[Bug 90140] Re: Firefox Freezes opening tabs or windows

[Alexander Sack]

in order to let us work out a testcase, its important that you try if
your problem is a) reproducible and b) if it is due to an extension.

For b) try running firefox in -safe-mode:

  # firefox -safe-mode

and see if it goes away. If so, try disabling extension s one by one to
find the bad extension and let us know which one caused the troubles.

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Firefox Freezes opening tabs or windows
https://launchpad.net/bugs/90140