Examine source code of SiteSonar

{
  "description": "Investigating the worst players in slow-loading advertisements on the web.",
  "manifest_version": 2,
  "name": "site-sonar",
  "version": "1.2resigned1",
  "homepage_url": "https://github.com/FrancescoSTL/Site-Sonar",
  "icons": {
    "48": "icons/border-48.png"
  },
  "background": {
    "scripts": [
      "js/web-crawler.bundle.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/border-48.png",
    "default_title": "Site Sonar Dashboard",
    "default_popup": "views/userReport.html"
  },
  "permissions": [
    "storage",
    "webRequest",
    "webNavigation",
    "alarms",
    "tabs",
    "https://ultra-lightbeam.herokuapp.com/log"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e983e36-0341-4c1e-875d-5c107f6bc79c}"
    }
  }
}