Examine source code of ExperChat Screen Sharing App

{
  "name": "ExperChat Screen Sharing App",
  "author": "ExperChat, Inc.",
  "version": "1.2resigned1",
  "manifest_version": 2,
  "short_name": "ExperChat, Inc.",
  "minimum_chrome_version": "34",
  "description": "This Chrome extension is developed primary for http://tokbox.com/. It doesn't do anything except capture content of your screen.",
  "homepage_url": "http://tokbox.com/",
  "background": {
    "scripts": [
      "background-script.js"
    ],
    "persistent": false
  },
  "externally_connectable": {
    "matches": [
      "https://localhost:9001/*",
      "https://*.qa.experchat.com/*",
      "https://*.uat.experchat.com/*"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "desktopCapture"
  ],
  "web_accessible_resources": [
    "icon.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0a435e4f-7e51-4365-a631-9b870dc17f09}"
    }
  }
}