best general extensions

MAL-Sync is a powerful extension and userscript, which enables automatic episode tracking between MyAnimeList/Anilist/Kitsu and multiple anime streaming website.

Enhancer for YouTube is a very lightweight extension that is highly customisable, easy to use, and that will greatly improve your YouTube experience!

Annotate with anyone, anywhere Our mission is to bring a new layer to the web. Use Hypothes.is to discuss, collaborate, organize your research, or take personal notes.

make you web search less annoying

This efficient browser add-on blocks ads, trackers, and malware by default employing various filter lists, acting as a comprehensive wide-spectrum blocker.

Returns the ability to see dislike statistics on YouTube.

This is a Firefox add-on which provides the ability to operate tabs as "tree".

Do you often type Markdown code manually for a link or image, or even all tabs in a window, and feel tired? Copy as Markdown can help you!