I am stuck in a loop: I click on the Firefox icon, and the Crash Report Window opens.

Sorry to hear about this problem and thank you for the report links. When I click through, there doesn't seem to be much actionable data available for these crash signatures ([@ js::ClassSpec::defined ], [@ JSClass::getOpsGetProperty ]). Maybe another volunteer can see more there. Have you tried starting in Firefox's Troubleshoot Mode? In that mode, Firefox temporarily deactivates extensions, hardware acceleration, any userChrome.css/userContent.css files, and some other advanced features to help you assess whether these are causing the problem. Exit/Quit Firefox from the Crash reporter instead of using Restart. Then: Hold down the Shift key when starting Firefox. A small dialog should appear. Click the Open button. ''Note: Don't use the Refresh without first reviewing this article to understand what will be deleted:'' [[Refresh Firefox - reset add-ons and settings]]. Any difference? Ref. [[Diagnose Firefox issues using Troubleshoot Mode]]