In a3f4cb4c we removed the possibility of going back with B/Y buttons because that was interferring with potential action assignments of those buttons inside WebXR experiences. We were exiting the WebXR experience instead of executing the action that was set by authors.
However it turns out that these buttons are heavily used by users in non-immersive sessions as they're very convenient as you don't really have to hold both controllers to have full control of your 2D navigation.
In a3f4cb4c we removed the possibility of going back with B/Y buttons because that was interferring with potential action assignments of those buttons inside WebXR experiences. We were exiting the WebXR experience instead of executing the action that was set by authors.
However it turns out that these buttons are heavily used by users in non-immersive sessions as they're very convenient as you don't really have to hold both controllers to have full control of your 2D navigation.
Fixes #1266