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"
}