Tabbox - Archive of obsolete content
examples: .tabs-closebutton { list-style-image: url(http://mozilla.org/favicon.ico); } .tabs-closebutton { list-style-image: url("chrome://global/skin/icons/close.gif"); } ...

closebutton - Archive of obsolete content
you can set an image to the "new tab" and "close" buttons by applying them to the tabs-newbutton and tabs-closebutton classes respectively.

tabs - Archive of obsolete content
you can set an image to the "new tab" and "close" buttons by applying them to the tabs-newbutton and tabs-closebutton classes respectively.