Disable Youtube™ HTML5 Player

Change the font on Facebook, Twitter, Google, Youtube or any other site. Test Google Web Fonts™.

Beautiful dark mode for Facebook, Google, YouTube, Gmail and more

Group YouTube subscriptions into YouTube folder. Video Deck for Youtube. Mark as watched videos. Filter YouTube video. Youtube mode

YouTube to MP3/MP4 video converter for easy, free and extremely quick downloads.

设置您的默认YouTube™视频质量，支持高清分辨率