Just works, and the most recent update added an aesthetically pleasing UI enhancement that's really easy to personalize. There's a good reason it's on Firefox's Recommended list.

New updated version is, to put it politely, abysmal. The controls that are now lined up within the video frame is a bad idea (video sizes differ from clip to clip, also depending on browser window size. There's not enough space there to cram it with buttons and still allow space for youtube's own progress in minutes display. So it's never possible to always display enough amount of Enhancer control buttons. The old system was superior because every button you wanted was there on demand regardless of the size of vid, without the buttons clumsily overlapping on each other. Also another problem with the current location of controls is that adblockers may block the in-frame Enhancer buttons (this obviously depends on which adblock setting one has). But the point is: the old separate button panel never ever got adblocked out of view, because it wasn't part of the video frame (where adblocking software focuses on). Old button arrangement should have been made optional.

Super!

The recent update was awful, too much buttons screen, you don't care about UX, do you? it's really on my nerve
those buttons are not that useful, make a option so we can disable it or I have to use something else
OR is there any option to use older version ?

This last update hides the volume bar in all but fullscreen mode in favour of some buttons I'm certain are ignored by the majority of users.

The length of the video and length remaining is also blocked by these new unnecessary buttons.

I'll be turning it off I guess. I can't remember benefits it came with so they're not important. I'll take easy access to the volume slider and ability to see the length at a glance over whatever features I seem to never use since I can't even remember what they were.

Disappointing update .. roll it back please ..

Das neue Update ist ja nett ABER jedesmal wenn ich Firefox Starte aktiviert das Addon jetzt auto play. Bitte ausmachen und fixen. Danke

Disappointing update

Been absolutely smashing it with this recent update! This extension in general is a severe improvement of my youtube experience. I could probably not live without this extension anymore. Just donated as well!

While I do like that the buttons now match the player's buttons in this new update, it feels like an extreme case of feature creep. Too many buttons on the player makes it feel overwhelming, and it keeps switching on autoplay whenever I try to turn it off.

I've been using this for a looong time and I really love this a lot. When i listen to music my volume is low but with this i can force it to be louder and its helpful. With the new looks and customization, I feel like I have even more control. My favorite look is the Ubuntu Purple and the others are very well done too, lot's of options to choose from and given the option to make our own theme is awesomeee. Great Job!
Edit: I just noticed the video filters, I love the idea of it a lot because that could help out a lot of people with vision problems and so on.- thanksss

I prefer the original look.

Love the new update, can pick the good part of the song to listen to without all of the rest.

Sometimes the speed boost button does not respond and some new buttons overlay the old ones mainly in 4: 3 videos

Please change it back to the old format, this version works sometimes, and other times it doesn't.

Everything works, but it won't load when I start Firefox. I have to go into Add-ons manager and toggle it off then back on for it to work. Very annoying and will have to look for an alternative add-on and uninstall this if it isn't fixed. What's the point of the Add-on if it won't work!