For anyone there is no need to stay anonymous all the time,when we are doing some daily routine things then google or bing will be the better solution since it has better speed than anonymous search engines and also the speed will decrease a lot when we connect into proxies.
Remember the risks of connecting to proxy address when sign into exchange or gambling sites,you account is in risk of getting frozen for the multiple login from the same IP address which violates their terms and conditions.
And one more no one is completely anonymous since we had smartphone in our hand.

Well, but maybe I don't want to Google spy me all the time, so I'm not using it daily. When it comes to efficiency of web browser - it's true, most probably anonymous browsers won't be as fast as those spying ones, but there isn't a massive difference between their efficiency. Also - Google browser adjusts it's results to your previous searches, it bases on a profile of you as a user, so the results of searching will be repetitive and not as wide as in anonymous browser.