/* Hide the top tabs toolbar. 
   To install this: 
       * Go to your Firefox profile folder (look in %appdata%/Mozilla/Firefox/Profiles)
       * Create a 'chrome' folder and place this there.
       * In Firefox, go to about:config and set `toolkit.legacyUserProfileCustomizations.stylesheets` to true. 
       * Restart the browser.
*/
#TabsToolbar {
	display: none !important;
}