Examine source code of gRPC-Web Developer Tools

{
  "name": "gRPC-Web Developer Tools",
  "version": "1.4.1",
  "manifest_version": 2,
  "description": "gRPC-Web Developer Tools for debugging application's gRPC-Web network requests.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "devtools_page": "devtools.html",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "connect-web-interceptor.js"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{418ae587-206e-4cdd-aff4-1f2be9c46eeb}"
    }
  }
}