Examine source code of create notes taking site

{
  "manifest_version": 2,
  "name": "create notes taking site",
  "version": "1.0",
  "description": "We are going to make a website that will take our notes and saves them for our future",
  "permissions": [],
  "browser_action": {
    "default_popup": "game.html",
    "default_icon": {
      "128": "images/note-logo.png"
    }
  },
  "icons": {
    "128": "images/note-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d5641955-178b-4b1e-821b-3a52a136e522}"
    }
  }
}