Examine source code of WCAG Auditor Pro

{
  "manifest_version": 2,
  "name": "WCAG Auditor",
  "version": "2.0.3",
  "description": "Manual WCAG 2.2 checklist for accessibility auditing",
  "browser_action": {
    "default_title": "WCAG Auditor - Click to open sidebar",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "https://www.wcagworkflow.com/*",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "auth-callback.html",
    "auth-callback.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{70205c9e-9c85-4cde-89d3-64f9d667cd8b}"
    }
  }
}