Examine source code of UNT - Nile Post

{
  "manifest_version": 2,
  "name": "UNT - Nile Post",
  "version": "1.0",
  "description": "Uganda News Tracker - Nile Post monitors the number of new articles on NilePost website",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "https://nilepost.co.ug/"
  ],
  "browser_action": {
    "default_title": "Check for new articles",
    "default_popup": "popup.html"
  },
  "icons": {
    "600": "icons/icons-600.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{510d00e6-8c38-48f3-8830-c7b741f4aea8}"
    }
  }
}