Please explain the problem in detail. What happens? Error messages?

If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block (wanted) content (Adblock Plus, NoScript, Disconnect, Ghostery, Privacy Badger, uBlock Origin) always make sure such extensions do not block (wanted) content. *make sure your extensions and filters are updated to the latest version You see the shield icon at the left end of the location/address bar in case content is blocked by Tracking Protection. *click the shield icon for more detail and possibly disable the protection *check the Web Console for more detail about what content is blocked by Tracking Protection *"3-bar" menu button or Tools -> Web Developer *https://support.mozilla.org/en-US/kb/tracking-protection-firefox ---- You can try these steps in case of issues with web pages: You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files. *hold down the Shift key and left-click the Reload button *press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux) *press "Command + Shift + R" (Mac) Clear the Cache and remove the Cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences). "clear the Cache: *Options/Preferences -> Privacy & Security -> Cached Web Content: "Clear Now" "Remove the Cookies" from websites that cause problems. *Options/Preferences -> Privacy & Security -> "Use custom settings for history" -> Cookies: "Show Cookies" 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 <u>hardware acceleration</u> 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