Kontextmenü vom UserStyles Button CSS-Code shrinken

/***** POPUP und KONTEXT Menus ******/

/* Hintergrund/Umrandung/Ausrichtung - aller Popup */

menupopup {
   background: #87cefa !important; /* Hintergrund */
}

/* Vorgegebene Breite der Popup-Fenster */

.menupopup-arrowscrollbox,
menupopup, 
popup {
   appearance: none!important;
   width: 250px !important; /* Breite in px anpassbar */
} 

/* vorgegebene Höhe der Zeilen */
menupopup > menu ,
menupopup > menuitem,popup > menu ,
popup > menuitem  {
    appearance: none!important;
    min-height: 34px !important; /* Höhe in px anpassbar */
    max-height: 34px !important;
}

  .searchbar-textbox, #urlbar {
    border-radius: 20px !important;
    min-height: 33px !important;
    padding: 0 !important;
    margin: 0 2px !important;
    }

/************* SEPARATOREN ***********************/

/* Separatoren werden entfernt (Querlinien) */
menuseparator {
    display: none !important; 
}
    
/************ KONTEXT-MENÜ ****************************

/* Icon Farbe */

#context-navigation > menuitem > hbox.menu-iconic-left {
    appearance: none !important;
    color: #3300ff ! important; /* Farbe */
    font-size: 15px !important;
    padding: 0px  4px 0px 4px !important; /* Ausrichtung */
}

/* Hintergrund hinter den Icons */

#context-navigation {
    background: activecaption !important; /* Farbe */
    padding: 4px  4px 4px 4px !important; /* Ausrichtung */
}

/****************** MENÜBAR ********************/


:is(menu,menuitem):not(#context-navigation > .menuitem-iconic):hover {
  background-color: lightblue !important;
} 

/*Höhenverschiebung Menülleiste durch Hovereffekt verhindern*/

#main-menubar {
    height: 28px !important;
}

    /* UserStyles Loader Button */
    
    #usercssloader-menu {
    margin-right: 0 !important; 
    margin-left: 0 !important;
    content: '' !important;
    display: block !important;
    width: 15px !important;
    height: 20px !important;
    background-image: url("data:image/png;base64,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") !important;
    background-repeat: no-repeat !important;
    background-position: -1px 6px !important;
    background-size: 15px 15px !important;
    }
    
    #usercssloader-menu > .menu-text,
    #usercssloader-menu > .menu-right {
    display: none !important;
    }
    
    #usercssloader-menu:hover {
    margin-right: 0 !important; 
    margin-left: 0 !important;
    content: '' !important;
    display: block !important;
    width: 15px !important;
    height: 20px !important;
    background: lightgrey !important;
    background-image: url("data:image/png;base64,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") !important;
    background-repeat: no-repeat !important;
    background-position: -1px 6px !important;
    background-size: 15px 15px !important;
    }
    
    #usercssloader-menu > .menu-text,
    #usercssloader-menu > .menu-right {
    display: none !important;
    }