Firefox legacy webgl 1.0 "uncaught exception: Error: Could not compile shader"

Armory Engine General
1

What’s the problem? Armory 0.6 legacy webgl 1.0, but webgl 2.0 - ok.

uncaught exception: Error: Could not compile shader:
ERROR: 0:? : '' : syntax error
3 kha.js:37992:10
    compileShader http://localhost:8040/build_test/debug/html5/kha.js:37992
    compile http://localhost:8040/build_test/debug/html5/kha.js:37924
    finishCompile http://localhost:8040/build_test/debug/html5/kha.js:10362
    loadShader http://localhost:8040/build_test/debug/html5/kha.js:10339
    getBlob http://localhost:8040/build_test/debug/html5/kha.js:1945
    onreadystatechange http://localhost:8040/build_test/debug/html5/kha.js:24694