Firefox v0.9 has just been released. The Release Candidate (RC) was just released on the 10th, so I suspect the RC they felt was pretty stable. Anyway, here's a peak at what's new:
I'm in the process of installing v0.9 as I type this. Hopefully all my extensions continue to work. I really love Firefox—it's become my primary browser, and I was beginning to think I'd be using IE forever.
NOTE:You may want to backup your previous Firefox installation. It seems that all installed extensions and themes get removed.