Oh, doch geschafft!
JavaScript
...
var css =`
#undo-close-tab-list > menuseparator {
display: none !important;
}
`;
var sss = Cc['@mozilla.org/content/style-sheet-service;1'].getService(Ci.nsIStyleSheetService);
var uri = makeURI('data:text/css;charset=UTF=8,' + encodeURIComponent(css));
sss.loadAndRegisterSheet(uri, sss.AGENT_SHEET);
setTimeout(function() {
UCT.init();
},250);
Alles anzeigen