Starting yesterday AM, Firefox began crashing on several sites, including Facebook (main page) and Gawker Media (any article). When I load Firefox in safe mode, it still crashes on these pages. When I disable JavaScript, it does not crash, but of course this prevents a lot of content from functioning. I've never had this problem with Firefox in the past, and I'd really rather make Firefox work rather than switching to another browser. I've run a malware bytes check (on latest malware bytes version), came up clean. I don't have any new add ons or plug-ins, and I don't think I've installed any new software recently. I'm going to run a disk check next. Any ideas?