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Find tools to improve your workflow - right within Firefox.

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xStyle

Restyle the web with xStyle, a user styles manager. With xStyle you can install themes & skins for many sites and create your own.

SugarMelt

Allows you to change font/style; also adds cheats

HackBar For Quantum

HackBar Quantum is a sidebar that helps you with web application security testing. This add-on is a predecessor to the original HackBar that is not compatible with Firefox Quantum. This is still in beta phase, lots of things are yet to come :) .

a11y.css accessibility checker

a11y.css provides warnings about possible risks and mistakes that exist in HTML code through a style sheet. This extension also provides several accessibility-related utilities. see https://github.com/ffoodd/a11y.css/tree/webextension for details

Internet Connection Monitor

Monitor the internet connection and display status in the toolbar.

ng-inspect

Inspect the angular scope in the developper tools inspector

Socket.IO Test Client

A Simple Socketio Client Development Tool

OneDrive (Pin Tab)

Switch to OneDrive (Pin Tab) with a single click or a Hot Key (Alt+O)!

User-Agent Switcher PRO

Anonymize your browsing by easily switch/spoof/fake User-Agent with what you want. User-Agent selection mode: Manual, Auto, Random

SVG Export

Download SVGs from websites as SVGs, PNGs or JPEGs

JsonDiscovery

Browser extension that changes the way you're viewing JSON

A11Y - Color blindness empathy test

Empathy test for color blindness and visual impairment. This add-on emulates 8 types of color blindness, plus grayscale to check the contrast of your website. https://vinceumo.github.io/A11Y-Color-Blindness-Empathy-Test/

Public IP Display

Displays your IP address and country using lookup services of your choice. Auto-refreshes, notifies, and displays.

Knockoutjs context

Shows the knockout context & data for the selected dom node in a sidebar of the elements pane.

Plain Text Linker

Opens plain text URLs when you double-click on them.

Odoo Easy Debug

This extension changes to debug mode and vice-versa in Odoo ERP. Usage: - One click to activate and disable debug mode - Double click to activate and disable debug mode with assets ONLY FOR ODOO/OPENERP For more info see github.

The Stream Detector PLUS

Detects playlists and subtitles used by streams, incl. custom file extensions and headers. Assembles readymade commands for tools.

cors-plugin

A simple add-on/plugin to allow developers who might want to make cross origin requests to their APIs from localhost