I find that I don’t mindlessly scroll on my desktop, so it’s not a panacea, but the newsfeed eradicator is useful for removing recommendation feeds from a desktop browser: https://chromewebstore.google.com/detail/news-feed-eradicato....

Also, here’s a (mostly just for fun) project I did related to this: https://github.com/andrew-noble/doomscroll-detector