Firefox: run each tab in an own thread and show CPU-usage of each tab
Sometimes, in some tab, there is some JS code, Java applet, Flash object or whatever, which slows down or freeze whole Firefox.
I would like to know which tab this is (which is slowing down everything) to close it.
I would also like to be able to use Firefox even if there is a tab which is taking all CPU. Therefore, every tab should be run from within an own thread.