Examine source code of SpeedVitals

{
  "manifest_version": 2,
  "name": "SpeedVitals",
  "version": "2.4.1",
  "description": "Perform Web Vitals & TTFB Test on Multiple Locations & Devices",
  "homepage_url": "https://speedvitals.com",
  "author": "contact@speedvitals.com",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png",
    "180": "icons/180.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "cookies",
    "https://*.speedvitals.com/",
    "https://*.speedvitals-dev.com/"
  ],
  "browser_action": {
    "default_icon": "icons/48.png",
    "default_title": "SpeedVitals",
    "default_popup": "popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5cb047f5-1f7f-4aaf-b349-f8bce83a6ee3}"
    }
  }
}