URL: https://goo.gl/XDWKfX
Browser / Version: Firefox 40.0
Operating System: Android
Problem type: Something else - I'll add details below

Steps to Reproduce

1. Install Google Docs app from playstore.
2. Navigate to: https://goo.gl/XDWKfX
3. Click on edit button on top right cornor.

Expected Behavior: a popup should appear which will ask to use the app instead of browser.

Actual Behavior: On Fennec, its still showing get the app button instead of Use the app button