Ultrawidify
Aspect ratio fixer for Youtube. Allows improperly encoded videos to properly fit ultrawide and superwide displays (e.g. 21:9) — and it attempts to do so automatically.
5,699 users
Safe Browsing
With Safe Browsing Add-on you can stop search engines from tracking your searches and following you around the Internet. Terms of use https://www.myprivatesearch.com/terms?yid=saff Privacy Policy https://www.myprivatesearch.com/policy?yid=saff
5,142 users
1,110 users
Copy Link Button / Copy Frame or Page URL
Copy Link button for the main toolbar (or address bar). Use the right-click context menu to "Copy Framed Page URL". See the full description and screenshots for all the "how to."
274 users
Yandex Search
Adds Yandex for search engines
12,040 users
Spell checker and Grammar checker by Scribens
A powerful, free spelling and grammar checker. Scribens corrects over many types of grammar mistakes and detects repetitions, run-on sentences, redundancies, etc. Languages: English, French.
166 users
2,644 users
Simple Night Mode for Quantum
Works on Mobile as well. An addon to invert the color of any webpage, making contents of any website readable and less stressful on your eyes. After installing addon, just click toggle button on toolbar to switch on/off night mode.
140 users
275 users
Rivet
An integration for 5etools and Plutonium.
2,172 users
Stealthy
Does your country/organization block you from facebook, youtube or others? Is the service you want unavailable in your country? Stealthy is the solution for you. Unlike other extensions we do the work of look for fast proxies for you.
6,385 users
Server View
View server information.
141 users
VPN99 - fast secure VPN
Evading hackers, bypassing censorship, unblocking online TV, making secure payments & more is what VPN99 clients enjoy every day
130 users
Twitter Lume Reskin
Popular Dark Lume userstyle for Twitter, redone as a Mozilla Firefox Addon.
405 users
Re-Pagination - WebExtension fork
Load consecutive pages in a single tab at once, or view them in a slideshow, similar to AutoPager but not as automatic. Useful for searches, forums, and webcomics. This is a fork of Nils Maier's Re-Pagination addon, updated for Firefox Quantum.
716 users
Sidesy: Your Comments Sidebar For YouTube
Bring YouTube comments to the side. Dive into the comments without scrolling past the video.
246 users
Download Notifications
Native notification integration for completed downloads.
690 users
OpenOffice Writer online documents
Create and edit doc and docx documents with OpenOffice Writer online
507 users
Night Video Tuner
Protect your eyes and improve your sleeping cycles by adjusting video temperature and many other properties!
810 users
Containers Helper
Helps improve container management by providing container searching, deleting, modifying, duplicating, and default URLs on a per-container or bulk basis. Complements the multi-account containers addon.
589 users
SakuraCheckerPlus ( Amazon )
Amazon.co.jpの商品検索結果ページにマーケットプレイス業者を除き絞り込むボタンと商品掲載ページから選択したサイト(サクラチェッカー,Keepa)を新たなタブに表示するボタンを追加する。
4,128 users
Firescape Navigator
Show the Netscape Navigator or Internet Explorer loading animation in Firefox
265 users
TeaserFast
Расширение позволяет зарабатывать деньги за просмотр рекламы.
969 users
531 users
Tab Group Switch
Save tab groups and switch between them.
253 users