Examine source code of JWT Debugger

{
  "manifest_version": 2,
  "name": "JWT Debugger",
  "description": "The JWT.io debugger as a Web Extension",
  "version": "3.2.0",
  "browser_action": {
    "default_icon": "img/favicon/favicon-96x96.png",
    "default_popup": "index.html"
  },
  "background": {
    "page": "bg.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://jwt.io/*"
      ],
      "js": [
        "js/check-install.js"
      ]
    }
  ],
  "icons": {
    "16": "img/favicon/favicon-16x16.png",
    "32": "img/favicon/favicon-32x32.png",
    "48": "img/favicon/android-icon-48x48.png",
    "96": "img/favicon/favicon-96x96.png",
    "192": "img/favicon/android-icon-192x192.png"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+K",
        "mac": "Command+Shift+K",
        "linux": "Ctrl+Shift+K"
      }
    }
  },
  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",
  "permissions": [
    "activeTab",
    "<all_urls>",
    "cookies",
    "storage",
    "clipboardRead",
    "clipboardWrite"
  ]
}