Blizzard Entertainment's Battle.net app just launched passkey support for logging in.
Contrary to classic login, for this feature it will spawn a browser and await the authentication.
When using Hurl - on clicking the "Use passkey" button - the Hurl window opens and closes almost immediately with no time to click anything.
I tried adding a custom rule for account.battle.net but this will be ignored.
The only way that works is creating a shortcut to some random website on the desktop, double-clicking it, and then select the "Timed" option in the little settings menu to choose a default browser automatically for 5 minutes.