Lately I noticed that whenever I'm reading an article and I want to search something I read there, as I'm typing the keyword, Chrome autofills it. For example, I was reading a reddit post and someone mentioned the game Dungeons and Dragons. I opened a new tab, and as I was typing Dunge, Chrome autocompleted the full game name. I never searched that before.
Okay that was a dumb question. But at least they are using clipboard contents. Today I tried to extract a zip file but an error occurred and then was typing in Chrome address bar "an error" Chrome autofilled it with the exact error statement and some other related suggestions. I tried to google using another browser, but there, I got completely unrelated suggestions. I'm not being a security nut but I just found out this today.