Problem is that many people use saving of passwords in browser with their mobile devices because it's more convenient.
I did that too in the past, but I understand what the risks are. I have no problem entrusting my browser for the bitcointalk account password although this is not a practice that can really be recommended to anyone who is very concerned about their privacy. But now I no longer save it.
I heard android phones are secretly reporting to google all the time what you are doing, if you are walking, seating, riding a bicycle, running, or standing...
Google can monitor user activity even for something you didn't think about before. They can find out how many thousand steps you took today, your heart rate or maybe many things. This is a common problem now when users allow the service to record everything.
They collect much more things and I don't understand why would they need to know that without asking a question about it.
When users agree to the terms of service from google then they will be safe to do so, but many users don't want to read them
[included me], this is the easiest mistake we have made with google so far which may be bad for privacy.