Examine source code of Twitter Scheduler

{
  "manifest_version": 2,
  "name": "Twitter Scheduler",
  "version": "1.0",
  "description": "Schedule tweets to be posted automatically at a specified time.",
  "permissions": [
    "https://api.twitter.com/*",
    "storage",
    "alarms",
    "notifications"
  ],
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icons/logo_32.png",
      "64": "icons/logo_64.png",
      "128": "icons/logo_128.png"
    },
    "default_title": "Schedule a Tweet"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{78ad1887-996e-4f40-af97-7d91e6b119d9}"
    }
  }
}