Browser Toolbar Extension/Addon

Hi, I'd like a browser toolbar extension developed as follows. - The extension adds an icon to the browser toolbar - When the user is visiting a Wordpress based site and clicks the toolbar icon a small informational section appears below the icon which displays the Wordpress Theme and all of the plugins that are being used (this is accomplished by the toolbar performing a search through the source code of the site). - If the user then clicks on an item in the list which is displayed then the extension opens a new tab in the browser and searches Google for that item. More specific details will be given but this gives you an overview. Please reply with: 1. The words "browser developer" in your message 2. How long this would take you to get a beta version working 3. Your experience of developing extensions for Firefox, Chrome and IE (we'll start with one and probably port to the others later) Many thanks, Rob.