Just upgraded my browser to the browser formerly known as Firebird (and now known as Firefox). It’s at version .8, and promises lots of bug fixes, minor UI enhancements, etc.
I’m on a pretty creaky Linux box, and I have to say that .8 is noticeably faster than .7 was. Beyond that, I’ve not noticed any major differences. (Not that I needed any — I remain convinced that Firebird/Firefox is a superior browser in almost every way.)