As my Firefox usage goes on, it gobbles up more and more MB of my RAM for seemingly no reason. I have 4GB of RAM, yet it gets to the point where Firefox starts visibly lagging in a periodic and frequent manner.
By the time it gets REALLY annoying, Task Manager usually says it's at 650,000-700,000KB. A quick reset of Firefox makes it go back to 100,000... But there's got to be a better way, even though Google tells me nothing.
My copy of Firefox is a standard 3.0 install, with automatic updates on, and I'm running it on Vista 64-bit. Here's a picture of my extensions:
I use no theme.
Help?