[Bug 20765]

[Mike Conley]

There's been no activity, nor more useful information added to this bug.
I'm going to mark it RESOLVED INVALID.

For now, if you are continuing to experience performance problems, I'd
suggest using the Gecko Profiler add-on, collecting a profile, sharing
the profile, and then pasting a link to your uploaded profile either in
this bug, or a new bug.

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https://bugs.launchpad.net/bugs/20765

Title:
  firefox hangs when it loads a page in the background

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