Examine source code of Favoris

{
  "manifest_version": 2,
  "name": "Favoris",
  "version": "1.0",
  "description": "A simple bookmark manager with mosaic grid layout",
  "browser_specific_settings": {
    "gecko": {
      "id": "favoris@energetic-armadillo.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.svg"
    },
    "default_title": "Favoris",
    "default_popup": "index.html"
  },
  "permissions": [
    "storage"
  ]
}