Examine source code of EasyBNF redirect

{
  "manifest_version": 2,
  "author": "Marc Brillault",
  "homepage_url": "https://github.com/MarcBrillault/easybnf-redirect",
  "name": "EasyBNF redirect",
  "version": "1.0.1",
  "description": "Redirige les liens vers les articles gérés par leur équivalent via le site de la BNF",
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.mediapart.fr/*",
        "https://www.arretsurimages.net/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{74a8c987-db6e-46b6-9521-7bdd8cc2795a}"
    }
  }
}