It's quite a nice update. Noticeable faster, loads of new features evident n beneath the skin. All my addons still work. The personas are sweet.

Mozilla | Firefox web browser & Thunderbird email client
YouTube - What's new in Firefox 3.5?
Personas for Firefox | Dress up your web browser

 

Not noticed any improvements in speed etc, but I do like the idea of private browsing.

 

Really? It's alot snappier for me especially opening pages with lots of pics, n the utube/vid sites have all lost the stutter they use to have, that nvr happened in IE8. That could be addons I'm running though. I'm runnin a speedy core2duo rig, so to notice a speed improvement must be a good thing.