What happens if you try to open a New Private Window? Note that when you are in permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History) that all windows you open are automatically Private Browsing mode windows and you won't see a notification. To see all History and Cookie settings, choose: *Options/Preferences -> Privacy -> Firefox will: "Use custom settings for history" *https://support.mozilla.org/en-US/kb/Options+window+-+Privacy+panel ---- Start Firefox in <u>Safe Mode</u> to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem. *switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance *do NOT click the "Refresh Firefox" button on the Safe Mode start window *https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode *https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems