Comment 30 for bug 875538

A much easier work-around for most cases is the attached script that runs 'pkill firefox'.

Save it to your desktop, check its contents are not malicious (you always do that, right?) and change permissions to be executable.

Then if you get the warning about not being able to re-start firefox, just double-click and run the script, then try again. As a normal user you can't kill the processes of other logged-in users, so if there are other sessions of firefox running for others they won't get stopped.

I don't like the idea of regressing Flash, as most updates are important fixes for its Swiss cheese security. Linux is not immune to hacking! Even though Windows get the most attention, one should never ignore security patches for internet-facing software on ANY system..