If you're getting BSOD's then there is something seriously wrong with your computer. It's either a hardware problem, or a corrupt Windows install. Do any other programs give you problems like that?
For now, try (re-)installing the latest version: http://getfirefox.com/
Locate your Firefox profile folder and rename or move out the file "mimeTypes.rdf".
Next time you open a MP3, select the open with program option.
Mozilla wont let me watch movies, like teh plug ins for quicktime, media player, real, wont load....and its just a blank screen and the video dosent load....and my internet explorer is screwed up, tahts why i switched to mozilla! and i switch to netscape, and thats pretty much the same thing! pelase help
Have you got the latest version of Firefox?
Download it again: http://getfirefox.com/