Examine source code of Q to H

{
  "manifest_version": 2,
  "name": "Q to H",
  "description": "Redirects QRZ callsign lookups to HamQTH.",
  "version": "1.1",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png",
    "255": "icon/255.png"
  },
  "default_locale": "en",
  "permissions": [
    "declarativeNetRequestWithHostAccess",
    "http://www.qrz.com/",
    "https://www.qrz.com/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@qtoh.cniesen",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset",
        "enabled": true,
        "path": "rules/rules.json"
      }
    ]
  },
  "browser_action": {
    "default_title": "Q to H Browser Extension",
    "default_popup": "popup.html"
  }
}