I get same error on ff 105.0a1 (2022-08-01) (64-bit) running on Ubuntu 22.04 ... however I know WebGL runs fine on this setup

on same laptop using chrome Version 106.0.5249.21 (Official Build) dev (64-bit) get error

[.WebGL-0x1b80018ed800]GL ERROR :GL_INVALID_OPERATION : glDrawArrays: Source and destination textures of the draw are the same.

again this same chrome browser runs other WebGL just fine