UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Steps to reproduce the problem:
In the DevTools Sensors Tab under Geolocation, you can set a custom lng/lat for testing with the Geolocation API, but not any of the other Coordinates fields such as accuracy, altitude,  heading, etc. See https://developer.mozilla.org/en-US/docs/Web/API/Coordinates

What is the expected behavior?

What went wrong?
feature request

Did this work before? No 

Chrome version: 53.0.2785.143  Channel: stable
OS Version: 
Flash Version: