Found 157 extensions:

GL_ANDROID_extension_pack_es31a
GL_EXT_base_instance
GL_EXT_blend_minmax
GL_EXT_buffer_storage
GL_EXT_color_buffer_float
GL_EXT_color_buffer_half_float
GL_EXT_copy_image
GL_EXT_debug_label
GL_EXT_discard_framebuffer
GL_EXT_disjoint_timer_query
GL_EXT_draw_buffers_indexed
GL_EXT_draw_elements_base_vertex
GL_EXT_frag_depth
GL_EXT_geometry_point_size
GL_EXT_geometry_shader
GL_EXT_gpu_shader5
GL_EXT_map_buffer_range
GL_EXT_multi_draw_indirect
GL_EXT_occlusion_query_boolean
GL_EXT_post_depth_coverage
GL_EXT_primitive_bounding_box
GL_EXT_raster_multisample
GL_EXT_render_snorm
GL_EXT_robustness
GL_EXT_sRGB
GL_EXT_sRGB_write_control
GL_EXT_separate_shader_objects
GL_EXT_shader_implicit_conversions
GL_EXT_shader_integer_mix
GL_EXT_shader_io_blocks
GL_EXT_shader_texture_lod
GL_EXT_shadow_samplers
GL_EXT_sparse_texture
GL_EXT_sparse_texture2
GL_EXT_tessellation_point_size
GL_EXT_tessellation_shader
GL_EXT_texture_border_clamp
GL_EXT_texture_buffer
GL_EXT_texture_compression_dxt1
GL_EXT_texture_compression_s3tc
GL_EXT_texture_cube_map_array
GL_EXT_texture_filter_anisotropic
GL_EXT_texture_filter_minmax
GL_EXT_texture_format_BGRA8888
GL_EXT_texture_norm16
GL_EXT_texture_rg
GL_EXT_texture_sRGB_decode
GL_EXT_texture_storage
GL_EXT_texture_view
GL_EXT_unpack_subimage
GL_KHR_blend_equation_advanced
GL_KHR_blend_equation_advanced_coherent
GL_KHR_context_flush_control
GL_KHR_debug
GL_KHR_robust_buffer_access_behavior
GL_KHR_robustness
GL_KHR_texture_compression_astc_ldr
GL_NV_EGL_stream_consumer_external
GL_NV_bgr
GL_NV_bindless_texture
GL_NV_blend_equation_advanced
GL_NV_blend_equation_advanced_coherent
GL_NV_conditional_render
GL_NV_conservative_raster
GL_NV_copy_buffer
GL_NV_copy_image
GL_NV_draw_buffers
GL_NV_draw_instanced
GL_NV_draw_texture
GL_NV_explicit_attrib_location
GL_NV_fbo_color_attachments
GL_NV_fill_rectangle
GL_NV_fragment_coverage_to_color
GL_NV_fragment_shader_interlock
GL_NV_framebuffer_blit
GL_NV_framebuffer_mixed_samples
GL_NV_framebuffer_multisample
GL_NV_generate_mipmap_sRGB
GL_NV_geometry_shader_passthrough
GL_NV_gpu_shader5
GL_NV_image_formats
GL_NV_instanced_arrays
GL_NV_internalformat_sample_query
GL_NV_non_square_matrices
GL_NV_occlusion_query_samples
GL_NV_pack_subimage
GL_NV_packed_float
GL_NV_packed_float_linear
GL_NV_path_rendering
GL_NV_path_rendering_shared_edge
GL_NV_pixel_buffer_object
GL_NV_polygon_mode
GL_NV_read_buffer
GL_NV_read_depth
GL_NV_read_depth_stencil
GL_NV_read_stencil
GL_NV_sRGB_formats
GL_NV_sample_locations
GL_NV_sample_mask_override_coverage
GL_NV_secure_context
GL_NV_shader_atomic_fp16_vector
GL_NV_shader_noperspective_interpolation
GL_NV_shadow_samplers_array
GL_NV_shadow_samplers_cube
GL_NV_texture_array
GL_NV_texture_border_clamp
GL_NV_texture_compression_latc
GL_NV_texture_compression_s3tc
GL_NV_texture_compression_s3tc_update
GL_NV_timer_query
GL_NV_viewport_array
GL_NV_viewport_array2
GL_OES_EGL_image
GL_OES_EGL_image_external
GL_OES_EGL_image_external_essl3
GL_OES_EGL_sync
GL_OES_compressed_ETC1_RGB8_texture
GL_OES_copy_image
GL_OES_depth24
GL_OES_depth32
GL_OES_depth_texture
GL_OES_depth_texture_cube_map
GL_OES_draw_buffers_indexed
GL_OES_draw_elements_base_vertex
GL_OES_element_index_uint
GL_OES_fbo_render_mipmap
GL_OES_geometry_point_size
GL_OES_geometry_shader
GL_OES_get_program_binary
GL_OES_gpu_shader5
GL_OES_mapbuffer
GL_OES_packed_depth_stencil
GL_OES_primitive_bounding_box
GL_OES_rgb8_rgba8
GL_OES_sample_shading
GL_OES_sample_variables
GL_OES_shader_image_atomic
GL_OES_shader_io_blocks
GL_OES_shader_multisample_interpolation
GL_OES_standard_derivatives
GL_OES_surfaceless_context
GL_OES_tessellation_point_size
GL_OES_tessellation_shader
GL_OES_texture_border_clamp
GL_OES_texture_buffer
GL_OES_texture_cube_map_array
GL_OES_texture_float
GL_OES_texture_float_linear
GL_OES_texture_half_float
GL_OES_texture_half_float_linear
GL_OES_texture_npot
GL_OES_texture_stencil8
GL_OES_texture_storage_multisample_2d_array
GL_OES_texture_view
GL_OES_vertex_array_object
GL_OES_vertex_half_float