Impact of Clagnut 'body {font-size 62.5%}' CSS Styling Method

Firefox and SeaMonkey set to 20px default; no userContent.css; no minimum font size:: Note that already just from the larger than shipped 12pt/16px browser default 20px default that the content in the center columns is below the typical 7-10 words per line length that makes for easy reading, down to about 5 words per line, while all the non-heading text content is smaller than the browser's main menu and urlbar text.
Add either 20px browser minimum font size, or userContent.css with 'html>body {font-size: medium !important}':: Note how all content text now is considerably larger than the 20px browser default, while some text has partially or wholly disappeared, and what was the tiniest text is now up to 20px in size. What normally happens with minimum size or this simple user CSS on sites that don't use such a large reduction from default in the body rule is that most main page text renders at or near the user's preferred size. Not shown in the image, farther down the page are content columns that only fit 1-2 words per line.
Substitute custom styles in userContent.css that replace all site font-size styles with medium !important:: Note that virtually all text is now the browser's default/user's preferred size, but this method of overriding author styles is complicated, and well beyond the capability of average web users to apply.