OpenGLES extensions

We have chipped few Mplus5121 boards with MBX PowerVR lite.
The provided libraries was announced as in development stage, i don’t know if by this answer IT sales just wanted to say that some functionalities aren’t enough stable  for production purposes or some new features/extensions will be implemented in the feature.
I would like to know if the OpenGL ES extension list was frozen, i dont know if the extension bellow are/ will be supported :
FragmentProgram FramebufferObject GenerateMipmap MirroredRepeat PackedDepthStencil PixelBufferObject
SampleBuffers StencilTwoSide StencilWrap TextureRectangle

Thanks for the clarification.