Examine source code of Web Navigation Window

{
  "manifest_version": 2,
  "version": "0.3",
  "default_locale": "en_US",
  "name": "__MSG_extension_name__",
  "browser_action": {
    "default_title": "__MSG_extension_name__",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "64": "icon-64.png"
    }
  },
  "permissions": [
    "history"
  ],
  "web_accessible_resources": [
    "ui.html",
    "util.js",
    "navigation.js",
    "network.js",
    "lib/vis-network.min.js",
    "lib/uri.all.min.js"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}