Examine source code of Planilha Odebrecht

{
  "manifest_version": 2,
  "name": "Planilha Odebrecht",
  "version": "1.0.3",
  "description": "Substitui nomes de políticos pelo apelido da Odebrecht",
  "icons": {
    "32": "icons/odebrecht-32.png",
    "64": "icons/odebrecht-64.png",
    "96": "icons/odebrecht-96.png",
    "128": "icons/odebrecht-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "odebrecht.js"
      ]
    }
  ]
}