Examine source code of Plan Pilot

{
  "name": "Plan Pilot",
  "version": "0.0.1",
  "manifest_version": 2,
  "description": "A simplistic to-do-list with two checklists that allows users to add, edit, cross-out, and remove items from the checklists. ",
  "icons": {
    "48": "Plan-Pilot-small.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": "Plan-Pilot-small.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{376fcc44-18bd-4a4a-a12f-05fd36578e08}"
    }
  }
}