@-moz-document url("chrome://browser/content/browser.xul") {

.tabbrowser-strip .tabbrowser-tab:nth-child(1):before {
content: "[1]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

.tabbrowser-strip .tabbrowser-tab:nth-child(2):before {
content: "[2]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

.tabbrowser-strip .tabbrowser-tab:nth-child(3):before {
content: "[3]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

.tabbrowser-strip .tabbrowser-tab:nth-child(4):before {
content: "[4]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

.tabbrowser-strip .tabbrowser-tab:nth-child(5):before {
content: "[5]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

.tabbrowser-strip .tabbrowser-tab:nth-child(6):before {
content: "[6]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

.tabbrowser-strip .tabbrowser-tab:nth-child(7):before {
content: "[7]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

.tabbrowser-strip .tabbrowser-tab:nth-child(8):before {
content: "[8]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

.tabbrowser-strip .tabbrowser-tab:last-child:before {
content: "[9]";
font-weight: bold;
background: Highlight;
color: HighlightText;
width: 16px;
height: 16px;
padding: 1px;
margin-left: 2px;
-moz-border-radius: 6px;
display: -moz-box;
}

}