Windows still doesn’t like competition in its own platform

Currently on Windows 10 I’m not able to set Firefox as the default browser. This falls into a clever category of “useful bugs” so trivial that it’ll never be fixed. Hey, if the competitor’s product doesn’t register properly in our system, whose fault is that?

Screenshot of "Choose an app" feature in Windows 10
Mozilla Firefox, nowhere to be found in the selection criteria, despite being installed.