To fix some css issues (like YouTube Offline Slate Background)
As of
.html5-endscreen.ytp-show-tiles ~ .ytp-offline-slate .ytp-offline-slate-background {
background-image: none !important;
}
.more-button.ytd-comment-replies-renderer > #creator-thumbnail {
margin: 4px 8px;
line-height: 100%;
}