Examine source code of timeshifter

{
  "manifest_version": 2,
  "name": "timeshifter",
  "description": "Captura informações de navegação e envia para o app do timeshifter, para criar um timesheet com IA.",
  "version": "1.3",
  "permissions": [
    "tabs",
    "scripting",
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    },
    "default_title": "timeshifter"
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "labella@timeshifter.com.br"
    }
  }
}