Examine source code of Delete My Google Photos

{
  "manifest_version": 3,
  "name": "Delete My Google Photos",
  "version": "1.0.0",
  "description": "Delete photos from your Google Photos library with one click.",
  "permissions": [
    "activeTab"
  ],
  "action": {
    "default_popup": "src/popup/index.html",
    "default_icon": {
      "48": "icons/icon48.png"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "src/background/index.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://photos.google.com/*"
      ],
      "js": [
        "src/content-scripts/index.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "delete-my-google-photos@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}