Examine source code of Web Assistant Extension

{
  "name": "Web Assistant Extension",
  "version": "1.0.0.1",
  "description": "This extension allows to use Web Assistant across websites and applications.",
  "browser_specific_settings": {
    "gecko": {
      "id": "webAssistantExtension@enable-now.com"
    }
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "images/icon-extension-16.png",
    "32": "images/icon-extension-32.png",
    "48": "images/icon-extension-48.png",
    "128": "images/icon-extension-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "page.js"
      ]
    }
  ],
  "options_ui": {
    "page": "sites/options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_popup": "sites/popup.html",
    "default_icon": {
      "16": "images/icon-extension-16.png",
      "32": "images/icon-extension-32.png",
      "48": "images/icon-extension-48.png",
      "128": "images/icon-extension-128.png"
    }
  },
  "manifest_version": 2
}