I'm using several different google user accounts for different services. This feels safer, and allow easier separation of work and personal stuff.
About search engine replacement: DuckDuckGo is nice, but unfortunately works only in a strict english-speaking setup. For any search in a non-english languages, its performance lacks dramatically compared to google.
Then again my main issue with Google search is that it forces me into a search specific to my country (Germany). I know, I know, if I would just accept their cookie, I would be able top change that. Without the cookie, not much luck.
I think it also requires the cookie. Also, to be honest I was too stupid to get that configured in the Firefox search bar so far (couldn't figure out how to do it I mean).
About search engine replacement: DuckDuckGo is nice, but unfortunately works only in a strict english-speaking setup. For any search in a non-english languages, its performance lacks dramatically compared to google.