Examine source code of uberAgent MV2

{
  "manifest_version": 2,
  "name": "uberAgent",
  "description": "Enables uberAgent to collect web app usage and performance data (e.g., foreground tab, page load duration) from Firefox.",
  "homepage_url": "https://www.uberagent.com",
  "version": "3.1.1",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "applications": {
    "gecko": {
      "id": "{2e53b2d2-1bdf-446a-8f9d-9be4173886fe}",
      "strict_min_version": "60.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon32.png",
    "default_title": "uberAgent",
    "default_popup": "uberAgent.html"
  },
  "permissions": [
    "alarms",
    "tabs",
    "nativeMessaging",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ]
}