OVER THREE YEARS PEOPLE HAVE BEEN DEMANDING THIS. When I tap a link in an app, I want it to open IN FIREFOX. Not some custom tab. Not some special pseudo in-app environment. IN. FIREFOX. EVERY OTHER browser on Android can do this. Don't give me some BS answer about removing Firefox as my default browser, either. That causes it to either open in the app I'm using, or the phone's built-in browser, NEITHER OF WHICH ARE SECURE. If you really care about security, like you're trying to sell us you are, you will fix this yesterday.