Overall great but as of Nov 14 there's been a bug with this causing videos/streams to just STOP playing. Not pause, stop. I have to refresh the entire page to make them work again. It works fine on chrome and for firefox I narrowed it down to this extension - everything is fine once I disable this.

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It is better now, but not working in all YouTube tabs... IDK why, but I use Firefox Nightly, maybe that was not tested in this Browser. So please include Nightly in compatibility list.

As mentioned in a below review, Enhancer currently breaks Sponsorblock. You have to revert to version 2.0.126.1 to fix the issue. For anyone trying to do that, here's how: on the addons page (here) scroll down to "More information" and press "see all versions" to get access to previous versions, then select version 2.0.126.1.

Sadly it's broken right now...

version 2.0.128 not working properly

I like it

Amazing and extremely useful add-on which truly enhances YouTube. However since the latest update Enhancer often won't show up and boost the volume. Please fix this.

The latest 2.0.128 update seems to conflict with SponsorBlock as the latter no longer skips skippable segments in videos when 2.0.128 is installed. I installed the previous 2.0.126.1 and this fixed it.

stopped working

Latest update broke the addon for me!

Love the extension, but it recently seems to have completely broken. It's probably related to youtube changes, as even UBO has been struggling to block ads. I consider this pretty much essential for watching youtube now, and it always sucks when it breaks like this.

Latest update broke the addon for me and I had to reinstall it.

In the latest version the speed auto-setting started to work strangely. Previously it was enough to set 1x again in playlists and before restarting the browser all playlist videos would have 1x speed. Now, when loading each new video from playlist, the speed is set from the default settings, which is inconvenient: you have to open the settings and reset the values in order to listen to a playlist of music.

Since last version - 2.0.128 - "Prevent videos loaded in background tabs from automatically playing" is also blocking foreground videos autoplay - "Prevent videos loaded in the foreground tab from automatically playing as well" is unchecked.

Version 2.0.128 does seem to not work properly still. Ads happen, also some of the features are missing too. for ex: no extra buttons and player does not go full cinema mode etc.

Version 2.0.128 does not block Ads anymore.
The one I have installed on my Firefox browser also keeps randomly "pausing" the video playback and I have to click on Play once and over again