Incomprehensible blur on MacOSX and anti-aliasing

Question

JavaScript

Working with WebGL, there are two problems:
1. WebGL does anti-aliasing, which looks rather dull. I don't need it, I want to implement my own version, but I can't disable the built-in one. The only Googled solution is to create a context like "c = canvas.getContext("experimental-webgl", { antialias: false });" - does not work in Chrome, Opera, Firefox in Win7 and Mac OS X, or Safari in Mac OS X. Are there other options to disable built-in anti-aliasing?

2. The roots of the second problem are probably similar to the first. Running on a MacBook with a retina display, everything looks extremely dull and blurry. Heavy googling only resulted in the option of manually doubling the WebGL context viewport and canvas width/height while leaving the canvas style width/height as normal. And it rolls. But not in Safari. The picture in Safari remains blurry and incomparably more dull than in Chrome:


Does anyone have any ideas how to make Safari draw the picture like Chrome can?