I am having a Firefox with plenty of add-ons installed. Sometimes Firefox get stuck with high CPU usage on the pages having no Flash. I'd like to solve what's causing this in a more professional manner than randomly disabling extensions, as this method is unreliable, since the high CPU usage cannot be reproduced in a reliable manner.
Is there a way to produce a thread-dump out of Firefox to see what threads there are running and where they spend their time?
Platform: Mac OS X (if Firefox doesn't have a platform neutral tool here...)