Firefox & Flock Taking Up Most of my Resources!?

Alright, I've got a decent setup with 2gb of memory and I'm having a lot of my resources including CPU/MEM taken up by just my browsers! Granted in firefox I've got 3 windows open with about 40 tabs total but it still shouldn't take up 800,000 memory! Photoshop don't even take up 50,000 together. I do have a lot of things open but my browsers are hogging just a ton of resources and I've got to restart to get them back. Firefox starts our around 200,000 and then within a day or sometimes even just a few hours it climbs up to nearly 800,000! I'm guessing I've got an extension that is poorly written but it slows down my entire computer and I've got to restart. The CPU for both flock and Firefox is about 50 when photoshop's is much less!

I'm taking the numbers from the Windows Task Manager BTW.

Thanks for your input guys, always a pleasure!

 

IE7?