Examine source code of Sticky Notes for Webpages

{
  "manifest_version": 2,
  "name": "Sticky Notes for Webpages",
  "version": "1.0",
  "description": "Add and save sticky notes on any webpage.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Sticky Notes"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4f8bddbf-b9ec-49d6-9f89-59709bf90f65}"
    }
  }
}