[gles] firefox: WebGL warning: getSyncParameter

[Wumpf]

Description
Firefox reports WebGL warning: getSyncParameter: ClientWaitSync must return TIMEOUT_EXPIRED until control has returned to the user agent's main loop. (only warns once)

Seems to happen in the most trivial examples. Chrome in contrast is happy

Repro steps
Can be observed in Bevy's samples
https://bevyengine.org/examples/2d/sprite/

Platform
webgl, firefox

[Wumpf]

Came up here before #2573 (comment) - remained unclear if this is a firefox bug as I understand

[softmoth]

This is still an issue with Bevy 0.10. Firefox warns 32 times, and then stops reporting WebGL warnings, so this could be masking other issues as well.

[kdashg]

I will be making the warning quieter here: https://bugzilla.mozilla.org/show_bug.cgi?id=1822867

[cwfitzgerald]

Fixed upstream