593 apps in performance

AdBlocker Ultimate

Completely remove ALL ads. No “acceptable” ads or whitelisted advertisers allowed. This free extensions also helps block trackers and malware.

Cisco Webex Extension

Join Webex meetings using Firefox ™

AdGuard AdBlocker

Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.

NoScript Security Suite

The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.

I don't care about cookies

Get rid of cookie warnings from almost all websites!

YouTube High Definition

YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.

600% Sound Volume

Up to 600% volume boost

Simple Tab Groups

Create, modify, and quickly change tab groups

Popup Blocker (strict)

Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address

Tab Auto Refresh

Automatically refresh tabs based on custom time intervals

YouTube mp3 Downloader

(New Version, please update, becomes The YouTube mp3 Downloader converts YouTube video to mp3. Premium Audio Quality 320kbps. Audio Trimmer. Album Art. YTMP3 Converter. Variable Bitrate. Volume Control. High Download Speed.

Mate Translate – translator, dictionary

Your all-in-one translator for web pages, highlighted text & Netflix subtitles. Translate and learn words in 103 languages.

Open in PDF Reader

Adds a context menu item to send PDF links directly to a PDF viewer like Adobe Acrobat Reader

View Image

Re-implements the google image, "View Image" and "Search by Image" buttons.

YouTube mp3 Downloader

The YouTube mp3 Downloader Add-on includes a Button on any YouTube Page and allows you to convert the YouTube Video to a mp3 with just one click. Compatible with new FireFox Quantum 57+

Video Downloader Prime

Easily download most popular video formats.

Runet Censorship Bypass

This extension allows bypassing censorship of Russian government (i.e. only sites blocked by RosKomNadzor, RKN), giving you access
to libraries, encyclopedias, oppositional political sites, and to
innocent sites blocked to many reasons.

Wayback Machine

Welcome to the Official Internet Archive Wayback Machine Browser Extension! Go back in time to see how a website has changed through the history of the Web. Save websites, view missing 404 Not Found pages, or read archived books & papers.


This extension automatically changes HTTP web addresses to the secure HTTPS, whenever possible.

JavaScript Toggle On and Off (WebExtension)

Toggle JavaScript engine on and off the easy way

Allow CORS: Access-Control-Allow-Origin

Easily add (Access-Control-Allow-Origin: *) rule to the response header.

Empty Cache Button

Cache clearing made easy. One click.

Open in PDF Viewer

Easily open desired links in PDF viewer

Audio Downloader Prime

Easily download most popular audio formats.


Blocks cryptocurrency miners all over the web.

Behind The Overlay

One click to close any overlay popup on any website.

Use keyboard shortcut Cmd+Shift+X (Mac OS X) or Ctrl+Shift+X (Windows / Linux).

YouTube™ to MP3

Convert & download YouTube videos to MP3 with just one click!

Block Site

Easily block websites of your choice!

DeepL / MultiTranslate

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

Country Flag +

Shows country flag based on the server location of the active tab's url