3.0.0.8 doesn't work any longer.
On Linux (Firefox 102.10.0esr 64 bit on Debian 12 and Firefox 112.0.1 64 bit Snap on Ubuntu 22.04) there's no longer any effect visible. Both Firefox behave as if "Return YouTube Dislike" isn't active at all. The only "function" available are the settings, which can be changed - but with no effect.
You replied to another user ("3.0.0.9 is still in review by Mozilla, give it some time untill you see that 3.0.0.9 is available in addons store - it fixes all the issues").. . so I simply will wait. As mentioned: For 3.0.0.9 I'll rate it again.

I hate YouTube. Looks like they shut down the extension. It was very useful though. Hope it comes back soon.

This was the best extension ever!

Too bad that it seems will no longer work because YouTube hide the dislike info in their core API.

Now we will never know if a tutorial is good or bad. Time to stop trusting YouTube.

It worked perfectly fine for a long time but for the past few days it's been broken on Firefox. Please fix soon. <3

Like some others have said, it's currently not working on Firefox. I'm still giving it 5 stars because it worked perfectly beforehand, and I hope the developers will fix it on Firefox.

I downloaded this extension as soon as YouTube removed the dislike button, it has been fantastic and has risen from every attack that Google has thrown at it. However, today 9th May 2023 it appears Google has once again attacked, nonetheless this is still a 5 star extension, it has been incredibly reliable since developed and I'm sure it will rise again.

Macht Dislikes wieder sichtbar. Und trackt wie ein Weltmeister. Die erhobenen Daten machen das Ding schon etwas dubios. Bin ja froh, dass es Alternativen gibt, die sich auf das Wesentliche konzentrieren und nicht noch Google spielen.

It's no longer working in Firefox (5/9/2023). It is working in Edge though.

This add on is great, However Google decided to BLOCK our ability to voice our opinions and attacked this add-on...Again...Hopefully the creator of this can find another work around.

Now on April 9, 2023 it is no longer working!

It is obviously a 5-star extension that should be unnecessary. It is not working in Firefox right now, but it appears to be a Firefox specific issue, since I have another computer that I never update (not Windows or any other software) and it works on that machine, so it must have something to do with Firefox. If I can still see the dislikes even after refreshing YouTube or opening a new tab/window, the dislikes must still be available and we should wait for an update from the dev of this extension.

awesome

Extension has always been excellent, and the developer has worked very quickly today to issue a new update to correct for YouTube continuing to break its own UI. Important to remember we wouldn't even need this extension if YouTube hadn't removed dislike counts in the first place - no need for people to take their frustration out on this developer with 1-star reviews.

No longer working as of 5/9/2023.

Dont work