[titel]

They already have most of your browsing history simply by having you logged into your Gmail and browsing the sites having Google Analytics installed (which is most of the sites on the internet these days).

[0x0]

Some of us don't use the gmail web interface (opting for IMAP or a different provider instead), and use an ad blocker to take of analytics.

[emondi]

I do the same but sometimes I get email from google telling that I should disable access to those unsafe apps.