'3-bar' menu button > '?' button > Restart with Add-ons Disabled.You can restart Firefox in Safe Mode using either: More info: Diagnose Firefox issues using Troubleshoot Mode. That's a standard diagnostic tool to deactivate extensions and some advanced features of Firefox. Have you tried disabling it? One way would be to test the same pages in Firefox's Safe Mode.
Last year, a user discovered that extension can cause problems with Flash. The crash report seems to show Hola Unblocker running. Hi gforcewarp9, as you can see, the first one of those is easily clickable to access the report, but the others may require an extra step on your part: can you click them on the about:crashes screen and then copy/paste the URLs of those report pages into a reply? If they are all basically the identical report (startup crash with the 'hang | signature) then I'm not sure it would provide much more information to post those links.