Great project overall! With this extension, MyAnimeList looks much better as compared to its usual non-modern style.

I did encountered a few visual issues though:

1. When I hover over the Anime tab, the Watch, Read and Help tabs are visible behind the Anime tab's dropdown.

2. I dont know if it is a 'me' problem but, the height of the Search bar is marginally larger than others, making it feel really off so please try to fix that as well.

I dont know if whether this review is really useful or not as the last update date was apparently 4 years ago but, still wanted to show my appreciation and concerns.