How to increase or decrease the font size

in Mozilla Firefox 3 (FF3)

If you can’t read some tiny text on a website, or you mistakenly changed the browser font size, adjusting the font size is very helpful.  There are a couple ways to do it.

The easiest way to increase the font size is to hold "Ctrl" then press the + or - key.  As you may imagine, the + key increases the font size while the - key decreases it.  An alternative way to adjust the font size is to hold "Ctrl" and scroll the wheel up or down on your mouse to adjust the font size.
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