How to avoid reconnecting an already paired device via WebBluetooth on every page reload.

now I closed window, removed and reconnected the dongle (=power cycled it, cannot do it with the watch), reopened https://googlechrome.github.io/samples/w­eb-bluetooth/watch-advertisements-and-co­nnect.html page, clicked request device but cancelled dialog, then clicked connect and it connected to both of them

Requesting any Bluetooth device...
Argh! NotFoundError: User cancelled the requestDevice() chooser.
Getting existing permitted Bluetooth devices...
> Got 2 Bluetooth devices.
Watching advertisements from "Magic3 1f60"...
Watching advertisements from "DK08"...
> Received advertisement from "DK08"...
Connecting to GATT Server from "DK08"...
> Bluetooth device "DK08 connected.
> Received advertisement from "Magic3 1f60"...
Connecting to GATT Server from "Magic3 1f60"...
> Bluetooth device "Magic3 1f60 connected.

so now I have opposite problem, don't have easy way to clear the list of remembered devices :-)