Hi, I'm having a problem with 'selected text' style, using userContent.css file with recent Firefox update the next code stop working, seems like Firefox change that behavior:

::selection {
    color: red !important;
    box-shadow: none !important;
    text-shadow: none !important;
    background: blue !important;
}

That code doesn't work in userChrome.css either. Still is possible to change that style? I appreciate any help, thanks.