As an addition to our recent coverage of ways people are tinkering with the new version of Firefox 3, check out Webworkerdaily's coverage of three more useful Firefox extensions. Mike reports that all three have been stable for him on Firefox 3 for Mac OS X. Colorzilla is a flexible color management utility, HTML Validator brings HTML validation features to Firefox, and CyberSearch adds advanced Google Search capabilities to the Firefox 3 address bar. Check out WWD's report on three more ways to supercharge Firefox.