Examine source code of Angular DevTools

{
  "manifest_version": 2,
  "short_name": "Angular DevTools",
  "name": "Angular DevTools",
  "description": "Angular DevTools extends Firefox DevTools adding Angular specific debugging and profiling capabilities.",
  "version": "1.16.0",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "icons": {
    "16": "assets/icon16.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "browser_action": {
    "default_popup": "popups/not-angular.html"
  },
  "devtools_page": "devtools.html",
  "web_accessible_resources": [
    "app/backend_bundle.js",
    "devtools.html"
  ],
  "background": {
    "scripts": [
      "app/background_bundle.js"
    ]
  },
  "permissions": [
    "activeTab",
    "storage",
    "http://*/*",
    "https://*/*",
    "file:///*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "app/ng_validate_bundle.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "app/content_script_bundle.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{20a9bb38-ed7c-4faf-9aaf-7c5d241fd747}"
    }
  }
}