App or widget development - rating system; browser integration

I need an app/widget created. There should also be a connected website. It will be a rating system. I need coding and design, though happy if you can only bid on one of these two aspects. Must be an app that can be integrated in latest firefox. For more details about specifics, you will have to message me. I need an SoW to start with, followed by swift development. Please let me know your separate charges for SoW and for development. ## Deliverables I need you to send samples of apps developed and their successes and uptake. Expertise in design, look-and-feel and viral spread of such apps is a plus.