YouTube buttons like 'not interested', 'dislike', 'stop recommending channel', and 'remove from watch history' are ineffective at preventing similar content from being recommended and its user controls do not work for many people, researchers from Mozilla have discovered.

The team from the developer of Firefox open-source web browser heard from several people who expressed frustration with the user controls, and who said they wanted better tools that simply work the way they'd expect them to.