Examine source code of Three.js Developer Tools

{
  "name": "Three.js Developer Tools",
  "version": "0.4.0",
  "description": "Developer tools for 3D library three.js.",
  "devtools_page": "src/extension/devtools.html",
  "background": {
    "page": "src/extension/background.html"
  },
  "icons": {
    "128": "assets/icon_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "src/extension/contentScript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "webNavigation",
    "http://*/*",
    "https://*/*"
  ],
  "web_accessible_resources": [
    "src/content/*.js"
  ],
  "manifest_version": 2,
  "author": "Jordan Santell",
  "browser_specific_settings": {
    "gecko": {
      "id": "three-devtools@jsantell.com"
    }
  }
}