Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

When I have a lot of web pages open in Firefox, sometimes the Firefox cpu usage can grow to 95% or more, making all of the pages slow. I've noticed that closing pages on certain sites can significantly lower the cpu usage but it is just a trial and error process, and I don't really want to close the pages if they aren't using significant cpu.

Is there some way to determine which pages (or add-ons) are using the most cpu, so that I can concentrate on closing those? Or some way to stop pages that are not even on visible tabs from using the cpu at all?

I've looked for a Firefox add-on that could report the information but haven't found any, and some add-ons I've tried such as Firebug actually seem to make the cpu usage far worse.

I am using Firefox on Mac OS X.

share|improve this question
up vote 1 down vote accepted

You could use Chrome for this. It has the ability to tell you how much memory is consumed by each tab individually. Chrome for Mac.

alt text

share|improve this answer
He's on Mac OS X. He can't use chrome yet. – scheibk Jul 16 '09 at 19:10
Stats for nerds... that's funny. (What's in there?) – Zifre Jul 16 '09 at 19:11
Sure he can. It's just not officially available. – Sampson Jul 16 '09 at 19:12
Chrome for Mac: – Sampson Jul 16 '09 at 19:13
@Zifre -… – Sampson Jul 16 '09 at 19:15

Firefox 4.x should add multiprocess support, which should solve your problem

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .