Examine source code of Gemini Auto Listen

{
  "manifest_version": 3,
  "name": "Gemini Auto Listen",
  "version": "1.0.0",
  "description": "Automatically clicks the Listen button on new Gemini responses",
  "browser_specific_settings": {
    "gecko": {
      "id": "gemini-auto-listen@srmooon.github.io",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://translate.google.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://gemini.google.com/*",
        "https://aistudio.google.com/*",
        "https://*.google.com/gem/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  }
}