Try to create a new Boolean pref on the about:config page via the right-click context menu with the name <b>layout.paint_rects_separately</b> and set the value to true and leave hardware acceleration enabled. You can open the <b>about:config</b> page via the location/address bar and you can accept the warning and click "I'll be careful" to continue. *http://kb.mozillazine.org/about:config Try to disable hardware acceleration in Firefox. *Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available" You need close and restart Firefox after toggling this setting. *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes *https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration