Examine source code of TuneEase

{
  "name": "TuneEase",
  "version": "4.8",
  "description": "A browser extension that helps you control music while using Spotify.",
  "permissions": [
    "menus",
    "storage",
    "https://www.tunease.com/*"
  ],
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.tunease.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "images/tunease-16x16.png",
      "48": "images/tunease-48x48.png",
      "128": "images/tunease-128x128.png"
    },
    "default_title": "TuneEase",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "images/tunease-16x16.png",
    "48": "images/tunease-48x48.png",
    "128": "images/tunease-128x128.png"
  },
  "homepage_url": "https://www.tunease.com",
  "author": "dzungnguyen179@gmail.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e3bcbe9-fa55-4be5-8584-e38fb68fff18}"
    }
  }
}