Examine source code of Restfox CORS Helper

{
  "name": "Restfox CORS Helper",
  "description": "Help bypass CORS when making requests from Restfox",
  "version": "1.0.4",
  "manifest_version": 2,
  "icons": {
    "512": "icons/favicon.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://restfox.dev/*"
      ],
      "js": [
        "browser-polyfill.js",
        "content-script.js"
      ]
    }
  ],
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "512": "icons/favicon-disabled.png"
    },
    "show_matches": [
      "https://restfox.dev/*"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{721e895f-11a4-401d-8544-50d8665f534c}"
    }
  }
}