The script you requested has been deleted, but here are some related scripts.
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MAL English Titles JS - Add English Titles to various MyAnimeList pages, whilst still displaying Japanese Titles
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Douki JS - Import Anime and Manga Lists from Anilist (see https://anilist.co/forum/thread/2654 for more info)
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All the anime top buttons JS - All the anime top buttons (has MAL-Sync support)
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MyAnimeList(MAL) - Recommendations direct link JS - When you click on a recommendation picture in a anime/manga page, you go directly to the anime/manga and not the recommendation page.