[Bug 213016] [NEW] [regression] firefox becomes often unresponsive for long periods of time (in particular when playing flash).

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Firefox started to become very unresponsive lately (past days). The
problem may not be in firefox as miro 1.2 exhibits the same problem. It
looks like an X interaction issue because compiz is taking some CPU as
well.

WRT firefox, it often starts taking 100% CPU (and sometimes more - 2
cores system) for 30 seconds or more. This happens often when playing
videos: on youtube with flash. Video starts skipping, etc... Miro
sometimes displays some warnings. I haven't tried with another video
player (vlc) to see if they also have problems.

I have no idea how to debug this further as usually I can't do anything
(e.g. strace firefox) until the system becomes responsive again.

** Affects: firefox-3.0 (Ubuntu)
     Importance: Undecided
         Status: New

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[regression] firefox becomes often unresponsive for long periods of time (in particular when playing flash).
https://bugs.launchpad.net/bugs/213016
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