Has ads. They even bypassed my ad-blocker.

Mah...it doesn't work on mobile (android)
that's the only instance I personally find really convenient to be able to change video quality since firefox built in player sucks.

It slowed my browser to a crawl. Youtube videos were loading incredibly slow.

This is THE most annoying thing in that will not stay functional all day! It clears itself during or after use and I have to go back and reload it every, single time!

Where the f is option to remove Keyboards shortcuts icon from video player ?

Next video is automatically paused after loading, despite having every option related to autoplay allowing it. Not sure how to create an issue request, hope you see it here. I'll change my rating later.

Adjusted font to be too opaque in search window. spent an hour trying to fix it. Failed. Couldn't. No documentation on your add-on about adjusting it either. No idea how to make it so my font isn't 95% opaque while searching for a video.

I am sorry but there is a persitent cookie linked to this addon.

When i start a session and i go directly in my setting i fond a youtube.com cookie.

My FF clears cookies at the end of the session so there should no cookie at all at the beginning of a session.

I couldnt find info about that youtube.com addon cookie on the developer website.

Thanks for explaining why this cookie is created when the browser loads all the addon and when i start to use youtube.

Never blocked a single ad. Cannot understand what this thing does.

réservé aux ingénieur informatique

Use to be great, but now I'm getting white masked coverup ads for grammarly. At the start for every video.