We recently shared how we are approaching AI in Firefox — with user choice and openness as our guiding principles. That’s because we believe AI should be built like the internet — open, accessible, and driven by choice — so that users and the developers helping to build it can use it as they wish, help shape it and truly benefit from it.
In Librewolf there is no AI ^^
At least not out-of-the-box. Dunno if you can dig it up via about:config. Not via normal Settings I think.