Examine source code of Flavormate

{
  "manifest_version": 2,
  "name": "Flavormate",
  "version": "0.0.1",
  "description": "Recipe manager",
  "browser_action": {
    "default_title": "Flavormate",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "https://flavormate.co/*",
    "tabs",
    "cookies",
    "<all_urls>"
  ],
  "icons": {
    "48": "assets/logo48.svg",
    "96": "assets/logo96.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{40690843-5606-4ae2-b3ef-d5ef4b45dd4e}"
    }
  }
}