Tùy biến nút close tab Firefox

* Fix styling for close button size */
.tab-close-button {-moz-image-region: rect(0 56px 14px 42px) !important;}

/* Change close button to red on current tab only for non-protected tabs */
tab:not([protected="true"]) .tab-close-button[selected="true"] {-moz-image-region: rect(0 14px 14px 0) !important;


.tab-close-button {
background-color: #ffffff !important;
-moz-border-radius: 0px;
}


/* Change close button to red on current tab only for non-protected tabs
tab:not([protected="true"]) .tab-close-button[selected="true"] {-moz-image-region: rect(0 14px 14px 42px) !important;}

/* Change close button to X on hover only for non-protected tabs */
tab:not([protected="true"]) .tab-close-button:hover {background-color: #ffffff !important;}*/

tab{ -moz-appearance: none !important; }

tab[selected="true"] {
background-color: #AACCFF !important; /* light blue */
color: #000 !important; /* black */
}

tab:hover {
background-color: #FFFFCC !important; /* light yellow */
color: #000 !important; /* black */
}