Examine source code of PGN to Lichess

{
  "manifest_version": 2,
  "name": "PGN to Lichess",
  "version": "1.2.0",
  "description": "Quickly open PGNs and Chess.com games in Lichess",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "index.html"
  },
  "permissions": [
    "menus",
    "storage"
  ],
  "optional_permissions": [
    "notifications"
  ],
  "icons": {
    "256": "lichess.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{12cadbbb-b6db-4196-8261-020291c0c502}",
      "strict_min_version": "77.0"
    }
  }
}