WebGL, Firefox and Ubuntu 12.04

WebGL is rather cool (as is Ubuntu 12.04 and Firefox). Recently I followed the instructions at http://www.ubuntugeek.com/howto-enable-webgl-on-firefox-4.html, only to find that
/usr/lib/libOSMesa.so.6
does not exist on my KUbuntu box after I sudo apt-get install libosmesa6.

In an attempt to try to find libOSMesa, I decided to install the release deb from https://launchpad.net/ubuntu/precise/i386/libosmesa6/8.0.3+8.0.2-0ubuntu3.2. This puts libOSMesa at
/usr/lib/i386-linux-gnu/libOSMesa.so.6

{lang: 'en-GB'}

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