User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0 Build ID: 20150224030228 Steps to reproduce: https://www.khronos.org/registry/webgl/sdk/tests/conformance/rendering/framebuffer-texture-switch.html?webglVersion=1 Actual results: conformance/textures/tex-image-and-sub-image-2d-with-video.html (97 of 98 passed) failed: getError expected: NO_ERROR. Was IN Expected results: Chrome passes all the tests. Firefox fails the test with ANGLE, but passes with the OpenGL backend.

The link in the description is incorrect. It should be https://www.khronos.org/registry/webgl/sdk/tests/conformance/textures/tex-image-and-sub-image-2d-with-video.html?webglVersion=1 And both backends fail parts of the test. OpenGL backend: conformance/textures/tex-image-and-sub-image-2d-with-video.html (49 of 98 passed) failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 0,255,0 was 0,0,0 failed: at (4, 24) expected: 255,0,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: at (4, 4) expected: 255,0,0 was 0,0,0 failed: at (4, 24) expected: 0,255,0 was 0,0,0 failed: getError expected: NO_ERROR. Was INVALID_VALUE : should be no errors

Confirmed this to fail on the following hardware: - SPARK, GIADA, MACBOOK_AIR_OSX, MACBOOK_AIR_WIN, MACBOOK_PRO_OSX, MACBOOK_PRO_WIN, MACMINI, MACPRO, NEXUS-4, NEXUS-5, NEXUS-10, SURFACE, WINDBOX, HASWELL, HPOMEN (All tested configurations, so looks like hardware independent) See https://bugzilla.mozilla.org/show_bug.cgi?id=1178601 for hardware configuration details of these systems.

Passing on Intel HD 4000 under Ubuntu 16.04 and Windows 10. 50.0a1 (2016-06-25)