This add-on implements a carefully curated collection of the most useful and most requested media sites. The embedded media sites are responsive where applicable and lazy-loaded to improve their performance and efficiency. This add-on contains the definitions for 118 media sites: ABC News, Amazon Product, audioBoom, Audiomack, Bandcamp, BBC News, Bleacher Report videos, Break, Brightcove, CBS News Video, CNBC, CNN, CNNMoney, CollegeHumor, Comedy Central, Coub, Dailymotion, Democracy Now!, dumpert, 8tracks, ESPN, Facebook, Flickr, Fox News, FOX Sports, Funny or Die, Gamespot, GameTrailers, Getty Images, Gfycat, Gifs.com, GitHub Gist, Global News, GoFundMe, Google Drive, Google+, Google Sheets, Healthguru, Hudl, Hulu, HumorTV, IGN, IMDb, Imgur, Indiegogo, Instagram, Internet Archive, ?zlesene, JW Platform, Kontinental Hockey League (КХЛ), Kickstarter, Libsyn, LiveCap, Liveleak, Livestream, Mail.Ru, Medium, Metacafe, Mixcloud, MLB, MRCTV, MSNBC, National Geographic Channel, National Geographic Video, NBC News, NBC Sports, NHL Videos and Highlights, NPR, The New York Times Video, Orfium, Pastebin, Pinterest, Plays.tv, Podbean, Prezi, Reddit threads and comments, Rutube, Scribd, SlideShare, SoundCloud, Sportsnet, Spotify, Steam store, Stitcher, Straw Poll, Streamable, Streamja, Team Coco, TED Talks, Telegram, The Atlantic Video, The Guardian (obsolete), The Onion, TikTok, TinyPic videos, TMZ, Trailer Addict, Tumblr, Twitch, Twitter, Ustream, VBOX7, Veoh, Vevo, Video Detective, Vimeo, Vine, VK, Vocaroo, Vox, Washington Post Video, WorldStarHipHop, The Wall Street Journal Online, XboxClips, Xbox DVR, Yahoo! Screen, Youku, YouTube.