Hide Link Dotted Borders in Firefox

You may have noticed that links in firefox have a light dotted border around them.  It was intended for accessibility, so that you'd know which link you're currently focused on.  Try tabbing through a webpage and you'll see its use.

Anyway, sometimes the border is annoying, ugly, and useless.  In such cases, you can remove the border by using this piece of CSS:

outline-style:none;