I thought I'd try out Firefox 3 for a bit. Part of my job is to stay up to date with the latest and greatest, and I was hoping the much-touted memory management enhancements would be a nice plus.
So far, I'm well impressed. AJAX- and JavaScript-heavy sites are vastly faster, so for example Gmail snaps open, Google Reader zips along. The CMS I use all day every day also flies. Most importantly, they really do seem to have plugged the memory leaks. By this time of day, I'd expect Firefox to be around 200 megs, having used a few AJAX sites quite heavily. Instead, it's around 115 megs with four tabs and two CMS windows open. It also seems to go down when you close tabs and windows, which is something that didn't happen before. It also remains quite zippy.
Haven't noticed any bugs or rendering weirdness yet, which is a good sign. Only problem so far is that Firebug isn't yet available. There's a version of it for Firefox 3, but it apparently has some issues. If I decide Firefox 3 is stable enough to use all the time, I'll try out the upgraded Firebug. Life without Firebug would be a much reduced life...