Examine source code of Gemini Power Kit

{
  "manifest_version": 2,
  "name": "Gemini Power Kit: Your Essential Companion",
  "description": "Supercharge Gemini with Chat Outline, Quick Follow-up & Prompt Chaining. The ultimate power kit for productivity.",
  "version": "0.9.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png",
    "512": "icon/512.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "notifications",
    "webRequest",
    "webRequestBlocking",
    "*://gemini.google.com/*"
  ],
  "web_accessible_resources": [
    "url-monitor-main-world.js",
    "theme-sync-main-world.js",
    "icon/512.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "gemini-power-kit-ff@ronktsang.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "persistent": true,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Gemini Outline Settings",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://gemini.google.com/*"
      ],
      "run_at": "document_idle",
      "css": [
        "content-scripts/content.css"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}