geek help

So, for any of my suitably geeky friends out there.. Anyone wanna take a guess as to why Firefox, after running smoothly for days on end, will suddenly start grabbing the lion's share of my cpu? (often up to 99% cpu?)

I really like firefox, but when it suddenly decides to hog the entire system and reduce everything to a crawl, I get annoyed. I've tried disabling/uninstalling add-ons one by one to see if that's the problem, but I can't conclusively say any odd on is doing it.

Grrrrr..

*blink*

Holy Crap, FA is back up.

*blink*
*amazed*