XUL - Sidebar

The project is very simple what we need is a XUL Sidebar for FireFox with the flowing features 1. the sidebar should be minimize like FireBug 2. the sidebar should be in hte left side and have an icon in the bottom of the screen exactly like fire bug with indication if it's on or off 3. the side bar should keep it state after closing for example if in the side bar there is 3 tabs and the second tab is selected, if the user closes the side bar and open it, the second tab should be selected 4. the side bar need to have an option to be open in a new window - Like fire bug we need only the structure the Inside of the Sidebar is empty ** The code must be readable tide and with remarks **