Examine source code of ECSR Catalog Notifier

{
  "manifest_version": 2,
  "name": "ECSR Catalog Notifier",
  "version": "1.0",
  "description": "Notifies you when new featured items are added to ECSR catalog.",
  "permissions": [
    "cookies",
    "https://ecsr.io/*",
    "notifications",
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "ECSR Notifier"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ecsrnotifier@yourdomain.com"
    }
  }
}