I need to change my rating and opinion on this. I still like mini player, same as flip horizontally and hide end screens. But reverse the order of a playlist is not working how I wanted it to work. In fact, it's practically not working, because I do not see any icon, nor in player or playlist and also as I now understand, it's only working with pop-up player, which is not working either.

So yeah. For mini player, flip horizontally and hide end screens, this add-on gets two stars, but the rest have no practical use for me or are not working.

In version 2.0.17 the option " Use the available space based on the viewport dimensions to expand the video player " doesn't resize the video correctly, it's taller than the viewport and the control bar is displayed off screen.
Now has ads.

All in all very good and very useful.

Edit: 04/2023
When I have this AddOn active, I constantly get the message "Video not available" from YoutTube.
"This video is restricted. Please check your Google Workspace administrator's restrictions and/or your network administrator's restrictions." And only when I deactivate it, I can watch YoutTube videos normally again!

A lot of useless features, but no Closed Captions.

What is the cost of adding one more checkbox for Closed Captions ?!!

Interesting concept ruined by unbelievably bloated execution.

Downloaded solely for the default volume option and to disable default auto-play; the latter works - the former doesn't.

In practice, videos load and begin playing too quickly - before the extension can modify (lower) the volume. Maybe it'd work better if my PC were a potato or my browser ran like crap, but for obvious reasons I'm going to skip that test and go back to using a simple script for what I need.

Has a few other features that might be interesting in very niche scenarios, if they actually work, but nothing that either your average end-user nor your function-minded power-user will care about. Get rid of all that garbage and optimize the remaining code, and maybe this'll be worth trying again.

For now... hard pass.

while the features are good half the time it does not allow me to play the videos, I keep refreshing page and pressing on the play button and its been more than 4 months. I wonder if anyone reported it or the devs are simply not updating it anymore.

Not sure when this started, but this add-on seems to prevent videos from beginning at the correct time when there's a timestamp in the YouTube link. i.e. If you go to a link that says https://www.youtube.com/watch?v=[video]&t=574s, the video will just start at the beginning instead of starting at 9:34. This problem went away as soon as I disabled this add-on.

the latest updates did nothing but detract from the add-on and worsen the experience. one made it so you have to click farther away to access the add-on's buttons, the other made it so you need another click before you can access them in the form of a triple dot icon. and finally expanding the video player does not work correctly most of the time ever since these updates rolled out. i don't know why they're doing this but this used to be my #1 extension. now i'm forced to roll back to out of date versions.

I hate the new version, is intrusive with the UI and override the youtube options/behavior. I still using this, just for the cinema mode.

last update changed everything I liked about this add-on, removing now :(

was good but I hate the new version, I really miss the tool bar

Recent update made it not worth the effort to keep enabled.
Extension settings now override youtube ones, instead of adapting them. If you turn the autoplay toggle off, it still keeps autoplaying since the extension's checkbox for autoplay doesn't update.
Having videos be auto-paused in new tabs until you click them behaviour changed, now you have to click the youtube icon in the centre of the video instead of just clicking anywhere on the video. Overrides youtube specified theme with the extension one. If it's not going to respect changes made to settings using the buttons on the youtube page, it should at least hide those buttons.

Was working absolutely fine until the update, now experiencing all sorts of problems. Like the old saying goes " if it isn't broken, fix it until it is!" Had to disable it.
Edit: Reinstalled Version 2.0.101 from here, https://addons.mozilla.org/en-GB/firefox/addon/enhancer-for-youtube/versions/ and everything appears to work as before, turned off auto updates for the time being. Will update when fixed.

скриншоты не работают
минусов у новой версии больше чем у предыдущей !!

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!

This used to be a great addon, latest update is still functional but the new interface is awful, too fussy and intrusive. Bring back the old look.
Edit - for those who prefer the old look you can rollback to the previous version
https://addons.mozilla.org/en-US/firefox/addon/enhancer-for-youtube/versions/

I don't like the new update. New buttons are way too big and cluttered. The 'boost volume' button covers up my sound bar for some reason. The speed button was turned into three separate buttons, you can still change the speed by scrolling the main one, so I don't see the point of other two. Also before the update you could scroll down and still use the toolbar but now you have to go all the way up.

The missing minibar at the bottom of the page is frustrating because all the buttons are now stacked on the youtube player making it ugly and unnecessarily full

Speed of the video can no longer be controlled. And no I did not use boost sound.

This extension has a plethora of options, but they're not well organized. (Look at the settings for any popular IDE for how it should look.) What I needed was A) an assurance that the default settings would not modify YouTube at all (or at least a summary of the default changes), and B) a quick way to discover if the specific feature I need actually exists in this plugin.

Without A), I have to read and understand *every* option before I can rely on this plugin, and without B) I don't even know if it's worth the effort or not. In summary, the new-user experience suffers from the sheer magnitude of what it can do.

I find this to be highly inconsistent. Sometimes the videos are in expanded view, sometimes in default view, sometimes in cinema view and sometimes in theater view, all without changing the settings in this extension. Makes it highly unpredictable as to what my viewing experience will be.

On top of that, the settings are very obtuse in what they actually do and how thee interact with each other. For example, I count at least three different settings for the viewport size. WHY???

Decent when it works properly but that is rare. 90% of the time it doesn't turn off annotations despite being set to and an increasingly more annoying issue is videos loading in a lower resolution forcing me to reload the page for the set resolution to take effect. The extension seemed to work much better with the legacy version of youtube. Since that's been completely scrapped now this extension is becoming more and more inconsistent. Dropped my new rating to 2 stars from the 4 I gave in the past because the issue with annotations has still not been fixed despite almost 3 years having passed.