Searxng! You can self-host it, but I just use a public instance, there are tons you can find out there. You can also install a firefox extension¹ to be able to use it directly as your default search engine :)

¹ you don’t need to download an extension, you can just go to a site, right click on the address bar and add it to firefox/librewolf as a custom search engine, as per these instructions.