I use vanilla FF, Floorp, LibreWolf, and Mullvad in the FF family (plus Vivaldi for Chromium) - I only use vanilla FF for anything that I want to use persistent logins and containers for, so it’s like an hour a day at most. I only installed the update 36 hours ago, do other than set bookmarks, I haven’t searched anything with FF to give it the opportunity to recommend anything.

In the settings, there’s 2 boxes you can un-check about recommendations. Seems pretty easy to disable this.