Examine source code of RedirectLTMO

{
  "manifest_version": 2,
  "name": "Redirect",
  "version": "1.2.10",
  "description": "Redirecciona las paginas de lectortmo",
  "icons": {
    "48": "icons/border-48.png"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/news/*"
      ],
      "js": [
        "redi.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ac0993cc-3e58-4110-a6da-8d33c054d34f}"
    }
  }
}