Examine source code of Lumen for Gemini

{
  "manifest_version": 3,
  "name": "Lumen",
  "version": "1.3.0",
  "description": "Gemini-powered page Q&A and summarization",
  "browser_specific_settings": {
    "gecko": {
      "id": "lumen@csequeira",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/icon.svg"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "activeTab",
    "scripting"
  ]
}