Firefox extension/add-on for proxy toggle - on/off

We run [login to view URL] - the Premiere FREE VPN service provider - [login to view URL] We are looking to have a Firefox add one created that will basically be an on/off switcher for a proxy. See the attached mockup. The add one will work like this: 1) user installs plugin 2) our ICON will show to the right of the URL field as shown in the attachment. 3) When the user clicks the icon it turns ON the "preconfigured" VPNReactor proxy settings. 4) When user clicks the icon again it turns the proxy OFF. It then reverts back to "auto-detect" in the network prefs 5) When Proxy is on it turns GREEN. When Proxy is off it turns RED. 6) This is optional if easy. Setup VPNReactor prefs menu in the main menu window. For now the prefs window will just have text and a link to our site. This will be very easy for the right developer. Once done with Firefox will would like to post a new project to make a Chrome extension. Must be cross platform for both Mac and Windows. Good Luck Bidding.