Poste aqui seu UserChrome.css

Aqui vai o meu:

/**************************************/ 

/*   Custom Firefox UserChrome.css    */ 

/*            FalledAngel             */ 

/**************************************/





/*<FOR MOSTLY CRYSTAL THEME>*/



/* Change the theme's default Flat Tabs to Native OS Tabs. */

@import url("chrome://global/skin/subskin/nativetabs.css&quot;



/* Change Bookmark Items from default "Star" to "Page" image. */

@import url("chrome://global/skin/subskin/bookmarks-page.css&quot;



/* Change throbber image from default "Penguin" to "Circular". */

@import url("chrome://global/skin/subskin/throbber-circular.css&quot;



/*</FOR MOSTLY CRYSTAL THEME>*/









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











/* Adds a little space between icon and text in the Search bar */

.searchbar-dropmarker

{ margin-right: 2px !important;

 margin-left: 1px !important; 

}







/* Remove a parte de Emails do Menu-Tools */

menuitem[label="New Message..."],

menuitem[label~="Mail"],

menuitem[label="New Message..."] + menuseparator {

display: none !important;

}







/* Remove UNUSED from Tools & Bookmarks */

menuitem[label="Bookmark All Tabs..."],

menuitem[label="DownThemAll"],

menuitem[label="DownThemAll!..."],

menuitem[label="Turbo-dTa!"],

menuitem[label="dTa! Manager..."],

menuitem[label="JavaScript Console"]{

display: none !important;

} 







/* Alterando distancias dos itens da PBT */

#personal-bookmarks toolbarbutton {

margin-left:+2px !important;

}







/* hide separators between toolbars */

#toolbar-menubar {

min-height: 12px !important;

padding: 0px !important;

margin: 0px !important;

border: none !important;

}

#nav-bar {

border: none !important;

padding: 0px !important;

}

#PersonalToolbar {

border: none !important;

}







/* Compacta menus */

menuseparator {

margin: 0px !important;

}