Globex Designs released a mozilla firefox plugin that redesigns and changes your gmail look easily. This plugin works with CSS (Cascading Stylesheet) files which are already installed for your browser. It simplifies the use of these styles by providing auto-updates, easy management and notification of changes.
With Firefox 3.0, you don’t need to do anything after installing the plugin, just run gmail and you’ll see a new dark look. You’ll also confront a small icon in the bottom right corner of your browser, select â€œAdd File to Stylishâ€ and then save (If it’s not working).