Firefox addon developer

I am looking for an addon developer, who will be able to modify few existing addons (eg. Autohide status bar) and also to create New addons. You should be an expert firefox addon developer who can develop New firefox addon as well as modify existing addons easily. Quote your budget for 5 addons which will be given to you 1 by one over the next 3 months period. There may be more development works depending upon your performance. Keywords: Firefox, addon, add-on, addons, add-ons