Just came across this which confirmed the feeling I’ve had for the last few days: Firefox 3 is fast and memory friendly.
The previous beta (b3) gave me quite a few problems. There were a few annoying bugs, the most annoying one being memory usage, though to be fair it was not as bad as Firefox 2. Yet, I was forced to restart the browser once every two days or so.
With beta4, Firefox has turned into a real speed demon. Also, it doesn’t eat nearly as much memory as it used to. It may not be as fast as Opera yet, but Opera (sadly, because I really like Opera) has psycho-fits when there’s a lot of flash content on a page (as is the case with YouTube). Those pages cause Opera to freeze for minutes. And I am not very patient..
I didn’t use Firefox 2 much, as I really didn’t get on well with it. Instead I used a combination of Galeon, Epiphany, Opera and even Konqueror. But ever since Firefox 3 beta 2 was released, Firefox has gone back to being my primary browser.
I cannot say much about how well various extensions work, because I’m not an extension groupie. The one that I really use, ScrapBook, works just fine.