Examine source code of Auto Proxy Retry

{
  "manifest_version": 2,
  "name": "Auto Proxy Switcher",
  "version": "2.0",
  "description": "Retries requests with a proxy on specific HTTP errors.",
  "browser_specific_settings": {
    "gecko": {
      "id": "auto-proxy-retry@ftk",
      "strict_min_version": "91.1.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "proxy",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": false
  }
}