Examine source code of Fake Info Generator

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDescription__",
  "version": "1.0.1",
  "short_name": "__MSG_appShortName__",
  "manifest_version": 2,
  "default_locale": "pt_BR",
  "icons": {
    "16": "images/document-icon.svg",
    "48": "images/document-icon.svg",
    "128": "images/document-icon.svg"
  },
  "browser_action": {
    "default_icon": {
      "38": "images/document-icon.svg",
      "48": "images/document-icon.svg"
    },
    "default_title": "__MSG_appName__",
    "default_popup": "popup/popup.html",
    "browser_style": true
  },
  "permissions": [
    "storage"
  ]
}