I've been using this extension for months now, and I absolutely love it! The backgrounds images fit perfectly and look amazing! The extension is simple, light, and easy to customize.

Here are some my suggestions to help improve and add more customizabilty to the extension:
1. Allow individual customization of font and color for date, time, weather, etc.
2. Add more color options, such as gradient to text
3. Add a button (like one that says "I'm Feeling Lucky") that when clicked, chooses and applies a random color or font
4. Implement cloud backup for settings applied so that it can be used with Firefox sync
5. Add search box widget auto-focus support for the "Ctrl + E" keyboard shortcut
6. Add support for longer text in search widget

Oh, and you should probably fix the typo for "erase" in the Result to Default popup :p