Examine source code of Startup Tab Unloader

{
  "manifest_version": 2,
  "name": "Startup Tab Unloader",
  "version": "1.0.0",
  "description": "Automatically unloads (discards) tabs when Firefox starts up to save memory.",
  "author": "Claude",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Startup Tab Unloader",
    "default_icon": {
      "16": "icons/icon16.svg",
      "32": "icons/icon32.svg",
      "48": "icons/icon48.svg"
    }
  },
  "icons": {
    "16": "icons/icon16.svg",
    "32": "icons/icon32.svg",
    "48": "icons/icon48.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "startup-tab-unloader@claude",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}