iOS
Google Chrome:Chrome:
Firefox:
First, navigate to Settings
Scroll down to Privacy and select Location Services
Select Location to turn on location services, then Scroll down and select Firefox from the list of installed applications

From the Firefox specific Location settings, select While Using the App and Precise Location to allow Firefox to use your device location.
Safari:
First, navigate to Settings
Scroll down to Privacy and select Location Services
Select Location to turn on location services, then Scroll down and select Safari from the list of installed applications

From the Safari specific Location settings, select While Using the App and Precise Location to allow Safari to use your device location.
