Examine source code of Task Due Date Setter

{
  "manifest_version": 2,
  "name": "Todoist Manager",
  "version": "1.1",
  "description": "Manage your tasks directly from Firefox.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/icon48.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f333a67-a2c6-46ea-b902-07b086f91eec}"
    }
  }
}