This sidebar displays page meta-information (metatags, links, etc.) Has automated search engine submission menu. Features include: Watches currently loaded Web page and automatically updates the sidebar. Displays metatags, links, language, base and base folder of the document, MIME type and charset, DTD, root tag, and XML namespace, last modification time, referrer, etc. Keywords are numbered. Warns about duplicate keyword phrases (emphasizes them with red color). Extensible menu for automatic submission to search engines and SEO services. (Forms are filled automatically, based on document metadata.) Related links (by Alexa and Amazon) and other Web services. Tabbed browsing is supported. Menu in the sidebar and in browser's Tools menu. Preferences dialog box. Integrated with Live HTTP Headers Firefox extension.