otoDB 作者： MMaker

A companion extension for otoDB to quickly add new works from YouTube, Niconico, Bilibili, and SoundCloud. Additionally, this extension bypasses geo-blocks on Niconico! (Assuming you have an account.)

Niconico geo-block bypass not working?
Visit https://account.nicovideo.jp/my/account and make sure the Display Settings toggle located at the bottom of the page is set to ON! (reference image)