Examine source code of TiF goCad

{
  "manifest_version": 2,
  "name": "TiF goCad",
  "author": "TiF Production",
  "version": "4.2",
  "description": "Recherche rapides et accès aux applications métiers pour les agents du Cadastre",
  "icons": {
    "48": "icons/goCad-48.png",
    "96": "icons/goCad-96.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "notifications",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "js/bg.js"
    ]
  },
  "page_action": {
    "default_icon": "icons/goCad-32.png",
    "default_title": "TiF goCad",
    "default_popup": "index.html",
    "show_matches": [
      "<all_urls>"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.appli.impots/*"
      ],
      "run_at": "document_idle",
      "js": [
        "js/commun.js",
        "js/impots.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    "notice/notice.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "goCad@TiFProduction.fr"
    }
  }
}