tooltips script

// browser.chrome.toolbar_tips  true
// tooltips-Test3.uc.js

(function () {
    let sss = Components.classes["@mozilla.org/content/style-sheet-service;1"].getService(Components.interfaces.nsIStyleSheetService);
    let uri = Services.io.newURI("data:text/css;charset=utf-8," + encodeURIComponent(`

        tooltip,
        tooltip[label] {
                appearance: none !important;
                background-color: orange !important;
                border: 2px solid green !important;
                display: flex !important;
                visibility: visible !important;
                opacity: 1 !important;
                }

    `), null, null);
    sss.loadAndRegisterSheet(uri, sss.AGENT_SHEET);
})();