"extension `GL_ARB_gpu_shader5' unsupported in vertex shader"

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when loading the app in web browser, an error message shows in console:
In Chromium:
[.WebGL-0x56087d1b8bb0]GL ERROR :GL_INVALID_ENUM : glGetIntegerv: pname was GL_MAX_SAMPLES_ANGLE

In firefox

THREE.WebGLRenderer 103 shriveling.js:2:292410
THREE.WebGLShader: gl.getShaderInfoLog() vertex 0:2(12): warning: extension `GL_ARB_gpu_shader5' unsupported in vertex shader
 
1: precision highp float;
2: precision highp int;
3: #define SHADER_NAME LineBasicMaterial
4: #define VERTEX_TEXTURES
5: #define GAMMA_FACTOR 2
6: #define MAX_BONES 0
7: #define BONE_TEXTURE
8: uniform mat4 modelMatrix;
9: uniform mat4 modelViewMatrix;
10: uniform mat4 projectionMatrix;
11: uniform mat4 viewMatrix;
12: uniform mat3 normalMatrix;
13: uniform vec3 cameraPosition;
14: attribute vec3 position;
15: attribute vec3 normal;
16: attribute vec2 uv;
17: #ifdef USE_TANGENT
18: 	attribute vec4 tangent;
19: #endif
20: #ifdef USE_COLOR
21: 	attribute vec3 color;
22: #endif
23: #ifdef USE_MORPHTARGETS
24: 	attribute vec3 morphTarget0;
25: 	attribute vec3 morphTarget1;
26: 	attribute vec3 morphTarget2;
27: 	attribute vec3 morphTarget3;
28: 	#ifdef USE_MORPHNORMALS
29: 		attribute vec3 morphNormal0;
30: 		attribute vec3 morphNormal1;
31: 		attribute vec3 morphNormal2;
32: 		attribute vec3 morphNormal3;
33: 	#else
34: 		attribute vec3 morphTarget4;
35: 		attribute vec3 morphTarget5;
36: …
shriveling.js:2:242692
THREE.WebGLShader: gl.getShaderInfoLog() fragment 0:2(12): warning: extension `GL_ARB_gpu_shader5' unsupported in fragment shader
 
1: precision highp float;
2: precision highp int;
3: #define SHADER_NAME LineBasicMaterial
4: #define GAMMA_FACTOR 2
5: uniform mat4 viewMatrix;
6: uniform vec3 cameraPosition;
7: #define TONE_MAPPING
8: #ifndef saturate
9: 	#define saturate(a) clamp( a, 0.0, 1.0 )
10: #endif
11: uniform float toneMappingExposure;
12: uniform float toneMappingWhitePoint;
13: vec3 LinearToneMapping( vec3 color ) {
14: 	return toneMappingExposure * color;
15: }
16: vec3 ReinhardToneMapping( vec3 color ) {
17: 	color *= toneMappingExposure;
18: 	return saturate( color / ( vec3( 1.0 ) + color ) );
19: }
20: #define Uncharted2Helper( x ) max( ( ( x * ( 0.15 * x + 0.10 * 0.50 ) + 0.20 * 0.02 ) / ( x * ( 0.15 * x + 0.50 ) + 0.20 * 0.30 ) ) - 0.02 / 0.30, vec3( 0.0 ) )
21: vec3 Uncharted2ToneMapping( vec3 color ) {
22: 	color *= toneMappingExposure;
23: 	return saturate( Uncharted2Helper( color ) / Uncharted2Helper( vec3( toneMappingWhitePoint ) ) );
24: }
25: vec3 OptimizedCineonToneMapping( vec3 color ) {
26…
shriveling.js:2:242692

​

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problem is non existent on my laptop with

• Ubuntu 18.04
• Chromium 73
• Firefox 66

Will check versions on my desktop next time in office!

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occurs with

• Ubuntu 16.04 LTS
• Chromium 71
• Firefox 65

Have asked my systm admin to update the browsers to check if this is the cause of the issue

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On a fresh virtualbox Ubuntu 18.04 machine:

• error with Firefox 66
• works fine with Chromium 73