If you're using Firefox and you want to change the font on this site to something else, it's fairly easy to do with an extension (or two) and a little CSS (if you want to do this with Safari, see this).This isn't limited to my site only—this tutorial will work on nearly any site—but a few people have complained about Arial on Windows (the site uses Gill Sans on the Mac), so I figured this might be useful.
I've assigned this site's body tag the id "maniacalrage-net" but if a site doesn't have a body id set, you can use the URL id extension, which automatically adds an ID to each and every page. Either way, once you have an ID for the body of a page, you can override its local styles by adding rules to your userContent.css file which, by default, is blank. To make this easier, use the Edit Config Files extension, which places a menu-item in the Tools menu and allows for quick access to edit that (and other) files.
After installing, look in the Tools menu and choose the Settings option from the new Edit Config Files menu.
Choose an editor to use by clicking the browse button and picking your favorite editor (or, if you don't have one, use Notepad by entering c:\windows\notepad.exe).
Open the Edit Config Files menu once more and choose the userContent.css item.
Now you can add a rule to the bottom of the page. For example:
body#maniacalrage-net {
font-family: Times !important;
}
Including !important will force userContent.css to override a site's local styles, so you'll see this site in Times (lovely!).
Save the file, close it, and then restart Firefox (you have to close ALL windows). Open Firefox back up and you should be in business. You can undo these changes by removing the rules from userContent.css and restarting Firefox.
In case you're a visual person, I've made a screencast of this tutorial for you to watch.