Add extensions, get work done

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.

Redux DevTools

DevTools for Redux with actions history, undo and replay.

Allow Right-Click

Re-enable the possibility to use the context menu on sites that overrides it

★ 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

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.

WhatFont

A wrapper for Chengyin Liu's WhatFont tool

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.

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.

Manage and switch between multiple proxies quickly & easily.

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.

WebRTC leaks your actual IP addresses from behind your VPN, by default.

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

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.

SAML-tracer

A tool for viewing SAML and WS-Federation messages sent through the browser during single sign-on and single logout.

cookies.txt

Exports all cookies to a Netscape HTTP Cookie File, as used by curl, wget, and youtube-dl, among others.

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.

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

JSONView

View JSON documents in the browser.

Font Finder (revived)

An easy-to-use font inspector to get CSS styles of the selected element

User-Agent Switcher

Quickly and easily switch between popular user-agent strings.

An image extractor for sniffing, analyzing and batch downloading images from web page.

SeoQuake SEO extension

Accelerate your SEO efforts on the fly. SEOquake is a free plugin for browsers that provides you with key SEO metrics for a specific page, along with other useful tools such as SEO Audit and many others.

My IP Hider VPN is number one tool for hiding your IP and unblocking any web site! If your Firefox version is less then 55 please install older My IP Hider VPN from "Version History" (https://goo.gl/7ZQQjZ)

Google Lighthouse

Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.