It seems it's broken.

6/17/2025 - extension was working perfectly fine until yesterday for me. now all of a sudden it's not working no matter how many times I try to reload the extension, reload my browser, delete my cache, etc. it's been 7mo since the extension has been updated so that could be an issue. I'll report back if I find a substitute.

Since June, the app has been causing YouTube to malfunction.

terrible

Videos on YouTube lag and play at a low fps since the dev has abandoned this extension.

Just post version 3.0 on a git or something. i think mozilla's review process is terrible too. easily a fav addon, but does not work at all anymore.

Addon breaks uBlock Origin; I get the ad-blocker prompt on Youtube unless I have this disabled.

La version pour Firefox n'est plus mise à jour. Il suffit de la comparer par rapport aux autres navigateurs Internet. Il semble que ce développeur ait renié Firefox... S'il a un problème avec Mozilla ou avec les utilisateurs, ce serait bien qu'il le dise, plutôt que de se cacher derrière un abandon du développement de son application pour Firefox. Sur son site Internet, il reste silencieux à ce sujet.

Enhancer for YouTube adds a wealth of highly useful features and controls to the YouTube experience, significantly improving usability. The functionality offered is genuinely excellent and much appreciated.

However, I'm giving it 1 star due to a critical issue: it is closed-source. This lack of transparency is a major concern. We, the users, cannot verify the code we are running in our browsers. This presents potential security and privacy risks, as there's no way to audit the extension for hidden tracking or malicious behaviour. Trust requires transparency.

I genuinely love what this extension does, and I would instantly change my rating to 5 stars if the developers embraced free and open-source principles.

I strongly urge other users to request this change as well. Open source is vital for user security and trust in browser extensions. Developers, please consider making Enhancer for YouTube open-source. The concept is fantastic, but its closed nature prevents a wholehearted recommendation.

I only use it to set a default resolution for YouTube videos, but it's not working. If I set the resolution to 1080p, it removes 1080p and higher options from the quality settings.

уже пару недель не открываются комментарии в Shorts
помогает только отключение аддона!

völlig unnütz und schädlich ausserdem

estensione inutile non funziona con win 11

Sadly it doesn't work properly anymore as the developer has stopped updating this extension on Firefox.

This was a great add-on until the developer stopped updating it. Now it's interrupting videos for me, and they have decided they won't update to the same version as their other browsers because they don't like the review policy. This is bizarre, since Firefox is the only remaining major browser with a liberal extension API, and most developers are having to burn down their extensions on Chrome instead.

probably needs an update....does not work anymore

This addon no longer functions at all. I don't know if youtube is blocking it or the newest Mercury release broke it.