Vue.js devtools
DevTools extension for debugging Vue.js applications.
66 939 käyttäjää
User-Agent Switcher
Easily override the browser's User-Agent string
64 489 käyttäjää
Allow Right-Click
Re-enable the possibility to use the context menu on sites that overrides it
54 059 käyttäjää
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.
50 310 käyttäjää
Redux DevTools
DevTools for Redux with actions history, undo and replay.
48 523 käyttäjää
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
36 736 käyttäjää
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.
36 623 käyttäjää
WhatFont
A wrapper for Chengyin Liu's WhatFont tool
36 576 käyttäjää
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.
34 181 käyttäjää
cookies.txt
Exports all cookies to a Netscape HTTP Cookie File, as used by curl, wget, and youtube-dl, among others.
33 529 käyttäjää
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.
30 394 käyttäjää
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.
26 501 käyttäjää
Disable WebRTC
WebRTC leaks your actual IP addresses from behind your VPN, by default.
24 609 käyttäjää
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.
24 178 käyttäjää
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
23 824 käyttäjää
Assinatura Digital no Navegador
Realize Assinaturas Digitais no navegador.
23 817 käyttäjää
SAML-tracer
A tool for viewing SAML and WS-Federation messages sent through the browser during single sign-on and single logout.
23 077 käyttäjää
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.
20 402 käyttäjää
Font Finder (revived)
An easy-to-use font inspector to get CSS styles of the selected element
20 254 käyttäjää
JSONView
View JSON documents in the browser.
19 215 käyttäjää
ImageAssistant Batch Image Downloader
An image extractor for sniffing, analyzing and batch downloading images from web page.
18 842 käyttäjää
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
18 520 käyttäjää
User-Agent Switcher
Quickly and easily switch between popular user-agent strings.
16 979 käyttäjää
Proxy SwitchyOmega
Manage and switch between multiple proxies quickly & easily.
16 803 käyttäjää
Google Lighthouse
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
16 599 käyttäjää