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[Public WebGL] canvas resizing in firefox

To resize canvas I use the function

var canvas; ...
  canvas.resize = function (){
    var size = Math.min(window.innerWidth, window.innerHeight) - 10;
    canvas.width =  size;   canvas.height = size;
    gl.viewport(0, 0, size, size);
  } ...
<body onload="webGLStart();" onresize="canvas.resize();">

all works fine in Chrome and Opera. Unfortunately in Firefox 4b12 or rc1 (WindowsXP sp3, Radeon 4***, Catalyst 11.1) large models are damaged under resizing
http://www.ibiblio.org/e-notes/webgl/deflate/ship1.html 1.2Mb
http://www.ibiblio.org/e-notes/webgl/deflate/cathedral1.html 2.5 Mb
(grasshoper.html, beetle.html, enterprise.html are fine).
1. Is this method accurate for canvas resizing?
My old one is wrong too as since it starts many "webGLStart" examples simultaneousely
<body onload="webGLStart();" onresize="webGLStart();">
2. can I use blacklisted ATI OpenGL drivers for testing?

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