[
    {
        "identifier": "chrome-63",
        "backend": "webgl2",
        "extensions_strive": [
            "EXT_color_buffer_float",
            "EXT_disjoint_timer_query_webgl2",
            "EXT_texture_filter_anisotropic",
            "OES_texture_float_linear",
            "WEBGL_compressed_texture_s3tc",
            "WEBGL_compressed_texture_s3tc_srgb",
            "WEBGL_debug_renderer_info",
            "WEBGL_debug_shaders",
            "WEBGL_lose_context"
        ]
    },
    {
        "identifier": "edge-41",
        "backend": "webgl1",
        "extensions_strive": [
            "ANGLE_instanced_arrays",
            "EXT_frag_depth",
            "EXT_texture_filter_anisotropic",
            "OES_texture_float",
            "OES_texture_float_linear",
            "OES_standard_derivatives",
            "OES_element_index_uint",
            "OES_texture_half_float",
            "OES_texture_half_float_linear",
            "WEBGL_compressed_texture_s3tc",
            "WEBGL_debug_renderer_info",
            "WEBGL_depth_texture"
        ]
    },
    {
        "identifier": "ie-11",
        "backend": "webgl1",
        "extensions_strive": [
            "ANGLE_instanced_arrays",
            "EXT_texture_filter_anisotropic",
            "OES_texture_float",
            "OES_texture_float_linear",
            "OES_standard_derivatives",
            "OES_element_index_uint",
            "WEBGL_compressed_texture_s3tc",
            "WEBGL_debug_renderer_info"
        ]
    },
    {
        "identifier": "firefox-57",
        "backend": "webgl2",
        "extensions_strive": [
            "EXT_color_buffer_float",
            "EXT_texture_filter_anisotropic",
            "EXT_disjoint_timer_query",
            "OES_texture_float_linear",
            "WEBGL_compressed_texture_s3tc",
            "WEBGL_debug_renderer_info",
            "WEBGL_debug_shaders",
            "WEBGL_lose_context",
            "MOZ_WEBGL_lose_context",
            "MOZ_WEBGL_compressed_texture_s3tc"
        ]
    },
    {
        "identifier": "safari-10.1",
        "backend": "webgl1",
        "extensions_strive": [
            "compressed_texture_pvrtc",
            "compressed_texture_s3tc",
            "debug_renderer_info",
            "disjoint_timer_query",
            "draw_buffers",
            "element_index_uint",
            "frag_depth",
            "instanced_arrays",
            "lose_context",
            "sRGB",
            "shader_texture_lod",
            "standard_derivatives",
            "texture_filter_anisotropic",
            "texture_float",
            "texture_float_linear",
            "texture_half_float",
            "texture_half_float_linear",
            "vertex_array_object"
        ],
        "functions_undefine": [
            "readBuffer"
        ]
    },
    {
        "identifier": "no-WEBGL_draw_buffers",
        "backend": "webgl1",
        "extensions_conceal": [
            "WEBGL_draw_buffers"
        ]
    },
    {
        "identifier": "no-readBuffer",
        "extensions_hash": "100000",
        "functions_undefine": [
            "readBuffer"
        ]
    },
    {
        "identifier": "webgl1",
        "extensions_hash": "1+++++"
    },
    {
        "identifier": "webgl2",
        "extensions_hash": "2+++++"
    }
]