Hello,
I spoke to the team and unfortunately integrating custom file support is not viable with an internal OIS. It would need to be handled by an external app as the internal browser can't natively render PDFs or handle WebGL.
This is not a definitive "no" to your requests, however, I do not want to promise anything. The feedback remains logged internally and we'll see how it goes in the future.
@Prophet I'll forward your additions and see if some if it can be implemented or not. Thank you 🙂