Actually I am still on an older version, so it is Firebird.
I was just trying to pull up a few news articles on an Olympic event that interested me. The first one took forever to load, so I clicked on a few others, which also all seemed slow. Then suddenly I got a popup I'd never seen before:
A script on this page is causing mozilla to run slowly. If it continues to run, your computer may become unresponsive. Do you want to abort the script?
Bravo! Three cheers for Mozilla! That feature just shot to the top of my list of reasons to use Mozilla, even above popup blocking and compatibility with some sites that just don't like IE.
I didn't even really realize this was a problem, though I knew it was theoretically possible. I wonder if a lot of slow loading I see is due to this. I wonder if they could make the check for this a little more strict.