change facebook wall font size to something larger.

facebookFontSize

/* change Facebook wall font size
/* copy this into the javaConsole in your browser with facebook open 
   and press enter                                                   */

/* in Chrome this is opened by View | Developer | JavaScript Console
   choose 'Console' (furthest right tab) and paste all of this in    */
/* in Safari this is a bit trickier, you need to enable hidden debug
   menu, in Terminal enter: 
   defaults write com.apple.Safari IncludeDebugMenu 1
   Then restart Safari, open with Develop | Start Debugging JavaScript
   choose 'Console' (furthest right tab) and paste all of this in    */
/* in Firefox, i dunno.
*/

var fontSize = 13; /* change the font size here */
tags = document.getElementsByTagName('*');
for (var i = 0, j = tags.length; i < j; i++) { 
	if (tags[i].className == 'messageBody' ) { 
		tags[i].style.fontSize = fontSize + 'px';
	} 
}