Demo for firefox plugin

I need someone to make a prototype for a Google Calendar firefox plugin. Step 4: -prototype of blocking the feature that lets users share their calendars and other collaboration features This is a step of a larger project, whose entire description I have attached. You would be hired to implement just this particular step, and will be paid right away after the completion and testing of the work. If you are successful, you might be hired for the rest of the project. This project is for a trusted client. No milestones or upfront payments will be created until the project is completed, and tested by the client, and until the client is happy. Whoever bids $50 or less will be hired immediately.