Examine source code of axe DevTools® - Web Accessibility Testing

{
  "name" : "axe DevTools - Web Accessibility Testing",
  "manifest_version" : 2 ,
  "icons" : {
    "16" : "assets/images/axe16.png",
    "48" : "assets/images/axe48.png",
    "128" : "assets/images/axe128.png"
  },
  "devtools_page": "devtools.html",
  "background" : {
    "scripts" : [
      "browser-polyfill.js" ,
      "vendor.bundle.js" ,
      "background.bundle.js" 
    ],
    "persistent" : true 
  },
  "browser_action" : {
    "default_icon" : {
      "16" : "assets/images/axe16.png",
      "48" : "assets/images/axe48.png",
      "128" : "assets/images/axe128.png"
    },
    "default_popup" : "popup.html",
    "default_title" : "Axe Accessibility",
    "browser_style": true
  },
  "content_security_policy" : "script-src 'self'; object-src 'self'",
  "web_accessible_resources" : [
    "highlighter.js",
    "axe-versions/latest/axe.js"
  ],
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "js" : [
        "browser-polyfill.js" ,
        "vendor.bundle.js" ,
        "content.bundle.js" 
      ],
      "all_frames" : true ,
      "run_at" : "document_start" ,
      "match_about_blank" : true 
    }
  ],
  "permissions" : [
    "tabs" ,
    "storage" ,
    "activeTab" 
  ],
  "storage": {
    "managed_schema": "schema.json"
  },
  "description" : "Accessibility Checker for Developers, Testers, and Designers in Firefox",
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "91.0",
      "id": "@axe-firefox-devtools"
    }
  },
  "version" : "4.117.1"
}