dark_context_menus.css

/* Makes context menus dark. Also affects some portions of menu popups */
/* Uses dark theme colors but does not respect dark theme variables (they wouldn't work on sidebar context menu) */

:root {
    --uc-menu-bkgnd: rgb(20, 20, 20);
    --uc-menu-color: rgb(230, 230, 230);
    --uc-menu-dimmed: rgba(255, 255, 255, 0.1);
    --uc-menu-disabled: rgb(50, 50, 50);
  }
  panel richlistbox,
  panel tree,
  panel button,
  panel menulist,
  panel textbox,
  panel input,
  menupopup,
  menu,
  menuitem {
    -moz-appearance: none !important;
  }
  
  menulist,
  menuitem,
  menu {
    min-height: 1.8em;
  }
  
  panel menulist {
    border: 1px solid transparent;
  }
  
  panel richlistbox,
  panel tree,
  panel button,
  panel menulist,
  panel textbox,
  panel input,
  panel #searchbar,
  menupopup:not(#BMB_bookmarksPopup),
  #main-menubar > menu > menupopup,
  #context-navigation {
    color: var(--uc-menu-color) !important;
    padding: 2px;
    background-color: var(--uc-menu-bkgnd) !important;
    border-color: var(--uc-menu-disabled) !important;
  }
  
  panel textbox input {
    padding: 2px !important;
  }
  
  panel input {
    border-width: 1px;
    border-style: solid;
    background-color: rgba(0, 0, 0, 0.1) !important;
  }
  panel #searchbar {
    background-color: rgba(0, 0, 0, 0.1) !important;
    padding: 0 !important;
  }
  panel #searchbar input {
    background-color: transparent !important;
  }
  
  panel menulist:hover,
  panel menulist[open] {
    border-color: Highlight !important;
  }
  
  #editBMPanel_folderMenuList > menupopup > menuitem {
    color: var(--uc-menu-color) !important;
  }
  
  panel treechildren::-moz-tree-row(selected),
  panel button:hover,
  menu:hover,
  menu[_moz-menuactive],
  menu[open],
  menuitem:hover,
  menuitem[_moz-menuactive] {
    background-color: var(--uc-menu-dimmed) !important;
    color: inherit !important;
  }
  
  menu[disabled='true'],
  menuitem[disabled='true'] {
    color: var(--uc-menu-disabled) !important;
  }
  
  menu:not(.subviewbutton) > .menu-right {
    filter: invert(1);
  }