Examine source code of ServiceNow Link Manager

{
  "name": "ServiceNow Link Manager",
  "description": "This extension ensures that record urls opened in ServiceNow do not spawn multiple tabs, consolidating them into a single workspace.",
  "version": "1.1",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "nowlink-manager@example.com",
      "data_collection_permissions": {
        "required": [
          "locationInfo"
        ]
      }
    }
  },
  "action": {
    "default_popup": "hello.html",
    "default_icon": {
      "16": "now-extension.png",
      "48": "now-extension.png",
      "128": "now-extension.png"
    }
  },
  "permissions": [
    "tabs",
    "management",
    "scripting",
    "storage",
    "webNavigation"
  ],
  "icons": {
    "16": "now-extension.png",
    "48": "now-extension.png",
    "128": "now-extension.png"
  },
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "service_worker.js"
    ]
  }
}