Examine source code of Discogs Preview

{
  "manifest_version": 3,
  "name": "Discogs Preview",
  "version": "1.0.0",
  "description": "Ajoute des boutons de recherche YouTube et SoundCloud aux pistes Discogs.",
  "browser_specific_settings": {
    "gecko": {
      "id": "discogs-preview@mxa",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.discogs.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ]
}