Merlin
IPvFoo

IPvFoo

Display the server IP address, with a realtime summary of IPv4, IPv6, and HTTPS information across all page elements.

What is IPvFoo?
IPvFoo is a comprehensive Firefox addon aimed at enhancing everyday awareness of the IPv4 to IPv6 transition. It displays the IP address of servers and provides a detailed, real-time summary of IPv4, IPv6, and HTTPS information for all elements on a page. Protecting user privacy, this extension treats the network as read-only and stores data in RAM. It shows a large red 4 or a green 6 to indicate whether the page was fetched using IPv4 or IPv6, and offers relevant information for each domain connected on a page.
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Merlin
Stats
Rating: 4.75 (36)
Version: 2.18 (Last updated: 2023-12-11)
Creation date: 2017-08-26
Weekly download count: 114
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 3
Permissions:
  • contextMenus
  • storage
  • webNavigation
  • webRequest
Host permissions:
  • <all_urls>
Size: 47.48K
Stats date:

Chrome-Stats Rank

# 1123 ▲ 7
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Other platforms

IPvFoo
IPvFoo (v2.18)
4.83 (178) 100,000
Not available on Edge
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Merlin
Summary
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I made this extension to raise everyday awareness of the global IPv4 to IPv6 transition. To respect your privacy, it keeps data in RAM and treats the network as read-only. I can maintain this without ads because there are no server costs.

If you only see a blue "?" icon, you may need to click it, then click the big "grant permission" button and reload the page. Manifest V3 is fun!

IPvFoo's action icon shows a large red 4 or green 6 to indicate whether the outer page was fetched using IPv4 or IPv6. If the page connects to other domains, a smaller 4 or 6 appears alongside.

When you click the icon, a table appears with a row for each domain:

  • A padlock icon for http://, https://, or a mix of both.

  • The IPv4 or IPv6 address. If connections span more than one address, the most recent one wins. The address is highlighted in yellow while connections are open.

  • "⭮" for cached requests. The IP address may be stale if no connection was made.

  • "S" for WebSocket handshakes. The connection may still be active even if the address is not highlighted.

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User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Recommended extension with open-source code which can be trusted after review
  • Simple and reliable
  • Helpful for viewing if websites give priority to IPV6
  • Great for information
Cons
  • Shows IP of local proxy-server instead of the actual IP
  • Access denied on addons.mozilla.org
  • Does not work on heavily restricted systems with a whitelisting firewall
Most mentioned
  • Easy to use
  • Reliability issues in heavily restricted systems
  • Useful for checking prioritization of IPV6 on websites
Recent reviews
exactly what I was looking for... Thanks!
by Firefox user 18373085, 2024-04-15
very helpful for debugging network issues
by Fubwubs, 2024-02-20
View all user reviews
Safety
Risk impact

IPvFoo is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install IPvFoo if you trust the publisher.

Risk likelihood

IPvFoo is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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Screenshots
IPvFoo IPvFoo IPvFoo