Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
AdBlocker Ultimate
Free and improved ad blocker. Completely remove ALL ads. No "acceptable" ads or whitelisted advertisers, block tracking, block malware!
393,813 users
User-Agent Switcher and Manager
Spoofs User-Agent strings of your browser with a new one globally, randomly or per hostname
13,851 users
Midnight Lizard
This extension changes page colors, brightness and contrast to increase readability and brings dark night mode to all websites.
3,422 users
Iridium for YouTube
YouTube with more freedom
16,976 users
Classic Theme Restorer (Fx29-56)
Squared tabs, application menu, add-on bar, small button view and many more 'old' features for 'Firefox 29-56', not for Firefox 57+! >Latest builds on Github!<
199,540 users
Tab Groups
Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch to a specific one.
54,120 users
OmniSidebar
Bring your bookmarks into view with just a gesture. Move the sidebar across the screen. Open a different sidebar by just clicking its title. And more! Keeps your sidebar simple and quick to access!
24,725 users
Flappy Bird New Tab
Play game Flappy Bird when you open a new tab. Try to fly the bird as far as you can without hitting a pipe!
1,395 users
YouTube Video Downloader
Download any video from YouTube to your favorite format.
1,063 users
YouTube Download Helper
2018 updated downlaod helper for YouTube. Download any video from YouTube to MP3, MP4, WEBM, M4A or 3GP. Subtitles and thumbnails also available for download with a single mouse click!
16,315 users
Amadello
Amadello - Shoppinghelfer. Du hast ein cooles Produkt gefunden, würdest es aber am liebsten direkt bei Ebay oder Amazon kaufen oder erst Preise vergleichen bei IDEALO? Kein Problem Amadello hilft dir mit nur einem Klick.
2,017 users
YouTube to MP3
Download YouTube video as Mp3 right from YouTube with one click! On-page plugin to download from YouTube to Mp3! 1) Convert video from YouTube to Mp3. 2) Download Mp3.
10,995 users