Install e os on fairphone 6

Error on step: device-detection

Cannot execute command connect adb
The device is not connected Failed to connect: Cannot connect ADB Failed to request USB device: Failed to execute ‘requestDevice’ on ‘USB’: No device selected.
Proposal: Check connection and that no other program is using the phone and retry.

It is possible that you have a browser that does not fully support WebUSB.

What is the exact browser and version?

Alternative