This addon modifies a lot of things on Youtube's pages, but I only consider one of those changes a good thing. The others are odd, or even bad.

First the positive one: it allows you to view more thumbnails on the mainpage. That's great!

However, along with that singular positive thing, comes a lot of questionable ones. For example, the default settings make everything about the page layouts look older, less modern, even ugly. Why is that? And even though you can disable some of these changes, there are things that it messes up permanently. Like the latest Youtube posts. They get truncated to just a few words each, and there is no option to change that behaviour. Also, playlist thumbnails are unaffected (= remain huge) despite everything else shrinking. The layouts just become erratic and mismatched.

I would not recommend this addon. If you just want to see more video thumbnails on Youtube's main page, there are better ways to achieve that.

An extremely useful addition to the youtube experience, although I really wish you could change the video player itself with it.

I really like it, that's all

we need new update with old UI!

Not only gave me the possibility of going back to a more usable, nostalgic and overall better looking UI but surprisingly also made youtube to work better and load faster in most instances - in the process making even more evident how much of a bad job the people behind YT are doing with all the bloat "updates" and terrible design choices. Great, great add-on

Looks good, stream viewer count doesn't automatically update though

It's damn great, I wouldn't go on youtube without it!

The community posts have cyclinder boxes (not sqaure) and the icon that shows someone (or a channel) that there live is circular, 5 stars to fix ;)

I understand that the latest update requires permission to be able to export the configuration files, but I beg you, make it optional. Until then I will be forced, for safety reasons, to remove the addon. It is a shame because I really loved this extension.

edit:
Thank you for your quick response and understanding. Reverting back to 5 stars. Thanks for making YouTube usable again.

Love how it looks, however I downloaded this because I don't like the new floating video player icons, would it be possible to change them? Or at least make it so that the bottom of the icons doesn't get cut off, it does that on my machine.

The latest update requires permission to "Download files and read and modify the browser’s download history". Why does the stateless functionality offered by this extension suddenly require such a strong intrusive permission? Unless, this extension was bought over by some greedy business that wants to collect and sell your data. Just find another extension at this point.

Edit (post dev's response): It's still potentially unsafe in the event that a future update may obfuscate the code, since Mozilla does not require add-ons to be opensource. Since I do not require the export functionality, there should not be any obligation for me to accept the new permission. Currently, it is not so. Also, there are other extensions like uBlock Origin that allows syncing config (custom filter entries) without requiring any download or browsing history permissions.

I am not questioning your commitment to remain open-source, but with this permission, there is a permanent opportunity for you and your successor (if and when) to malpractice.

Thanks sooooooooo much

this makes the UI unironically friendlier than the new UI

Love it. One big problem though, some days ago (forgot when), the shuffle button in the Playlist (When watching from the playlist, next to the loop button) is just gone. Turned the extension on & off to confirm, and yes the extension itself is the problem. Turning settings on & off did not fix the issue.

Edit: This issue isn't fixed as of 8/20. Won't change rating, this is just to keep the issue known