They open sourced Gear VR. The are a stark contrast to other players in terms of how they have built everything on open standards (OpenXR, WebXR, etc), and they have just opened their platform by allowing third parties to build and customise it to make their own commercial offerings. Not open source, but a quite a contrast to every other player in that industry so far.
Nope. Not one bit. Supporting F/OSS when it suits you in one area and then being totally dismissive of it in every other area should not be lauded. How about open sourcing some of FB's VR efforts?