Examine source code of Gemini Cleaner

{
  "manifest_version": 3,
  "name": "Gemini Cleaner",
  "version": "1.3.0",
  "description": "A clean, distraction-free Gemini experience. Hides upgrade buttons, upsells, and footer disclaimers.",
  "author": "Alex",
  "browser_specific_settings": {
    "gecko": {
      "id": "gemini-cleaner@alexmld.com",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://gemini.google.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "settings.js",
        "content-logic.js",
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "homepage_url": "https://github.com/alax1n/gemini-cleaner"
}