Toolbar For IE and Firefox (Browser Plugin)

We need a toolbar for IE and Firefox. The final product should be a fully functional toolbar, an install + uninstall wizard, and the source code. Some of the needed functions * offer users links to multiple sites, which I will provide * offer a search box to search the web * contain a spot for our logo or company name * the toolbar also needs to be able to be ported to work on internet explorer as well as. When toolbar is enabled and installed it should work like any other toolbar. The toolbar must also have a way to enable/disable it using something like an on/off button. open to coder suggestions on how to make this work. The IE version should work on IE7 and should be as backward compatible as possible on old versions of IE and windows. Likewise the firefox plugin should run on the latest version of firefox on linux and the Mac OS. It should be as backward compatible as possible with old versions of firefox. I have a specific example and can provide it in private message. I would also like examples of previous firefox/mozilla extension/toolbar work.