STL viewer has checkerboard background

[auscompgeek]

The 3D CAD .stl viewer gets a checkerboard background with the same white hover effect for transparent images. There's no reason for them to be, and it is very distracting.

• Browser: Firefox 87
• Operating System: Arch Linux
• Link to page with the issue: https://github.com/im-tomu/tomu-hardware/blob/master/case/tomu_0.4_case.stl
• Screenshot:
  

[the-j0k3r]

Opinionated stuff like this should always be optional. I have it optional on my GitHub style.

Not that it matters its broken now in GitHub dark so you shouldn't have this issue anymore.