You won't need to install anything or to hack in the console. Just a few clicks in the system settings.
Go to system - preferences - appearance - fonts. Change all the sans fonts sizes from 10 to 9 (this is not necessary but it's much nicer with it) and then, click the "Details" button, and change the Hinting options from medium to slight.
That's all! That makes the fonts in the system, Firefox and Thunderbird look much nicer! That also deals with the bug https://bugs.launchpad.net/ubuntu/+s...rd/+bug/224810
In the screenshot provided, on the left is Before, on the right is after.
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