Steps to reproduce: Navigate to: https://www.khronos.org/registry/webgl/conformance-suites/1.0.2/conformance/more/functions/texImage2DBadArgs.html Results: FAIL testTexImage2D FAIL: bad internal format/format (in assertGLError: expected: INVALID_ENUM actual: INVALID_VALUE) (function (){ gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0,0,0,gl.RGBA,gl.UNSIGNED_BYTE, null); }) FAIL: bad format (in assertGLError: expected: INVALID_ENUM actual: INVALID_OPERATION) (function (){ gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1,1,0,gl.FLOAT,gl.UNSIGNED_BYTE, null); }) Chrome passes all the tests. Firefox 43.0.1 passes, but now fails with nightly in both Windows and Linux.

Looks like this was fixed upstream. https://www.khronos.org/registry/webgl/sdk/tests/conformance/more/functions/texImage2DBadArgs.html?webglVersion=1&quiet=0 PASS testTexImage2D PASS: zero size (in assertOk) (function (){ gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0,0,0,gl.RGBA,gl.UNSIGNED_BYTE, null); }) possibility by: https://github.com/KhronosGroup/WebGL/commit/2e758d2fd138855bdc787f842f3615aeeec328b5