It seems that if I run firefox3.0, close it, and then run firefox3.5,
the later thinks that firefox is still running. After removing
firefox3.0 the problems continues. After removing firefox3.0 AND
rebooting the problem is gone.
As no one is reporting the same bug over the Internet (according to
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/32935993/Dependencies.txt
** Attachment added: ExtensionSummary.txt
http://launchpadlibrarian.net/32935994/ExtensionSummary.txt
** Attachment added: KernLog.txt
http://launchpadlibrarian.net/32935995/KernLog.txt
**
