Affected versions

• 82.0a1 (20200913213803)

Affected platforms

• macOS 10.15.6
• Windows 10x64

Steps to reproduce

1. Open Firefox and enable webgl.out-of-process.
2. Go to https://obersprengmeister.frozenfractal.com/.

Expected result

• Page is loaded as expected.

Actual result

• Browser is unresponsive and the game has a long loading time.

Regression range

• I will search for one ASAP if there is one.

Notes

• Attached a screen recording.
• This happens with WebRender on/off.
• The game is loaded fine with webgl.out-of-process pref on false.

Suggested Severity: S3

I tried searching for a regression here but with no luck because:

• on Nightly 80.0a1 (20200720214226) with webgl.out-of-process on true the tab crashes when loading the page;
• on Nightly 81.0a1 (20200730215452/20200805214454) Firefox freeze for a short time and a WebGL context lost, please reload the page error message is presented when visiting the link above and retrying;
• on Nightly 81.0a1 (20200808213325) I see the same behavior as described in the description.

So I think it's safe to assume that this issue is not a regression. Removing the flags accordingly.

I think this was fixed, maybe as part of the minimal texture upload optimizations.