Due to some unknown reason from today morning whenever I use paste function, my Firefox crashes and quits. It includes pressing ctrl+v, right click and paste, and edit>paste. It occurs in all webpages and not only with texts, but also when I try to copy/paste for example a bookmark. My browser is up to date, I rebooted several times, and also opened Firefox in Troubleshoot mode. But the crash still happens. Does anyone have any idea what the reason of this problem is and how I can fix it?