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HTTP Server header Spy version history - 3 versions

HTTP Server header Spy by dw5

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HTTP Server header Spy version history - 3 versions
  • Be careful with old versions! These versions are displayed for testing and reference purposes.You should always use the latest version of an add-on.

  • Latest version

    Version 3.0

    Released Oct 25, 2026 - 29.41 KB
    Works with firefox 140.0 and later, android 142.0 and later
    Version 3.0 – a full refresh

    New
    • IP lookup links are now grouped by purpose and include more sources useful for security work:
    – Info: ipinfo.io, infobyip.com, whatismyipaddress.com
    – Threat intel: VirusTotal, AbuseIPDB, GreyNoise, AlienVault OTX, Cisco Talos
    – Exposure: Censys, Shodan, urlscan.io, ViewDNS reverse IP
    – Network: bgp.he.net, RIPEstat
    • "Copy" button for the response headers
    • Dark mode (follows your system setting)
    • The QR code of the page URL is now behind a "QR code" toggle, so the popup stays compact

    Improved
    • The badge now shows a short server name per tab (e.g. "ngin" for nginx); hover it for the full name and IP
    • The popup no longer breaks on tabs with no captured data; it asks you to reload the page instead
    • IPv6 addresses now get a working link
    • Updated the Censys link and removed the dead ip.cn link

    Under the hood
    • Moved to Manifest V3
    • Removed jQuery and other unused code; the add-on is now about 20 KB
    • Fewer permissions: the "tabs" permission is no longer requested
    • Requires Firefox 140 or newer

    Note: Firefox may ask you to allow accever Spy needs to read response headers.If the popup shows a "Grant access" button, click it and reload the page.

    Source code released under All Rights Reserved

    Download Firefox and get the extension
    Download file
  • Older versions

    Version 2.2

    Released Feb 18, 2021 - 113.98 KB
    Works with firefox 48.0 and later
    Added Censys

    Source code released under All Rights Reserved

    Download file
  • Version 2.0

    Released Jan 2, 2021 - 112.91 KB
    Works with firefox 48.0 and later

    Source code released under All Rights Reserved

    Download file
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