WebGL error

I'm loading data from a private server and keep getting the following message on the browser console

Error: WebGL: A texture is going to be rendered as if it were black, as per the OpenGL ES 2.0.24 spec section 3.8.2, because it is a cube map texture, with a minification filter requiring a mipmap, and is not mipmap cube complete (as defined in section 3.7.10)

I researched this and believe it is a bug with Firefox, however, I was wondering if it would in any way affect performance?

Thanks,
  Tony

You are correct in that it is a Firefox bug, Patrick actually submitted this issue almost 2 years ago, but there’s been no movement. It shouldn’t affect performance.