Examine source code of ARC Toolkit

{
  "name": "ARC Toolkit",
  "version": "5.7.10",
  "manifest_version": 2,
  "description": "Accessibility testing tool from TPGi",
  "homepage_url": "https://www.tpgi.com/arc-platform/arc-toolkit/",
  "icons": {
    "16": "icon/16.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "scripting",
    "webNavigation",
    "storage",
    "clipboardWrite",
    "<all_urls>",
    "activeTab"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "background": {
    "scripts": [
      "background/main.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icon/16.png",
      "48": "icon/48.png",
      "128": "icon/128.png"
    },
    "default_popup": "popup/index.html",
    "default_title": "ARC Toolkit"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "libs/helpers.js",
        "libs/utils.js",
        "leader-line.min.js"
      ],
      "css": [
        "libs/helpers.css"
      ],
      "run_at": "document_start"
    }
  ],
  "devtools_page": "devtools/index.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "{63fbb855-d3f0-4014-a58a-2d9bff4e2779}"
    }
  }
}