Examine source code of Crypto Tracker Lite

{
  "manifest_version": 3,
  "name": "Crypto Tracker",
  "version": "1.0",
  "description": "Track cryptocurrency prices",
  "icons": {
    "16": "files/img/icon-16.png",
    "48": "files/img/icon-48.png",
    "128": "files/img/icon-128.png"
  },
  "browser_action": {
    "default_icon": "files/img/icon-48.png",
    "default_popup": "extension.html"
  },
  "background": {
    "scripts": [
      "extension.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "kamenaction00@gmail.com"
    }
  }
}