As a CSS designer, I’m really enjoying the ‘customisablity’ of Firefox with a language that I understand. I can’t program, but I can do CSS, which it uses to define the look of its interface.
Here’s another little mod for OS X* Firefox users. It emulates an aqua version of Safari’s upside down tabs. I personally love this style, and prefer the more compact size of them compared to Firefox’s default tabs (which are designed to emulate the window title bar).
All you need to is quit Firefox, download these files, and pop them into your Firefox profile’s chrome folder. (*Please note, this is designed to use the default pinstripe theme as its basis - it won’t work on windows - sorry!). If you’ve already made changes to your userChrome.css file, you’ll need to add the enclosed css rules in your file. Please let me know if you have any problems using this mod (there have been some issues for people using the Sage mods posted earlier).
Thanks to Kevin Gerich, who helped me solve the last hurdle in creating these - changing the text size. I’d never used the CSS property font: icon, before.