"Optional data collection, according to the developer:

Authentication information
Browsing activity
Personally identifying information
Website activity
Website content"

Apparently not "optional" anymore, as I can't use the extension without showing my browsing activity, etc. I have uninstalled this extension until this privacy concern is corrected

EDIT: If is the case that it's a FF enforced label, then the developer should update the description of their extension, because it currently leads the users into believing these are optional permissions, when they are not

Arguing with users as a dev is just embarrassing. Doesn't matter if they are ignorant in their assumptions; the new permissions request was always there you are just now being forced to make your data handling more transparent. Doesn't help the explanation of the new preferences reads like it was written by a 2nd grader.
Needless to say, this extension doesn't ACTUALLY take any meaningful "personal information", though it *could* be used to track every video a user watches to build a profile on a user.
You can say you won't, but things change and bad actors have accessed much more critical information before. 3 stars because I haven't witnessed something as sad as those review replies in quite some time.

The sections of the app's privacy policy that matter to the new permissions:

"On registration, the extension generates a persistent random installation identifier and sends it to the Return
YouTube Dislike API. The identifier is not derived from or linked to a YouTube or Google account, but it is a
persistent identifier and is treated as personal data."

Persistent identifiers can be used to fingerprint users which is likely why it is being treated as personal data here. I am not accusing the author of this, I am just stating that, in the wrong hands, it can be used to fingerprint users.

"When the user submits a Like, Dislike, or vote removal and vote submission is enabled, the extension sends the random installation identifier, video ID, and selected action.
API requests necessarily expose the network IP address and request time. The service uses this information for
security, abuse prevention, aggregate analytics, and operation of the API."

There is more being collected than a random ID and youtube data. Nowhere in the Privacy Policy does it state if this data is being transmitted securely and while it does state that it uses the browser extension to store data and that the data is "processed by the Return YouTube Dislike service and its hosting and
network infrastructure providers" it does not state if, how and how long it is stored on its hosting and
network infrastructure provider. Nor does it state what is stored and if the data is destroyed at any point.

This matters because this information is important to allow users to make an informed choice about installing the app. Those who reside in countries that are governed by the GDPR have a right to request their data. Does the author provide the means to abide by this right? and if so, how may they do this?

"Data is not sold or shared for advertising."

This is good but "Data is not sold or shared in any way" in regards to collected data not associated with Patron or Github would be a better privacy outcome. If you do share data with third parties, please disclose this as users are becoming more and more concerned about privacy and would like to make an informed choice about installing this app.

I have no interest in entertaining any accusations made against the author in regards to the Ukraine/Russian war as the accusations I have seen contain no proof. However, I did see one review stating that the author was "Segregating users" and the author's reply did not deny this, stating "Helping Ukraine defend itself against an aggressor is not “segregation". This is concerning. An IP address can be used to identify a person's origin. I would be interested in knowing how this fits under security and abuse protection?

For the record, I support Ukraine in it's efforts to protect its land and people, and my country both supports and supplies Ukraine in its efforts. I'm not meaning any harm in this review, I am just concerned about privacy.

(One edit was made to correctly quote a statement made by the author.)

I still use old version for now, so far work just fine with some kink. Pretty sure dev are tired to death to remind over and over but people can't help to be skeptical and so do I. Just promise that those data just for function or whatever. It would be ashamed if someone found out you secretly selling data.

Edit: need to clarify "Helping Ukraine defend itself against an aggressor is not “segregation.”" does that mean you know user's nationality? by how exactly? surely not IP address.

I don't know what you going to do with those data and since i live in a country that does support russia, then i just can go fuck myself put me on your blacklist. UNINSTALL

I can safely say this extension isn't harvesting my data (the developer isn't being insidious in what they're saying, it really is free to check the Github), but this extension isn't really what I downloaded it for anymore.

Opening Youtube to see the new interface that- while I confidently believe is entirely human made- just reads like generic vibe-coded design was offputting. The new window isn't needed and serves as yet another case of "fixing what isn't broken".

The plugin's behavior wasn't consistent anyway, with the like to dislike ratio being dramatically different from what it actually was supposed to be. I reckon one's better off without a plugin like this anyway. When they DO work, it's "kinda sorta".

It still does what it says on the box, even if not perfect, but I think you're better off without from the get.

I DON'T KNOW WHAT'S GOING ON WHEN I WAS NOTIFIED BY YOUTUBE THAT IT WANTED PERSONAL INFO, BUT I WISH THEY'D LIST EXACTLY WHAT IS BEING TAKEN.

I didn't mind the Patreon advert at all (gotta pay the relevant costs somehow), but as others mentioned, the addon now requires access to a lot of sensible user data. Three stars because it does work, but the data sharing is not acceptable for me.

Работает в обычном ютубе, но не отображается иконка пальца вниз. В ютуб шортсах дизлайков по прежнему нет

It worked up till about a month ago. Now, the dislike button is broken. You can't see if you've disliked a video or not, and there's no number or thumbs down count.

why hasn't this been updated for firefox in 2 years? WTF?

doesn't work well anymore in 2026, pending the approval of an update

Thumb down disappeared.

It has worked great so far, but since a few days ago, the like-dislike ratio bar isnt displayed anymore and the dislike button beneath Youtube videos cannot be pressed anymore. Ergo i cant dislike videos unless i uninstall this addon.

After yesterday it doesnt work anymore... it shows the dislikes, dont show the thumbs down symbol.... also it dont show (bold black) if i downvote or upvote. if this problem is fixed, you get again 5 stars and a donation

it has a tendency to slowdown the browser from time to time.

На шкале лайков/дизлайков перестала отображаться серая часть с дизлайками. В настройках функция "Раскрасьте кнопки" тоже не работает. Версия Firefox - 115.33.0esr (64-битная).

No Longer Works, Aug. 14th 2025. No Icon, All Values are Set to 0 Dislikes??? That could be YouTube doing that, but IDK?

Slows down the entire site during use. It's useful to know when a crappy video is not worth watching, but man, I can't deal with the slowness.

Return YouTube Dislike is triggering YouTube adblocker detection. It was working fine until recently but now I have to disable the app otherwise I'm blocked from watching videos.