Seit dem neuesten Release 132 funktioniert die Sidebar per hover nicht mehr

@-moz-document url("chrome://browser/content/places/bookmarksSidebar.xhtml"),
               url("chrome://browser/content/browser.xhtml") {

#sidebar-box {
        position: absolute !important;
        top: 146px;
        bottom: 1px;
        width: 230px !important; 
        z-index: 100 !important;
        opacity: 0 !important;
        margin-left: -229px !important;
        transition: margin-left .5s linear .4s, opacity .6s ease-in .2s !important;
	}

#sidebar-box:hover {
        opacity: 1 !important;
        margin-left: 0 !important;
        transition: margin-left .66s !important; 
    }
}