Examine source code of HIGHTEST

{
  "description": "HighTest Technology Ltd. - Transformer Test Equipment",
  "manifest_version": 2,
  "name": "HIGHTEST",
  "version": "1.0",
  "homepage_url": "https://www.hightest.co.uk/",
  "icons": {
    "16": "icon-16x16.png",
    "32": "icon-32x32.png",
    "48": "icon-48x48.png",
    "128": "icon-128x128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon-32x32.png"
  }
}