Haven't really used Firefox in a long time but after the latest Chrome update that screwed up the scrollbar and 'X' tab close etc, i went back to try it.
Updated to the latest on the Beta channel, version 27.0 (
http://www.mozilla.org/en-US/firefox/beta/ )
So far it's very nice ... for the first time in years firefox has regain the snappy performance and speed that it had a long,long time ago. Scrolling is smooth and quick and page loading is so much better. I haven't check for memory leakage yet.
I had given up on Firefox tbh but this latest version might just bring me back.