@river @IntrepidVector Different question, but do you also happen to know how I could put back the search engine selection at the bottom of the URL/search bar? Before I switched to Librewolf, the Firefox 128 ESR had that (it had first the URL suggestions from your browsing history, and below that the option to search with different search engines), and the Librewolf that's based on the latest Firefox only has a drop-down menu that's a lot less intuitive to keyboard-navigate to... (Need to Shift+Tab to it and then press the down arrow before the menu appears, as opposed to just pressing the down arrow a few times...)
This is what stopping me from using a custom search engine right now, the fact that it's difficult to select a search engine for a search at all