Examine source code of Scroll Ease

{
  "manifest_version": 3,
  "name": "Scroll Ease",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "@scroll-ease.ravi-anand"
    }
  },
  "action": {
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/book-icon-16.png",
    "32": "icons/book-icon-32.png",
    "64": "icons/book-icon-64.png"
  }
}