Browser Plugin / Toolbar Professionals wanted for FF, IE, GC, SF

What we need is a browser extension/addon (Toolbar) that works on FF / IE / Chrome and Safari. We have a Toolbar already created for FF. This Toolbar needs to be modified slightly by you and made compatible to newer FF versions to meet our final needs. As the Result this FF Toolbar will be considered as our original model to reproduction for other Browsers. IF you prefer, you can also built the required FF Toolbar from scratch instead of using existing code. Then this exact Toolbar need to be replicated for IE, Chrome (Button) and Safari, what is technically possible and useful. **PLEASE NOTE: If you cannot do ALL of the above, please let us know which you can do and we will happily split the project into separate projects if it turns out we can't find one person to do all toolbars. This Toolbar is for an affiliate based website and does basically this: Upon opening browser, it fetches a list of partnerstores from our server (XML). Then it scans any webpages loaded for certain patterns and if found replace the text by something else in the source. For example: A user loads a webpage where a affiliate link is, the link is recognised and replaced by one of our link, using a matching pattern. These Toolbars are common for affiliate based websites, so if you have done such toolbars for other clients before, you should find it easy to replicate a similar one. All images and icons will be provided for the developer. More details will be provided to selected providers. Only Providers who can show good track record and samples please. Thank you for your proposals!