My first recommendation is to try restarting your computer. As stupid as it may sound, these types of issues often get corrected when the computer restarts. If that doesn't help, try going to the <code>about:config</code> page in Firefox and setting the <code>toolkit.legacyUserProfileCustomizations.stylesheets</code> preference to <code>false</code> by pressing the little toggle button on the right-side of the preference. Then try restarting Firefox and see if the issue goes away. Hope this helps, Judith.