I’m the developer or SponsorBlock, an add-on for skipping integrated sponsorships, intros, outros and other unwanted sections of YouTube videos. It is a crowdsourced add-on, and relies on submissions on each individual YouTube video. Because of this, it fetches data from the server asking what submissions exist for a video, and uses that to skip parts of it. But privacy is integral, and we take many steps to make that the case. The add-on does not send what video you are watching to the server,...
you can keep the old version, or you can check “disable vote submission” in settings. (counting your like\dislike votes is the evil “personal data transfer” that I do.
But it’s optional.
I was curious what that was:
https://addons.mozilla.org/en-US/firefox/addon/return-youtube-dislikes/reviews/2746239