Examine source code of Offset Smokers

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon_32.png",
    "default_title": "Extension For iqra"
  },
  "description": "Extension description here",
  "icons": {
    "16": "icons/icon_16.png",
    "32": "icons/icon_32.png",
    "48": "icons/icon_48.png",
    "64": "icons/icon_64.png",
    "128": "icons/icon_128.png"
  },
  "manifest_version": 2,
  "name": "Offset Smokers",
  "short_name": "Offset Smokers",
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.0"
}