For whatever reason, designers have decided for the masses that tiny fixed text is a good idea for content. Well, it's not. I have 20/20 vision, and often struggle to read text on web pages. What good does it do to have a 20+ inch monitor when you need a magnifying glass to read the text? That's right, none at all.
Annoyed with the lack of user defined controls for the zoom capabilities of Firefox, I did a quick search for add-ons to see what answers were out there. I came across an extremely useful little add-on called NoSquint. NoSquint allows global, and per page zoom levels. And as the title of the add-on would suggest: No more squinting to read text!