Ask HN: Is Firefox Focus Relevant on Android?

For those who don't know Firefox Focus, it's a dedicated privacy browser with tracking protection and content blocking. Available on iOS and Android. However, the app seems to use the Android WebView to browse the web, and block toxic domains. Is it possible for Google to extract data from the WebView use? If so, it makes Firefox Focus kind of pointless regarding Google tracking, right? If you have any good practices on respecting privacy on Android, please share. I'm happy to hear! Thanks! PS: I might have done wrong assomptions, please tell I will edit the question. Thanks :)