It seems like your issue could be related to your browser's cache or some extensions interfering with your browsing. Try clearing the cache and cookies, which can often resolve loading problems. Another step is to run Firefox in Troubleshoot Mode (Help > Troubleshoot Mode), which disables extensions to identify if any of them are causing trouble. You might also want to disable hardware acceleration in the settings (Settings > General > Performance). Ensure your Firefox is updated, as new updates can fix bugs. If you're still facing issues, creating a new profile could help eliminate deeper problems. Hopefully, these steps get you back on track with Firefox!