Explore powerful tools and features to customize Firefox and make the browser all your own.
YouTube with more freedom
The most popular ad blocker for Chrome and Safari, now available for Firefox! Block all advertisements on all web pages, even Facebook, Youtube, and Hulu. Browse faster, too! Most ads aren't even downloaded at all, saving you time and bandwidth.
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.
Spoofs User-Agent strings of your browser with a new one globally, randomly or per hostname
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!<
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.
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!
Play game Flappy Bird when you open a new tab. Try to fly the bird as far as you can without hitting a pipe!
Download any video from YouTube to your favorite format.
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!
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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.