Hi I should be able go help with that. From the Android home screen, open the Settings app (typically a cogwheel icon). Open Applications and look for Chrome. Select Disable This will disable Chrome on you Android device. When you next wish to use or link to a web browser, you should be asked for confirmation that you wish to use Firefox for Android going forwards. I hope this helps, but if not, please come back here and we can look into a different solution for you.