So FireFox just randomly stopped working all of a sudden. It cant load any web page what so ever. (Like there is no internet, except that other browsers work normally.) Ive tried everything from the support page, (Disabled all of the protection in firefox itself, removed and added it back in onto firewall safe-list), ive refreshed it (the option before removing), and Ive reinstalled it as well. Nothing seems to fix the issue, the only way I got it working, and it was just for a little while before it blocked up again, is by running it in safe mode with SHIFT key. But it opened youtube, and then blocked up again. I have not installed any anti malware programs or anything new that would cause the issue, neither have i updated my system recently. When i reinstalled firefox (and started it completely blank and new) I started getting "sec_error_unknown_issuer" on every website I tried to open. And now, every time I close firefox (still does not work) after like 15 seconds post closing it I get a "Firefox has crashed" report. Real shame. Great browser, been using it for ages :(