Examine source code of Link Health Check

{
  "manifest_version": 3,
  "name": "Link Health Check",
  "version": "1.0",
  "description": "Link Health Check scans the current web page for all hyperlinks and verifies their status (active, broken, redirected, malicious). It highlights problematic links directly on the page, helping users identify dead ends or suspicious redirects before clicking.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "link_health_check.png"
  },
  "icons": {
    "128": "link_health_check.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "idaconleyrkfz35@hotmail.com"
    }
  }
}