Anything useful in the Browser Console? *https://firefox-source-docs.mozilla.org/devtools-user/browser_console/ You can create a new profile as a quick test to see if your current profile is causing the problem. See "Creating a profile": *https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles If the new profile works, you can transfer files from a previously used profile to the new profile, but be careful not to copy corrupted files to avoid carrying over problems. *https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

You could try [https://firefox-source-docs.mozilla.org/performance/reporting_a_performance_problem.html recording a performance profile].

''<p>zeroknight [[#answer-1636589|ha dit]]</p>'' <blockquote>You could try [https://firefox-source-docs.mozilla.org/performance/reporting_a_performance_problem.html recording a performance profile]. </blockquote> I tried but I couldn't see the report. I got the window that I have attached.