking of moving back to Google Chrome, so I thought it'd be nice to get a pros and contras list of them.
You can try updating your system's Flash Player. Remember, Flash is not a part of Firefox. Chrome uses it's own internal Flash Player and updates automatically as the browser updates. Alternatively you can opt in for YouTube's HTML5 player: www.youtube.com/html5 Try these and let is know. EDIT: Here's an article that compares several different browsers (including Firefox and Chrome), its GNU/Linux oriented, but all browsers mentioned are cross-platform: http://netrunner-mag.com/?p=1990