Note this advice is true for email services as well. Pay for and use an alternative now, or later you won't get the choice.
Google is hellbent on locking people into their ecosystem. One such move is the promotion of AMP: https://techcrunch.com/2018/02/13/amp-for-email-is-a-terribl...
Speaking of email and browsers, the Gmail app on top of iOS presents the user with a choice between two browsers:
1. Safari
2. Chrome, which on iOS is a reskinned Safari, but with Sync and controlled by Google obviously
But when Safari is selected they actually open links in an app Web View. Which does not share sessions and cookies with Safari. And their reskinned Chrome doesn't do Safari's content blocking either. Firefox on iOS doesn't do that either, but at least Firefox has its own tracking protection.
Speaking of Chrome on iOS, they give the user the choice to switch search engines, supposedly, however they only list Yahoo and Bing as alternatives. No DuckDuckGo or Qwant or the ability to add your own.
Android still allows users to switch their web browser or to use an alternative app store, but I wonder for how long. I mean they disallow users to uninstall their apps. My guess is that they are afraid of locking Android down more due to fines from the EU.
Sadly what made Google great several years back was openness. But times are changing.