Examine source code of Excalibur Dev Tools

{
  "name": "Excalibur Dev Tools",
  "author": "Erik Onarheim & contributors",
  "version": "1.0.6",
  "description": "Excalibur.js browser plugin for debugging your games",
  "manifest_version": 3,
  "devtools_page": "devtools.e4d9530b.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "excalibur-dev-tools@caliburn.games",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "tabs",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.4132cebb.js"
    ]
  },
  "host_permissions": [
    "http://localhost/*",
    "http://*/*",
    "https://*/*",
    "file://*/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self';style-src 'self' 'unsafe-inline';"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "up_/excalibur-panel.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "16": "icon-16.ee228ddb.png",
    "32": "icon-32.b15bb9d9.png",
    "48": "icon-48.cce7e20f.png",
    "64": "icon-64.fe94a5a1.png",
    "128": "icon-128.193da8b6.png"
  }
}