Every day or so, Firefox tells me:
Update Available
A security and stability update for Firefox is available:
Firefox 5.0 Beta
It is strongly recommended that you apply this update for Firefox as soon as possible.
The only choices are "Ask Later" and "Update Firefox".
I don't think 5.0b is actually a stability update for 4.0.x. I probably got roped into this because I was testing FF4 betas, but now I'm on 4.0.x and perfectly happy. How do I get it to stop asking me?