I downloaded and now use the Minefield releases of Firefox. It's the latest build and they are running extremely fast for me on Win7 and I've had no issues to speak of. So, maybe you can just give this a try...rather than having to move completely away from Mozilla firefox.
I have the same...very fast!
My Computer
- Computer Manufacturer/Model Number
- Gateway
- OS
- Win 7 Home Premium-64bit
- CPU
- 2.3
- Memory
- 4 gig