@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

#back-button {-moz-image-region: rect(0px, 24px, 24px, 0px) !important;
list-style-image: url(chrome://browser/skin/Toolbar.png) !important;}
#forward-button {-moz-image-region: rect(0px, 48px, 24px, 24px) !important;
list-style-image: url(chrome://browser/skin/Toolbar.png) !important;}

#back-button:hover {-moz-image-region: rect(24px, 24px, 48px, 0px) !important;}
#forward-button:hover {-moz-image-region: rect(24px, 48px, 48px, 24px) !important;}

#back-button[disabled=true] {-moz-image-region: rect(48px, 24px, 72px, 0px) !important;}
#forward-button[disabled=true] {-moz-image-region: rect(48px, 48px, 72px, 24px) !important;}

#back-forward-dropmarker{display: none !Important;}