Und das ist der CSS Code für die Icons:
CSS
#ExtraConfigMenu-button > dropmarker, #ExtraConfigMenu-button > hbox > .toolbarbutton-menu-dropmarker {
display: none!important;
}
menuitem[label=" Scriptliste in Zwischenablage "]{
-moz-binding:
url("chrome://global/content/bindings/menu.xml#menuitem-iconic") !important;
list-style-image: url("data:image/gif;base64,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") !important;
-moz-image-region: rect(0px 16px 16px 0px) !important;
padding-left:6px!important}
menuitem[label="Scriptliste in Zwischenablage"]>.menu-iconic-text{
padding-left:0px !important;}
#ExtraConfigMenu-button{
list-style-image: url("data:image/gif;base64,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") !important;
margin-right:2px!important;
-moz-image-region: rect(0px 16px 16px 0px) !important;}
.uProfMenu_ucjs,.uProfMenu_ucxul{
-moz-binding:
url("chrome://global/content/bindings/menu.xml#menuitem-iconic") !important;
list-style-image: url("data:image/gif;base64,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") !important;
padding-left:5px !important;
-moz-image-region: rect(0px 16px 16px 0px) !important;}
.uProfMenu_ucjs>.menu-iconic-text,
.uProfMenu_ucxul>.menu-iconic-text,
#submenu-ucjs>.menu-iconic-text,
#submenu-ucxul>.menu-iconic-text{
padding-left:8px !important;}
#submenu-ucjs,#submenu-ucxul{
-moz-binding:
url("chrome://global/content/bindings/menu.xml#menu-iconic") !important;
list-style-image: url("data:image/gif;base64,R0lGODlhEAANAJECAP7/AFFRUQAAAAAAACH5BAEAAAIALAAAAAAQAA0AAAInlI+ZwawYgJThiThnawbnD1QXCFbbuYUjSUUmqzkry820aJcQegoFADs=") !important;
padding-left:5px !important;
-moz-image-region: rect(0px 16px 16px 0px) !important;}
.uProfMenu_folder{
-moz-binding:
url("chrome://global/content/bindings/menu.xml#menuitem-iconic") !important;
list-style-image: url("data:image/gif;base64,R0lGODlhEAANAJECAP7/AFFRUQAAAAAAACH5BAEAAAIALAAAAAAQAA0AAAInlI+ZwawYgJThiThnawbnD1QXCFbbuYUjSUUmqzkry820aJcQegoFADs=") !important;
padding-left:5px !important;
-moz-image-region: rect(0px 16px 16px 0px) !important;}
.uProfMenu_folder>.menu-iconic-text{
padding-left:8px !important;}
.uProfMenu_edit{
-moz-binding:
url("chrome://global/content/bindings/menu.xml#menuitem-iconic") !important;
list-style-image: url("data:image/gif;base64,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") !important;
padding-left:5px !important;
-moz-image-region: rect(0px 16px 16px 0px) !important;}
.uProfMenu_edit>.menu-iconic-text{
padding-left:8px !important;}
#submenu-about{
-moz-binding:
url("chrome://global/content/bindings/menu.xml#menu-iconic") !important;
list-style-image: url("data:image/gif;base64,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") !important;
padding-left:5px !important;
-moz-image-region: rect(0px 16px 16px 0px) !important;}
#submenu-about>.menu-iconic-text{
padding-left:8px !important;}
.uProfMenu_about{
-moz-binding:
url("chrome://global/content/bindings/menu.xml#menuitem-iconic") !important;
list-style-image: url("data:image/gif;base64,R0lGODlhEAAQANU5AP///+35/8Dm/wAjkQBUxABayABWxAAZib3l/4XN/wBiyIXR/wAbiez4/wBdyQBfyABfywCf/wCj/wBiygBgyABkzgBVxP8pAAAkkABg1gBXxgBWyABc1I/U/4rS/wAbjQBnzwBKsQAbio/Q/wAhmQAaif8lAABr2P8sAABJs4rU/wBo1oPZ/4PV/wBizABp2YrO/wBLsgBgyYrR/wBGrgBlywBkzABo2AAkmf///wAAAAAAAAAAAAAAAAAAAAAAACH5BAEAADkALAAAAAAQABAAAAaFwJxwSCzmarKH8kFRKJoK1+0FmswS2AQsEhlxW6bLaqIhmM0GgyW94WQqDoB8Tqc7CgCEYM/vIwAFeA0BhIWGDYAQdYtzEDQiB5GRDAwllB8kOCk2KgueCx4SEh2iLBcoJ2RnaGpsbnCMjHd5fbUCf4EAg4a8iAWKsXUQIRgDxsfIxhgxQQA7") !important;
padding-left:5px !important;
-moz-image-region: rect(0px 16px 16px 0px) !important;}
.uProfMenu_about>.menu-iconic-text{
padding-left:8px !important;}