As of November 16th, 2012, Google no longer allows users to customize the background image for the Google homepage. This little extension attempts to re-enable the feature for Opera users.
Quickly install the extension and open the preferences page. Find your favorite wallpaper image or your background pattern image and paste the URL. You can preview immediately and you can configure additional preferences as well.
Known issues: Requires an image from a URL starting with https://
- This extension can access your data on all websites.