Okay, thanks for trying it. I'm at work now using my phone, but I'll try to Google around for some possibilities, but I may be off and on due to work.@atanere:
firefox safe mode doesn't help, still can't access most websites.
About Flash updates.... don't try their website to update even when things are working properly. Just update Linux Mint and it should fix Flash too. In fact, try running updates now and see what happens. Does it access the web and update properly? Trying to determine if only browsers are broken, or everything that connects to the web.