GitHub repository: Edddy/Rottentomatoes-userscript
Description: Show Rotten Tomatoes score on imdb.com, metacritic.com, letterboxd.com, BoxOfficeMojo, serienjunkies.de, Amazon, tv.com, Google Play, allmovie.com, Wikipedia, themoviedb.org, movies.com, tvmaze.com, tvguide.com, followshows.com, thetvdb.com, tvnfo.com