Can pair puck in WIndows but not Chrome

Before jumping to conclusions, have the following tests been performed?

'and then hit the button in 3 seconds'

Are you able to perform a 'Hard Reset' holding the button more than the three seconds that was indicated?

http://www.espruino.com/Puck.js Under heading 'Hard Reset'

'but keep the button held for around 10 seconds'

1) Press and hold the button for ten seconds while inserting the battery.

Describe the sequence of LED output.

2) Remove the battery. Insert without pressing the button.

Describe the sequence of LED output.

'The web version doesn't even show a serial port'

Please re-read topic beneath Heading 'Once Web Bluetooth is set up' found in second link in #16 previously posted.