Examine source code of Glosario Bdmat

{
  "name": "Glosario Bdmat",
  "description": "Añade un item en el menú contextual al seleccionar un texto",
  "version": "1.5resigned1",
  "permissions": [
    "contextMenus",
    "activeTab",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "glosbdmat.js"
    ]
  },
  "icons": {
    "48": "icons/glos48.png",
    "96": "icons/glos96.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{ec4da3e1-3c2e-4bf3-a41d-0377a6f99dd0}"
    }
  }
}