Finally! Firefox 7 delivers!

From using it for about 20 minutes, I can say the memory usage is down and the memory holes appear to be fixed. I can actually read articles at The Economist without crashing my computer (previously it would just keep chewing up more and more memory). My Chrome temptations are now purged (though Smooth Gestures turning out to be spyware was a prohibitive impediment; no other mouse gestures extension for Chrome works right).