Examine source code of Chameleon Background

{
  "manifest_version": 2,
  "name": "Hotel Search Helper",
  "version": "1.0",
  "description": "Quickly search for hotels on Booking.com",
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon-48.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2766c7bc-b6ee-4419-acfa-0d8f44d44263}"
    }
  }
}