Firefox add-on with keyword - tool

With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.

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Easy and convenient screenshot tool. Allows you to make screenshots of any selected area (video and flash too), edit and upload it to server.

React Developer Tools is a tool that allows you to inspect a React tree, including the component hierarchy, props, state, and more. To get started, just open the Firefox devtools and switch to the "⚛️ Components" or "⚛️ Profiler" tab.

Ripple Tools provide help to people who are considering self harm

Foxy SEO Tool offers tools for search engine optimization (SEO), web traffic and page analysis for webmasters and web professionals.

Quick way to start Free Snipping Tool right from Mozilla

Customizes the new tab page. Add more tiles. Have a background image. Set new tile images and titles. See recently closed tabs. And more...

Places a Snipe button on eBay auction pages. When clicked, the item will be added to our website to be bid on in the final seconds.

A word counter that counts the number of words, characters without any extra clicks. Just select the text and right click to select the context menu to invoke the report. It gives detail report about the numbers words, characters, sentences...

FoxyProxy is an open-source, advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. No paid accounts are necessary; bring your own proxies or buy from any vendor. The original proxy tool, since 2006.

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

An integrating software that helps Amazon sellers find products, optimize keywords, do keyword&product research, spy on competitors, etc.

This feature of this extension is to pop up HTML5 video to a separate window (also supports Flash)

Automatically labels users as scammers if they are on the Universal Ban List while you browse

Extra features for Character.AI. Background, Font and Memory Manager, chat/character cloning, import/export characters, save chats and more!

A useful tool for web links. Features: Copy as plain text. Copy as HTML source. Copy Link Name & URLs. Copy Tab Name & URLs. Analyze image/page URLs.

The best privacy tool and ad blocker extension for Firefox. Stop trackers, speed up websites and block ads everywhere including YouTube and Facebook.

Website analysis & SEO tool by iwebchk provides comprehensive website review in SEO, performance, validity, security, accessibility, social media, backlinks, visitors, technologies and usability.

The SEO Tool Extension gives you quick access to many major SEO tools in one handy extension.

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

Quickly and easily capture an image of a web page. Options allow you to control output format (PNG or JPEG), file name and more.

Official Firefox port of the Zhongwen Chrome extension (http://github.com/cschiller/zhongwen). Translate Chinese characters by hovering over them with the mouse. Includes internal word list, links to Chinese Grammar Wiki, tone colors, and more.

React Context DevTool is a debugging tool for React Context and useReducer API.