You can inspect and manage the permissions for the domain in the currently selected tab via these steps: *Click the "Site Identity Button" (globe/padlock) on the location bar *Click "More Information" to open "Tools > Page Info" with the Security tab selected *Go to the Permissions tab (Tools > Page Info > Permissions) to check the permissions for the domain in the currently selected tab You can also check the cookie exceptions. *Tools > Options > Privacy > Firefox will: "Use custom settings for history" ---- Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance). *Do NOT click the Reset button on the Safe Mode start window. *https://support.mozilla.org/kb/Safe+Mode *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

You may also want to see the [[Websites say cookies are blocked - Unblock them]] article.