Firefox add-on with keyword - lookup

Free IP Geolocation API and IP Location Lookup

Utility to do DNS lookups directly to DNS APIs and display the response in the addon.

Analyze domain dns zone and http status.

Reverse image search with Google, TinEye, and Karma Decay

Select words and look them up in macOS’s Dictionary application.

This extension adds a context menu to enable lookup of selected word on www.thefreedictionary.com. You simply double any word on a page and right click to access a simple link that opens up a new tab that pulls up the definition of that word.

Quickly lookup the highlighted text on Wikipedia

An option to look up a selected word on a Japanese-English dictionary called Jisho from right-clicking it.

A simple and powerful tool for querying DNS records.

It uses a database of IP addresses, provided from geoip.nekudo.com, that are associated to cities and to other informations

Get details about a phone number by simply highlighting, right clicking, and choosing a site to look the number up on.

Adds context menu option and toolbar button for quick, in-place jisho.org lookup.

Username Lookup: Swiftly gather insights on usernames. Access a curated list of platforms for detailed OSINT research. Streamline your investigations

Email Lookup Assistant: Quickly access email lookup websites. Simplify OSINT investigations with easy information gathering. Enhance your research

SiteStacks lets you instantly look up the technology stack behind any website

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

Instantly access phone number lookup sites. Effortlessly gather information for OSINT investigations. Streamline your research

Highlight a word & press some keys and a Wiki article will present itself before your eyes for your reading pleasure. Press some other keys and gone will be the article so you can continue on your browsing journey knowing just a bit more on a topic.

Double click any word to look it up on Wiktionary in a panel without switching tabs. Customize which languages and sections you want to see. Works on Android.

Highlight a word or phrase, right click it, then choose its language to look up its definition in that language! By default it's catered to my own personal preferences, so let me know if you like it and I'll add extra features to help you!

Adds a context menu item to search for a selected word in the PONS online dictionary. Clicking the menu item opens a new tab with the search results on pons.com. Languages can be changed on the Add-on's settings page.

This extension allows you to easily look up a phrase in English, Polish and others holding ALT and double clicking. You can choose one of the four available dictionaries: dictionary.com (EN), merriam-webster.com (EN), diki.pl (EN/PL) and bab.la.

Find tabs to a song with one click

This tool gives you the ability to look up the registration data for domain names

QRZ Ham Radio lookups. Search callsigns on hamradio websites.