It’s marked as ‘done’ in the roadmap but I’ve yet to find any documentation about it.
Can anyone point me in the right direction?
Please see the 4.6 Release Notes: Unreal Engine 4.6 Release Notes | Unreal Engine Documentation
I believe this Trello card is referring to the Web Browser UI Widget listed there. In recent engine versions, you can enable this in the Editor by going to Edit > Plugins > Widgets > Web Browser
Documentation: Web Browser | Unreal Engine Documentation
Cheers