You will need to install a user script manager extension to install this script.
Now supports custom buttons!
A script that adds buttons on Anime Planet, MAL, Kitsu, Anilist and aniDB for searching on Youtube, Google images, Nyaa and AniMixPlay.
If that's not enough for you, now you can add your own buttons! Also you can hide the ones you don't want.
Buttons can auto hide and show only on mouse-over.
Based on Anime Website Buttons script by One Shade.
This script on GitHub.