This is a mod for your browser so that whenever you're using scroogle, the rather ugly scroogle-favicon is replaced with the classy old Google favicon. This holds true for the adress-bar, tabs etc.!
The only point in using this is so that people switching over to Scroogle do not have to adept to a new look&feel of the search-engine.
For a full experience of Scroogle with a Google-look also check out http://userstyles.org/styles/9573 !
Update at 20080818: The new version now works well together with the Tree Style Tab Extension (https://addons.mozilla.org/en/firefox/addon/5890) which gives you a parent -> child tab-structure and a vertical tab-bar. This update fixes the still appearing original Scroogle-Favicon in Tree Style Tab and moves the Open/Close-button for parent-tabs with the classic Google Favicon to the right place.