There is a combined Stop/Reload/Go button that is positioned at the right end of the location/address bar. *Stop button: while the page is loading *Reload button: when the page has finished loading *Go button: when you modify the location/address bar content *Middle-click the Reload button to duplicate the current tab to a new tab ----- 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 See also: *https://support.mozilla.org/kb/customize-firefox-controls-buttons-and-toolbars