Firefox 95 show close button on tabs

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

/* show close button on hover */
#tabbrowser-tabs[closebuttons="activetab"]
 .tabbrowser-tab:not([selected]):not([pinned]):hover .tab-close-button {
  display: -moz-inline-box !important;
}

/* make the close button more clearly visible on hover */
.tab-close-button:hover {
    background-color: rgba(255,0,0,.7) !important;
    fill: white !important;
}