Im having this error as well. I need firefox2 in order to use Selenium.
It currently only supports Firefox2.
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Firefox segmentation fault on startup
https://bugs.launchpad.net/bugs/197577
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Sorry but Firefox-2 is getting near EOS and they wont be fixing anything
but major issues security issues mainly. Please try to reproduce this
with Firefox-3.0 if you can reproduce this bug please click on Help
Report a problem and file the bug that way. This does not mean that it
wasn't already
** Attachment added: Firefox profile for reproducing the bug
http://launchpadlibrarian.net/12349736/firefox-profile.tgz
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/12349737/Dependencies.txt
** Attachment added: ExtensionSummary.txt
