On the desktop, I use Ublock Origin and FB Purity.

On my phone, I use Hermit to containerize FB Mobile and that’s routed through my app and web adblocker, Adguard. I literally haven’t seen an FB ad in years with this setup. FBP also allows you to turn off pretty much every annoyance on the site(you may know, if you like this then, people who do this do…)