I have been using Firefox for about a year now, and I've really been impressed by it.
Anyway, that plug aside, recently I've been having a problem with it.
Every time I open it up, it will work for a few seconds and then inexplicably freeze up on me.
If I change the program (say, open media player) I am unable to open Firefox again, and am forced to manually end the the process in the task manager.
If you want to have a better picture of what is happening, here's a link to a video showing the problem:
http://www.youtube.com/watch?v=3EnaBwc2kSs
Why does Firefox always crash after opening?
Theres a leak with the new version