I discovered that Google Play does NOT launch when you click a link and open a tab directly.It simply launches when you click the URL bar or try to create another tab (which happens by default when you open the app without having clicked a link).
For me, it started yesterday when Firefox Nightly needed an update. I updated it, and it hasn't stopped opening every time I open the app since then.Maybe it's not checking correctly if I already updated. Maybe it doesn't happen to you because you di...