Again, like much of the discussion around Firefox, feature vs bug is in the eye of the beholder. I think the UX of deep links on Firefox is vastly preferable. I hate when a website opens the play store and forceably tells you to install an app. I'm in a browser because I want a web interface. If I want to open your app, I will click the menu button and hit open in app. But that is reserved for very very few trusted apps.

The browser is a sandbox that I use specifically to protect me from this kind of predatory shit.