My Windows 10 wouldn't recognize my phone. After using
adb it now works. Here's how.
- Connect your Android phone via USB
- When it asks what to connect as, choose "Camera (PTP)"
- Open Google Chrome and the webpage you want to test
- Open Chrome Developer Tools and find the "Remote Devices" tab
Now, your phone might or might not appear in this tab.
On my OS X and Fedora, it did. On Windows I had to get Android Debug Bridge ("ADB"):