It works with most websites, it syncs my bookmarks across computers, lets me reuse my existing Google account instead of needing to make a new one, and I really don’t care about my data going to Google because I already give up my data in exchange for free services (which feels like a win-win).
I do all the same with Firefox. Plus I don’t have to worry about my adblock going away anytime soon (especially in mobile). I still use the Google services for work as well. I just like the FF.