[adsche]

Re 3.: I think that's a terrible promtp. The prompt says, my settings might be outdated and I should switch back to Google as a search engine. What's the reasoning here? Why is implied that the settings are outdated if I use a custom search engine? No other settings are checked/affected by this prompt, so why frame it as a settings issue at all?

Re 4.: Why silently, why not a prompt here?

[NiceGuy_Ty]

Using an HTTP based search engine should be explicitly opt-in, imo. Moving it to https by default seems like the right choice for non-technical users.