New Tab Tools

Customizes the new tab page. Add more tiles. Have a background image. Set new tile images and titles. See recently closed tabs. And more...

Social Fixer

Social Fixer for Facebook fixes annoyances, adds features, and enhances existing functionality to make FB more fun and efficient. Filter the news feed, hide sponsored posts and political posts, hide parts of the page you don't want to see, and more!

UltraWideo

WhatRuns

Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.

SQLite Manager

manage, edit, manipulate, plot and save one or multiple SQLite databases simultaneously

Telegram Web

Flag Cookies

A cookie manager add-on on with power features! Differentiating domain.net and subdomain.domain.net with removal and keep rulesets.

SoundCloud Downloader

Directly download tracks on soundcloud.com. Creates metadata tags for Title, Artists, Album & Artwork. Allows to block reposts in your Stream feed and more.

Google Keep Notes

Google Keep Notes brings Google Keep right into your Firefox Sidebar.

Always on Top

Sets "Always on Top" style for your Firefox window

YouTube Search Engine

Adds YouTube search engine to search engines.

Instant Gaming

Browse the web for your favorite games and always know if they are available at Instant-Gaming.com !

Modify Header Value

Add, modify or remove a header for any request on desired domains.

Flash-HTML5 Player for YouTube™

Play YouTube™ Videos in Flash or HTML5 Player

Html Validator

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon For Firefox 56, use 0.974 (see all versions below). For Firefox 57, see Web Extensions.

Capture & Print

This add-on lets you print a webpage's area easily.

Add custom search engine

Add a custom search engine to the list of available search engines in the search bar and URL bar.

Pinned Google Calendar

Go to the pinned Google Calendar tab. If it doesn't exist, it's created.

Auto Fullscreen

Auto Fullscreen for Firefox Quantum

Disable HTML5 Autoplay

Disable autoplay and preloading of HTML5 video and audio players.

Simple mass downloader

A simple but powerful mass downloader. Download links from multiple tabs at once, from the clipboard or selected text on web pages. Advanced filtering or multi-renaming options. User-defined automatic download folders.

FetchV:Video Downloader(HLS/m3u8/mp4)

Download all kinds of videos online, includes HLS, m3u8, mp4, webm...

ReloadMatic: Automatic Tab Refresh

ReloadMatic automates the periodic reloading / refreshing of browser tabs. It offers cache control, custom intervals, POST support and many other features. It also integrates with browser features such as tab restore, pinning, and incognito mode.

Google Page Translate

Adds a toolbar button to open Google Page Translate for the current tab.

My IP Hider VPN

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)

Open Link with New Tab

Open the link in a new tab depending on the setting.

Download Facebook Video

Save video from any Facebook video in original .mp4 format. "1-Click" download any video directly from Facebook.com. Choose if you want video or just an image. Addon uses 3rd party site (www.1clickfb.com) for operation.

Bookmark Dupes

Display/Remove duplicate bookmarks, empty folders or descriptions

Weather Authority & Custom Web Search

Add the Weather Authority & Custom Web Search extension and get regular weather updates by clicking the favicon on the toolbar & enjoy access to custom Yahoo® search from your browser search bar.

RegretsReporter

The RegretsReporter browser extension, built by the nonprofit Mozilla, helps you take control of your YouTube recommendations.

Mozzarella

Free extensions for Firefox-based browsers

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