The top 25 most used Firefox add-on in Search Tools category

Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.

A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.

Removes the annoying link-conversion at Google Search / maps / ...

View archived and cached versions of web pages on various search engines, such as the Wayback Machine and Archive․is.

Click on any image on the web to search for it on TinEye. Recommended by Firefox! Discover where an image came from, see how it is being used, check if modified versions exist or locate high resolution versions. Made with love by the TinEye team.

View definitions easily as you browse the web. Double-click any word to view its definition in a small pop-up bubble. It also supports Spanish, German, French language alongside English. Enjoy Reading Uninterrupted!!!.

A customizable reverse image search tool that conveniently presents a variety of top image search engines.

It permits just with a single click to copy an emoji. There is a search-box and the "Most used emojis" section (the first one). If you want to send feedback or report bug, please contact me: https://www.emojiaddon.com/help

Copy Plain Text without any formatting

Scroll page without touching scroll-bar! Press Middle (Right / Left) mouse button anywhere on the page to scroll just like with scrollbar. Features also: - "grab and drag" scrolling - customizable scrollbars! - the Momentum auto-scroll

Swiftly access your search engines in a popup panel when you select text in a webpage. Context menu also included!

Tabby helps you manage a lot of windows and tabs easily; it can help you open, close, move, pin, and do many other things on tabs and windows quickly. With Tabby, you can even save all you windows and tabs for later with just one click!

Bring the power of a GIF search engine anywhere on the web. Respond to emails, tweets and more with GIFs quickly and easily. Add GIPHY GIFs to your Gmail, Facebook, Twitter and more. Just search, drag and drop or right click!

The most popular ad blocker for Chrome and Safari, now available for Firefox! Block all advertisements on all web pages, even Facebook, Youtube, and Hulu. Browse faster, too! Most ads aren't even downloaded at all, saving you time and bandwidth.

Automatically find and try coupon codes with 1-click. Works at thousands of stores in the US, Canada, Australia, India and the UK.

This extension adds Ecosia.org as the default search engine to your browser — it’s completely free!

This extension protects users from being tracked while allowing them to search the web in complete private mode.

Identify technologies on websites

Lookup scholarly articles as you browse the web.

Qwant extension sets qwant.com as your default search engine and blocks trackers for you.

The Citavi Picker is an extension for Citavi software users (www.citavi.com). The Citavi Picker lets you easily import online information.

Get free text of research papers as you browse, using Unpaywall's index of ten million legal, open-access articles.

Add the Manuals Hunt and Search extension to access over 60,000 manuals by clicking the favicon on the toolbar, and get web results from Yahoo® Search

Get a custom search tool powered by Yahoo!

Add Earth View 360° & Custom Web Search to access High Resolution 3D Maps & Yahoo Web Search