Affected versions

• Firefox 68.0 RC
• Firefox 69.0b6
• Latest Nightly 70.0a1

Affected platforms

• Aarch64 Windows 10

Steps to reproduce

1. Start Firefox
2. Visit https://www.tinkercad.com/
3. Login with an account
4. Click Create new design (3D Design)

Expected result

• Graph is shown with a cube

Actual result

• Black screen

Regression range

• This is not a recent regression, 68.0 RC is also affected. I will investigate further if this is an old regression or not.

Additional notes

• Attached is an image with the bad behavior.
• I could not reproduce this on two other identical machines.

Attached is the about:support section from the Device that's affected by this:

• Lenovo YOGA C630-1Q50
  Here are the about:support sections from the Devices that are not affected by this:
  https://drive.google.com/open?id=1D0hJGFlmvp3qqdrc97E1SLJfgZOIOdEQ (I can attach them as well here, I did not want to spam)

Bugbug thinks this bug is a regression, but please revert this change in case of error.

Hi Guys, I managed to get a regression range for this issue, here are the results:

Last known good:
pushlog_url: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=8e746f670f430ceb0cb85fa8eebfe97cbe42ff01&tochange=1312db5d495953cc6e18b16d082d06d611a21166

First known bad:
pushlog_url: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=8e746f670f430ceb0cb85fa8eebfe97cbe42ff01&tochange=ed68c008e5d8db0940a1fbc31bfc24efccba6c26

I hope this helps, I will remove the flag.

Happy to take a patch for 70, but since this is already triaged and set to P3 priority I'm setting it as fix-optional.
That will remove the bug from weekly regression triage.