Examine source code of MapWand

{
  "name": "MapWand",
  "description": "View more school and price info on Realtor.ca/HouseSigma/Zealty.ca/Property.ca.",
  "version": "0.17.0",
  "manifest_version": 3,
  "background": {
    "scripts": [
      "serviceWorker.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "mapwand.ca@gmail.com",
      "strict_min_version": "58.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.realtor.ca/*",
        "https://*.housesigma.com/*",
        "https://*.zealty.ca/*",
        "https://*.property.ca/*",
        "https://*.condos.ca/*",
        "https://*.mrloft.ca/*"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "injectedJs.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "permissions": [
    "storage",
    "webRequest",
    "alarms"
  ],
  "host_permissions": [
    "*://*.realtor.ca/*",
    "*://*.locallogic.co/*",
    "*://*.compareschoolrankings.org/*",
    "*://*.eqao.com/*",
    "*://*.honestdoor.com/*",
    "*://*.housesigma.com/*",
    "*://*.zealty.ca/*",
    "*://*.property.ca/*",
    "*://*.condos.ca/*",
    "*://*.mrloft.ca/*"
  ],
  "action": {
    "default_title": "MapWand",
    "default_popup": "popup.html",
    "default_icon": {
      "128": "/icons/icon.png"
    }
  },
  "icons": {
    "128": "/icons/icon.png"
  },
  "externally_connectable": {
    "matches": [
      "*://*.realtor.ca/*",
      "*://*.housesigma.com/*",
      "*://*.zealty.ca/*",
      "*://*.property.ca/*",
      "*://*.condos.ca/*",
      "*://*.mrloft.ca/*"
    ]
  }
}