大家帮忙看看这个

大家帮忙看看这个FF3.6的标签栏置顶样式启动后在全屏时怎么会在顶部留下一条大白边



/* Don't Remove */

@namespace url(http://www.mozilla.org/keymaster/gateke ... s.only.xul);
By Sabeur Thabit, Nekrif.com

/* Toolbars with Text only ... Lamers with no Favicon*/

#bookmarksBarContent .toolbarbutton-text
{
margin: 0px 1px 0px 1px !important;
}

#bookmarksBarContent toolbarbutton[container="true"] .toolbarbutton-icon
{

}

#bookmarksBarContent toolbarbutton[container="true"]  .toolbarbutton-menu-dropmarker
{
display: -moz-box !important;
padding-right: 1px !important;
padding-left: 1px !important;
}



/*The Main Juice, Toolbar on Top:*/

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

{
.tabbrowser-strip
{
position:fixed;
top:0px;
width:100%!important;
z-index:0;
}

tab
{
-moz-user-select:-moz-none!important;
z-index:1!important;
-moz-border-radius-bottomleft: 0px!important;
}

.tabbrowser-strip .tabbrowser-tabs
{
width:100%!important;
}

.tab-drop-indicator-bar
{
position:fixed!important;
top:0px;
left:0px;
width:100%!important;
z-index:2;
}

window

{

padding-top:23px;

}
}