- Vue.js devtools- DevTools extension for debugging Vue.js applications. - 64 593 iseqdacen
- User-Agent Switcher- Easily override the browser's User-Agent string - 62 883 iseqdacen
- Allow Right-Click- Re-enable the possibility to use the context menu on sites that overrides it - 51 204 iseqdacen
- 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. - 49 069 iseqdacen
- Redux DevTools- DevTools for Redux with actions history, undo and replay. - 45 265 iseqdacen
- Assinatura Digital no Navegador- Realize Assinaturas Digitais no navegador. - 43 546 iseqdacen
- 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 - 36 521 iseqdacen
- 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. - 35 981 iseqdacen
- WhatFont- A wrapper for Chengyin Liu's WhatFont tool - 33 688 iseqdacen
- 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. - 32 926 iseqdacen
- cookies.txt- Exports all cookies to a Netscape HTTP Cookie File, as used by curl, wget, and youtube-dl, among others. - 31 047 iseqdacen
- 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. - 29 600 iseqdacen
- Stylish - Custom themes for any website- Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites. - 24 322 iseqdacen
- Disable WebRTC- WebRTC leaks your actual IP addresses from behind your VPN, by default. - 23 518 iseqdacen
- 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. - 23 449 iseqdacen
- 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 - 22 378 iseqdacen
- SAML-tracer- A tool for viewing SAML and WS-Federation messages sent through the browser during single sign-on and single logout. - 21 182 iseqdacen
- 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. - 20 152 iseqdacen
- Font Finder (revived)- An easy-to-use font inspector to get CSS styles of the selected element - 19 075 iseqdacen
- ImageAssistant Batch Image Downloader- An image extractor for sniffing, analyzing and batch downloading images from web page. - 18 912 iseqdacen
- Proxy SwitchyOmega- Manage and switch between multiple proxies quickly & easily. - 18 651 iseqdacen
- 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 - 18 459 iseqdacen
- JSONView- View JSON documents in the browser. - 18 421 iseqdacen
- User-Agent Switcher- Quickly and easily switch between popular user-agent strings. - 17 031 iseqdacen
- Xdebug Helper for Firefox- This extension is very useful for PHP developers that are using PHP tools with Xdebug support like PHPStorm, Eclipse with PDT, Netbeans and MacGDBp or any other Xdebug compatible profiling tool like KCacheGrind, WinCacheGrind or Webgrind. - 16 115 iseqdacen
























