- Vue.js devtools- DevTools extension for debugging Vue.js applications. - 62,674 个用户
- User Agent Switcher- 修改浏览器的 User-Agent 字符串 - 62,037 个用户
- Allow Right-Click- Re-enable the possibility to use the context menu on sites that overrides it - 50,617 个用户
- Cookie Quick Manager- An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported. - 48,247 个用户
- Redux DevTools- DevTools for Redux with actions history, undo and replay. - 43,930 个用户
- Assinatura Digital no Navegador- Realize Assinaturas Digitais no navegador. - 39,875 个用户
- Nimbus Screen Capture: Screenshot, Edit, Annotate- ★ Used by Several Million users on different platforms ★ 1) Screen capture web pages 2) Selected regions 3) Whole browser window 4) Slack upload Edit screenshots. Save images as local files or Google Drive. Tools for Annotation. Upload and share - 35,666 个用户
- Selenium IDE- Selenium IDE is an integrated development environment for Selenium tests. It is implemented as a Firefox extension, and allows you to record, edit, and debug tests. - 34,711 个用户
- WhatFont- A wrapper for Chengyin Liu's WhatFont tool - 32,831 个用户
- Disable JavaScript- Adds the ability to disable JavaScript for specific sites or specific tabs. You can customize the default JS state (on or off), the disable behavior (by domain or by tab) and much more. - 32,387 个用户
- cookies.txt- Exports all cookies to a Netscape HTTP Cookie File, as used by curl, wget, and youtube-dl, among others. - 30,708 个用户
- JavaScript-Java Bridge- A replacement for the Java Plugin so Java Applets without graphics continue to work on browsers that no longer support NPAPI plugins. Java's LiveConnect API is emulated — data & method calls can be exchanged, and Java can manipulate the webpage DOM. - 28,666 个用户
- Stylish - Custom themes for any website- 给页面和用户界面来个新形象 - 24,028 个用户
- Disable WebRTC- WebRTC leaks your actual IP addresses from behind your VPN, by default. - 23,356 个用户
- WAVE Accessibility Extension- Evaluate web accessibility within the Firefox browser. When activated, the WAVE extension injects icons and indicators into your page to give feedback about accessibility and to facilitate manual evaluation. - 22,461 个用户
- CORS Everywhere- A firefox addon allowing the user to enable CORS everywhere by altering http responses. Report issues to the repository, with enough information to reproduce the problem: https://github.com/spenibus/cors-everywhere-firefox-addon/issues - 21,663 个用户
- SAML-tracer- A tool for viewing SAML and WS-Federation messages sent through the browser during single sign-on and single logout. - 20,202 个用户
- Colorpick Eyedropper- A simple eye-dropper & color-picker tool allowing you to select color values from webpages. You will need to enable the add-on bar Firefox menu->Options->Add-on Bar OR View->Toolbars->Add-on Bar Then refresh the page. - 19,743 个用户
- Font Finder (revived)- An easy-to-use font inspector to get CSS styles of the selected element - 18,648 个用户
- 图片助手(ImageAssistant) 图片批量下载器- 一款用于嗅探、分析网页图片并提供批量下载等功能及在线收藏、检索、分享服务的浏览器扩展程序。 - 18,579 个用户
- Media Converter and Muxer - Audio Tools- Easy to use video and audio converter and muxer written in WebExtension built on top of the well-known FFmpeg converter - 18,237 个用户
- Proxy SwitchyOmega- 轻松快捷地管理和切换多个代理设置。 - 18,176 个用户
- JSONView- 在浏览器中查看JSON 文件. - 17,983 个用户
- User-Agent Switcher- Quickly and easily switch between popular user-agent strings. - 16,708 个用户
- Поиск Яндекс- Добавляет Яндекс к поисковым движкам. - 15,619 个用户
























