hello everyone, you may have seen that the developer of this add-on no longer maintains it, and it has stopped working. I forked it from his original source and made it work again. You can find that here: https://addons.mozilla.org/en-CA/firefox/addon/re-freshview-for-youtube/

thank you to Mikhail Andrenkov for his work!

Used to work great and still does for my home feed but it's now blocking videos I've seen when I go to a channel's "Videos" page. There is no option to disable this. If I'm specifically going to a channel's videos page to find a video I've seen, it doesn't make much sense to block it unless I request it.