Examine source code of LibPKU Browser Extension

{
  "manifest_version": 2,
  "name": "LibPKU Browser Extension",
  "description": "Browser extension to work with LibPKU",
  "version": "0.0.3",
  "short_name": "LibPKU",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "optional_permissions": [
    "cookies"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "LibPKU Ext Popup",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c887a12-f7e7-448b-afa6-3379b8ead7a3}"
    }
  }
}