Firefox add-on with keyword - lookup
Add-ons (also known as extensions) are small programs that run inside web browsers like Mozilla Firefox. They add extra features to the browser without having to download anything new. You can use extensions to make browsing faster, easier, and safer. Some extensions even let you do things like translate text on websites, search the web, and play games.
There are over 28,000 Firefox-addons and 480,000 themes, making it hard to find the best ones. so we have created a way to sort through all of them. Use the dropdown above to set different filters. Add-ons are sorted by number of active users.
To set even more advanced filters, and sort the Firefox add-ons differently, please visit our Advanced search tool. Note that Advanced search tool is only available to premium members.
![IP Location Lookup](https://addons.mozilla.org/user-media/addon_icons/2601/2601610-64.png?modified=4df85648)
#1, IP Location Lookup
![IP Location Lookup](https://addons.mozilla.org/user-media/addon_icons/2601/2601610-64.png?modified=4df85648)
![DNS lookup - HTTP status](https://addons.mozilla.org/user-media/addon_icons/984/984769-64.png?modified=212d8006)
#2, DNS lookup - HTTP status
![DNS lookup - HTTP status](https://addons.mozilla.org/user-media/addon_icons/984/984769-64.png?modified=212d8006)
![Image Lookup](https://addons.mozilla.org/static-server/img/addon-icons/default-64.d144b50f2bb8.png)
#3, Image Lookup
![Image Lookup](https://addons.mozilla.org/static-server/img/addon-icons/default-64.d144b50f2bb8.png)
![macOS Dictionary Lookup](https://addons.mozilla.org/user-media/addon_icons/893/893680-64.png?modified=753dc362)
#4, macOS Dictionary Lookup
![macOS Dictionary Lookup](https://addons.mozilla.org/user-media/addon_icons/893/893680-64.png?modified=753dc362)
![TheFreeDictionary.com Lookup](https://addons.mozilla.org/user-media/addon_icons/347/347817-64.png?modified=cfd80e07)
#5, TheFreeDictionary.com Lookup
![TheFreeDictionary.com Lookup](https://addons.mozilla.org/user-media/addon_icons/347/347817-64.png?modified=cfd80e07)
![Jisho Lookup](https://addons.mozilla.org/user-media/addon_icons/2633/2633217-64.png?modified=98407f03)
#6, Jisho Lookup
![Jisho Lookup](https://addons.mozilla.org/user-media/addon_icons/2633/2633217-64.png?modified=98407f03)
![Wikipedia lookup](https://addons.mozilla.org/user-media/addon_icons/2655/2655207-64.png?modified=7fe06ef4)
#7, Wikipedia lookup
![Wikipedia lookup](https://addons.mozilla.org/user-media/addon_icons/2655/2655207-64.png?modified=7fe06ef4)
![Easy DNS lookup](https://addons.mozilla.org/user-media/addon_icons/2787/2787305-64.png?modified=6ac942e1)
#8, Easy DNS lookup
![Easy DNS lookup](https://addons.mozilla.org/user-media/addon_icons/2787/2787305-64.png?modified=6ac942e1)
![IP Lookup](https://addons.mozilla.org/user-media/addon_icons/725/725233-64.png?modified=1636112519)
#9, IP Lookup
![IP Lookup](https://addons.mozilla.org/user-media/addon_icons/725/725233-64.png?modified=1636112519)
![NsLookup — Find DNS Records](https://addons.mozilla.org/user-media/addon_icons/2661/2661910-64.png?modified=2f9f870f)
#10, NsLookup — Find DNS Records
![NsLookup — Find DNS Records](https://addons.mozilla.org/user-media/addon_icons/2661/2661910-64.png?modified=2f9f870f)
![Reverse Phone Lookup](https://addons.mozilla.org/user-media/addon_icons/992/992433-64.png?modified=5ddd6cfe)
#11, Reverse Phone Lookup
![Reverse Phone Lookup](https://addons.mozilla.org/user-media/addon_icons/992/992433-64.png?modified=5ddd6cfe)
![Flagfox](https://addons.mozilla.org/user-media/addon_icons/5/5791-64.png?modified=mcrushed)
#12, Flagfox
![Flagfox](https://addons.mozilla.org/user-media/addon_icons/5/5791-64.png?modified=mcrushed)
![SiteStacks for Firefox - Instant Tech Lookup](https://addons.mozilla.org/user-media/addon_icons/858/858850-64.png?modified=1513664366)
#13, SiteStacks for Firefox - Instant Tech Lookup
![SiteStacks for Firefox - Instant Tech Lookup](https://addons.mozilla.org/user-media/addon_icons/858/858850-64.png?modified=1513664366)
![In Page Lookup](https://addons.mozilla.org/user-media/addon_icons/995/995008-64.png?modified=e000c741)
#14, In Page Lookup
![In Page Lookup](https://addons.mozilla.org/user-media/addon_icons/995/995008-64.png?modified=e000c741)
![Quick Jisho Lookup](https://addons.mozilla.org/user-media/addon_icons/2607/2607984-64.png?modified=54b0b2a6)
#15, Quick Jisho Lookup
![Quick Jisho Lookup](https://addons.mozilla.org/user-media/addon_icons/2607/2607984-64.png?modified=54b0b2a6)
![Language Lookup!](https://addons.mozilla.org/user-media/addon_icons/857/857774-64.png?modified=753dc362)
#16, Language Lookup!
![Language Lookup!](https://addons.mozilla.org/user-media/addon_icons/857/857774-64.png?modified=753dc362)
![PonsLookUp](https://addons.mozilla.org/user-media/addon_icons/917/917741-64.png?modified=1605296644)
#17, PonsLookUp
![PonsLookUp](https://addons.mozilla.org/user-media/addon_icons/917/917741-64.png?modified=1605296644)
![Adict - Instant Dictionary Lookup](https://addons.mozilla.org/user-media/addon_icons/999/999146-64.png?modified=6daf4dd9)
#18, Adict - Instant Dictionary Lookup
![Adict - Instant Dictionary Lookup](https://addons.mozilla.org/user-media/addon_icons/999/999146-64.png?modified=6daf4dd9)
![Domain Name Registration Data Lookup (WHOIS)](https://addons.mozilla.org/user-media/addon_icons/2614/2614523-64.png?modified=2de815d4)
#19, Domain Name Registration Data Lookup (WHOIS)
![Domain Name Registration Data Lookup (WHOIS)](https://addons.mozilla.org/user-media/addon_icons/2614/2614523-64.png?modified=2de815d4)
![Spotify Guitar Tab Lookup](https://addons.mozilla.org/user-media/addon_icons/2642/2642602-64.png?modified=f4b28b3b)
#20, Spotify Guitar Tab Lookup
![Spotify Guitar Tab Lookup](https://addons.mozilla.org/user-media/addon_icons/2642/2642602-64.png?modified=f4b28b3b)
![Hamradio lookups](https://addons.mozilla.org/user-media/addon_icons/2688/2688467-64.png?modified=155a4d61)
#21, Hamradio lookups
![Hamradio lookups](https://addons.mozilla.org/user-media/addon_icons/2688/2688467-64.png?modified=155a4d61)
![Address Auto-Complete](https://addons.mozilla.org/user-media/addon_icons/955/955953-64.png?modified=79ad8f6e)
#22, Address Auto-Complete
![Address Auto-Complete](https://addons.mozilla.org/user-media/addon_icons/955/955953-64.png?modified=79ad8f6e)
![Railduino Zeroconf Lookup](https://addons.mozilla.org/static-server/img/addon-icons/default-64.d144b50f2bb8.png)
#23, Railduino Zeroconf Lookup
![Railduino Zeroconf Lookup](https://addons.mozilla.org/static-server/img/addon-icons/default-64.d144b50f2bb8.png)
![Email Lookup Assistant](https://addons.mozilla.org/user-media/addon_icons/2834/2834615-64.png?modified=963869c8)
#24, Email Lookup Assistant
![Email Lookup Assistant](https://addons.mozilla.org/user-media/addon_icons/2834/2834615-64.png?modified=963869c8)
![Fast Wiktionary Lookup](https://addons.mozilla.org/static-server/img/addon-icons/default-64.d144b50f2bb8.png)
#25, Fast Wiktionary Lookup
![Fast Wiktionary Lookup](https://addons.mozilla.org/static-server/img/addon-icons/default-64.d144b50f2bb8.png)