You can check in "Options/Preferences > Search" (about:preferences#search) if there is a search engine selected. If necessary the click "Restore Default Search Engines". See also: *https://support.mozilla.org/kb/Search+bar ----- Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox menu button/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem. *Switch to the DEFAULT theme: Firefox menu button/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

This has not helped the problem