Examine source code of Test Screenshot Extension

{
  "name": "Test Screenshot Extension",
  "version": "1.3.5",
  "description": "Demonstrate screenshot functionality in the chrome.tabs api.",
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "camera.png",
    "default_title": "Take a screen shot!"
  },
  "permissions": [
    "activeTab"
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{2b4a6f93-cc83-4dfb-835f-8890716a539c}"
    }
  }
}