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[madbiologist <762366@xxxxxxxxxxxxxxxxxx>]

** Tags added: natty

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https://bugs.launchpad.net/bugs/762366

Title:
  Firefox 4.0 addons page very slow

Status in “firefox” package in Ubuntu:
  New

Bug description:
  Every time I open and/or scroll about:addons page system becomes unresponsible for about 5-10 seconds.
  Through conky I see that Xorg takes all CPU resources.
  I tried:
  - removing ~/.mozilla ,
  - downloading official build of firefox 4.0, 
  - force disabling and force enabling WebGL, 
  - disabling/enabling some compiz plugins,
  - deleting libmoon (which is incompatible with 4.0 at this moment) 
  - exporting MOZ_DISABLE_PANGO=1 before starting firefox (advice from old bugreports)
  and nothing helped.
  The problem disappears right after I close addons page. But it also takes about 3-4 seconds to close the page.
  I have something about 30 addons in total (without them problem still exists).
  I believe it may be somehow connected to the usage of nouveau drivers (I have Nvidia GeForce FX5200 GPU).

  Release: Ubuntu Natty 11.04 (development branch)
  firefox: 4.0+nobinonly-0ubuntu1
  unity: 3.8.8-0ubuntu2
  xorg: 1:7.6+4ubuntu3
  compiz:1:0.9.4+bzr20110415-0ubuntu1
  uname -a: 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686 i686 i386 GNU/Linux

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