644 apps in experimental

Cisco Webex Extension

Join Webex meetings using Firefox ™

Dark Reader

Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.

GNOME Shell integration

This extension provides integration with GNOME Shell and the corresponding extensions repository

Privacy Possum

Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.


Violentmonkey provides userscripts support for browsers.
It's open source!

Tabliss - New Tab

A beautiful New Tab page with many customisable backgrounds and widgets that does not require any permissions.

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.

Plasma Integration

Multitask efficiently by controlling browser functions from the Plasma desktop.

Adblock for Youtube™

Popular Adblock for Youtube™ Extension: Removes the video ads from Youtube™. Thanks to all AdBlock supporters!

Impulse Blocker

Block distracting websites. Just list the sites you want Impulse Blocker to pause or completely avoid.

Forest: stay focused, be present

Stay focused in a pleasant way.

Open Multiple URLs

Opens a list of URLs

Lean Library

The Lean Library extension is a free tool which assists your library in delivering their services directly into your research workflow in more ways than one!

Header Editor

Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests

Toggl Track: Productivity & Time Tracker

Puts a timer into any web tool and allows quick real time productivity tracking with all the data stored on your Toggl Track account. Time tracking has never been easier!

HTTP Header Live

Displays the HTTP header. Edit it and send it.


add javascript that will run on this domain.

back up your scripts in the options area (shortcut there by clicking the "JS" letters in the bottom right)

Multithreaded Download Manager

Download manager with multithreading support.

Session Sync

Save sessions as bookmarks and access them across devices.
Advanced Session Manager: edit, save, change, restore.
It can also be your best Bookmark Manager

In My Pocket

Here is an unofficial addon for the Pocket service, whose goal is to bring some Pocket superpowers back to your browser. If you loved the old Pocket addon, you should love InMyPocket!

Happy Right-Click

Enable Right-Click.

Form History Control

Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller.

Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.

DeepL / MultiTranslate

This extension translates marked text with DeepL, Google Translate or Microsoft Translate.

Ant Download Manager

antFF is Ant Download Manager software integration module for Windows platforms.
For everyone who thinks that we are the same as is Ant Video Downloader - we are not Ant Video Downloader, we are another software, we are another group of developers.

Save Image to Pinterest on Right Click

Save any pictures to your Pinterest account with just a right click on the image.

SCDL SoundCloud Downloader

SoundCloud Download Helper. Adds ARTWORK, ARTIST, GENRE, TRACKNAME !!
FIXED!! 04.12.2019

Markdown Here

Write your email in Markdown, then make it pretty.

Backit plugin

Get cashback on every purchase in AliExpress, Gearbest, ASOS and other popular stores with the backit plugin

Behind The Overlay Revival

Click to close any overlay popup on any website.


A simple yet powerful CSS property viewer. For Firefox Quantum