While the features this addon provides are great, I am unable to use any of them because every time I attempt to install this extension, my computer becomes unusably laggy regardless of whether youtube is active or not. My computer gets so laggy that youtube videos are no longer able to play. Am not sure if this is an issue on my end or on the developer's end but this extension is completely unusable for me.

このプラグインは現在正常に動作していません。
インストールするとジャンル(タグ)別検索が使用不能になります。
しかもプラグインを無効にしても改善されずプラグイン自体をアンインストールする必要があります。

Worked well until it started crashing both my Zen browser and my wife's Waterfox with memory exhaustion.

Does not shuffle playlists on Firefox mobile. This is the only extension I could find that claimed to do this, but I was very dissapointed when the option was enabled and the playlist continued in order.

Works fine for the most part, but completely removes the recorded live chat for ALL videos with no options to turn it back on.

Pretty outdated by 2026 (eg, Shorts still visible despite trying to hide them, Join buttons hide Improve YouTube options, generally pretty bloated with redundant optionality better covered by other apps or by YT updates enabling such options, etc.)

EDIT: Everything I just said is relevant, fym. Moved from 2 stars to 1 for the canned reply. Less responding, more improving.

Great to begin with, but if you start going through your subscriptions it will bog down and break. And it turns out that the developer doesn't understand that not everyone who installs the extension is not their personal bug report.

Add on makes youtube unusably laggy.

And yes developer this is what reviews are for. They're for leaving information for others about the experience of using the app. "Makes the website it's for unusably slow" is useful information for other users. This isn't a technical or bug support request. It's a review of the functionality of the app.

Too bad, the options are very relevant, but this extension makes YT unusable: depending on the chosen options, the YT window freezes. Calculation, settings, or others, we don't know what's happening. I don't quite understand the number of positive reviews, as I don't have such an exotic setup (FF 146.0.1 + YT Anti-Translate + Privacy Badger + Ublock Origin + Emoji CheatSet on W11x64).

The performance is very bad and the developer doesn't seem to be willing to fix it. Furthermore some features are missing and the ones that do exist don't work reliable, probably because of the very bad performance.

This extension doesn’t perform as advertised! I’m not sure what people like about it or why it receives high reviews, but it fails to fulfill the primary purpose for which I downloaded it. I wanted it to remove “Shorts” from my search results and home page. While it does partially remove them from my home page, it does nothing to improve my search results. Regardless of which toggles I activate, every search is completely filled with “Shorts,” rendering this extension useless for my needs.

very high cpu usage now. wasnt a problem until a few days ago.

The extension offers a lot of useful features, but it severely affected my Firefox performance immediately after installation. The browser became noticeably slower, and C.P.U. usage spiked by ~35%. From what I’ve seen in other reviews, the developer tends to dismiss, and deny these performance issues rather than investigating, or assisting affected users; replying with responses in denial, instead of looking into the issue. Unfortunately, due to these problems and the lack of constructive support, I cannot recommend this extension.

It's works fine on PC but not on mobile. Blacklist does not work at all and even freezes the browser.

This addon claims there are filter rules. There are no filter rules that I could see. Searching the menu for "filter" reveals nothing. At best, you can "block" channels and videos, a feature youtube already has.

Also, installing this caused all of my firefox tabs on youtube to stop responding, forcing me to close and reopen each.

It's weird to me how strongly they are marketing this addon, too, and the uninstall page vaguely tries to guilt trip you for removing the plugin. I realize this is recommended by mozilla, but it's tripping a lot of sus metrics for me, and I can't recommend it.

Edit: Further review of the developer's responses on low scoring reviews make me even more certain this isn't a good idea. 1) The developers respond to claims the plugin slows users' browser down with "nuh uh no it doesn't" and "yeah well why don't you measure the milliseconds with dev tools?", and 2) The devs claim that voting less than 5 stars is "voting against the project". Why does that matter? Why does your score on your open source, free project matter? It's almost like you're pushing for popularity on your plugin for some other reason. It's incredibly suspicious, and that type of language is couched in incredibly manipulative undertones. *Don't install this.* This thing is full of red flags.

cool addon but how do I block certain channel? I don't see any button to do that.

Can't make it block shorts or playables, which is all I want the extension to do. I have every option enabled to block shorts and they still appear on YouTube mobile in my browser. What am I doing wrong?

The main reason I wanted this extension was to make YouTube stop spamming already watched videos, random playlists and useless shorts.
1) It doesn't block already watched videos, it just makes them less visible by hiding the thumbnail and dimming their links;
2) Sometimes it marks random videos as watched, but I never even clicked their links, even less watched them;
3) It cannot block playlists, as far as I've used it;
4) It blocks shorts successfully AND entirely (not just dim their links), which is good.

Update 23/Feb/2026: It's worse now. The button to hide videos won't even show up. I enabled it, restarted Firefox, and still not there.

On Android versions Firefox The extension does not work