FF57 - Existing Extension focus on popup is not default

[Baptistou (Baptiste Thémine)]

How to autofocus an input field in a popup?

Hi, I would like to open a popup (https://developer.mozilla.org/en-US/Add-ons/WebExtensions/user_interface/Popups) that includes a list and an input field which could filter this list. What I can’t get to work is, that I want the user to be able to immediately type something into this input field. I want the popup to get the focus, but I seem to only get it when I click in it. Anyone has an idea how to achieve this or is it not possible?

This is a reported issue so you will have to wait until it will be fixed in next firefox updates.