URL: http://web.airdroid.com
Browser / Version: Firefox 47.0
Operating System: Mac OS X 10.11
Problem type: Something else - I'll add details below

Steps to Reproduce

1. Download Airdroid app from Google play store
2. Navigate to https website mentioned on screen, i.e: https://192.168.0.100:8890/
3. Click on Files on left side and try to upload something from computer to mobile using drag & drop.

Expected Behavior:
Uploading should start as soon as drag & drop files.
Actual Behavior:
Saying Firefox is not supported drag & drop this time