Firefox user CSS sync

userContent.css

/*
 * Since it's difficult or impossible to synchronize user CSS, I'm using this to manually
 * update changes across all my browsers.
 *
 */


@-moz-document domain(www.amazon.com) {

    /* delete the Rufus auto-popup */
    div#nav-flyout-rufus   {
        display: none !important;
    }

    /* delete the strip that's pure advertisement */
    div#percolate-ui-ilm_div {
        display: none;
    }

}