I agree with you but not 100% because if we do not have any competition in web-browser industry then we won´t get any good features in the future.
I have confidence in Google for their record of great, secure products and vigilant technicians and monitors. I will put this one on the history of Google, because sometimes it’s best to simply trust. There is never enough of something, never. I am a bit concerned about it being open-source, but the main engine is powered by webkit which is open-source itself, and very secure. It’s not essentially built from scratch, and the webkit open-source is pretty much secure, and wasn’t built yesterday.