Marginally Better Polymer

@-moz-document domain("youtube.com") {
#grid-title {
    margin: 0 !important;
}
#contents {
    margin: 0 !important;
}
#contents > ytd-rich-section-renderer {
    display: none !important;
}
#contents > ytd-rich-item-renderer, #items > ytd-grid-video-renderer {
    margin-left: 5px !important;
    margin-right: 0 !important;
    margin-bottom: 5px !important;
    width: 360px !important;
    font-size: 0.8em !important;
}
ytd-thumbnail {
    width: 168px !important;
    float: left !important;
}
yt-formatted-string,
yt-formatted-string > a {
    display: inline !important;
}
#meta {
    padding-left: 5px !important;
    padding-right: 0 !important;
}
#avatar-link {
    display: none !important;
}
h3 {
    margin: 0 !important;
}
#video-title,
#video-title-link {
    font-size: 14px !important;
    font-weight: 500 !important;
    max-height: 60px !important;
    overflow: hidden !important;
    margin: 0 !important;
}
.yt-channel-name,
.ytd-video-meta-block {
    font-size: 11px !important;
}
}