Shows IP of host in current tab with latest webExt tech. Intend to replace the old showIP add-on and maybe flagfox if not updated before November. ;) (Written all by myself from scratch, feel free to fork, comment, suggest.)

What is WhatIP?
WhatIP is a Firefox add-on that brings an icon in the URL bar to show the IP version of the connected host. It also allows users to hover over the icon to see the actual IP and click to look up the host's IP on domaintools.
Users: 126
Rating: 5.00 (2)
Version: 0.2a (Last updated: 2017-08-25)
Creation date: 2017-08-17
Weekly download count: 1
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
  • tabs
  • webRequest
  • <all_urls>
Size: 18.34K
URLs: Website
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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  • This extensions brings an icon in the URL (address) bar which shows "v4" when connected to an host via IPv4 and "v6" when connected via IPv6. (Shows "v?" when local or undetermined).
  • Hover over the icon to see the actual IP to which you just made a request.
  • Click the icon to look up host's IP on domaintools in a new Tab. (Only when IP is not undefined.)
Please acknowledge that the showed IP is relevant to the "main_frame" (the main webpage structure) of the host you connected to, and that your browser made at least twice or three times more requests to different hosts and IP's to draw the page your are seeing. That is to say, connecting to a page means you connect seamlessly to many other services and other servers.


  • 0.2a Hotfix from 24/08/17
    • Fixed: removed previously added unnecessary webNavigaton permission. (Tried stuff and forgot to remove it)
    • activeTab permission was also unnecessary.
    • Fixed: icon and IP not updated when local scheme such as about:about. IP is now set to "Undefined" in such cases.
    • The domaintools lookup when clicking the icon is only performed if the IP of host if different from "Undefined".
  • 0.2 Version from 22/08/17
    • Code and style reformat by yfdyh000.
    • webRequest event changed from onCompleted to onHeadersReceived by gloomy-ghost.
    • Fixed: issue where icon icon disappeared after clicking a link.
    • Now using a map to keep track of 'host' and 'ip' and 'ipProtocolVersion' for each tabs.
    • New Feature: when clicking icon, opens a tab to look up IP on domaintools.
  • 0.1 Version from 17/08/17
    • Initial version.
    • Icons for IPv4 and IPv6.
    • Shows IP as tooltip.
User reviews
Gan Jing World is a clean, curated universe and a dynamic, overlapping network of integrated platforms and services. ==> https://www.ganjing.com
by GanJingWorld, 2022-12-26
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Risk impact

WhatIP 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 WhatIP if you trust the publisher.

Risk likelihood

WhatIP has earned a fairly good reputation and likely can be trusted.

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