userContent.css

@-moz-document url("about:newtab"), url("about:home") {
    body {
        overflow: hidden !important;
    }
    #root {
        background-image: url("16.jpg") !important;
        background-size: cover !important;
    }
    /* Hide the ugly logo & wordmark sorry Mozilla */
    .logo-and-wordmark {
        visibility: hidden !important;
    }
    /* Make the search bar rounded */
    #newtab-search-text,
    #searchSubmit {
		border-radius: 50px !important;
	}
	.search-wrapper .search-inner-wrapper {
		margin: 10px !important; }
	.search-wrapper{ padding-top: 9px !important}
}