GLFW created MSAA enabled frame buffer by default.

I need an ability to initiate default FBO (screen) with no multisampled render target. I need it because I have my own offscreen FBO which is MSAA and I resolve it into the screen FBO.but the blitting operation fails apparantely because of that. [Here is ](https://stackoverflow.com/questions/47934444/webgl-framebuffer-multisampling)related issue discussed on SO

I need basically to do this:

`canvas.getContext("webgl2", {antialias: false});`

The error I am getting in webgl when blitting is:

**GL_INVALID_OPERATION: Attempt to blit from a multisampled framebuffer and the bounds or format of the color buffer don't match with the draw framebuffer.**

How do I do it with GLFW in the backend?