Add-ons
To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseMost Popular All »
- 1. Adblock Plus 14,021,696 users
- 2. uBlock Origin 3,782,494 users
- 3. Video DownloadHelper 3,635,869 users
- 4. Easy Screenshot 2,416,614 users
- 5. NoScript Security Suite 1,765,623 users
- 6. Firebug 1,408,071 users
- 7. iMacros for Firefox 1,102,642 users
- 8. Ghostery 962,172 users
- 9. DownThemAll! 949,339 users
- 10. Cisco WebEx Extension 900,846 users
Featured Extensions See all »
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YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.385,755 users -
FireSSH is a free, cross-platform SSH terminal client for Mozilla Firefox. Written entirely in Javascript!22,796 users -
"Best Youtube Video Downloader", Only one with 1080p Full-HD and 256kbps MP3 Direct Links. A clean, fast and simple addon for superfast and easy downloads in FLV, 3GP, MP3, MP4, 720p, 1080p qualities on Youtube pages.221,081 users -
Here's a handy and powerful image saving tool for you to pick and save your favorite images in page! With thumbnail mapping, preference profiles, image filtering, and lots of flexible preferences & features!13,860 users -
Quickly and easily switch between popular user-agent strings.54,419 users
Up & Coming Extensions See all »
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Prevents your web browser from opening a new window on top of the content or web site you are viewing. The Addon also supresses unwanted advertisement windows on your screen. The one deciding what consitutes a popup is the user.6,546 users -
Save video from any Youtube video in High definition HD or Standard definition SD.
1-click download any video directly from Youtube.
Choose if you want .mp4, .webm, mobile, or audio only (audio only saves space and great for mobile devices)24,595 users -
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.getyourfb.com) for operation.6,257 users -
Click to download any Youtube, Instagram, Facebook, Vid.me, Streamable, LiveLeak, Vine video or photo.14,947 users -
This is a basic FireFox extension which simply scrolls the page down (and optionally up again) automatically at an adjustable rate.15,827 users -
Provides content authorisation as part of the Impero Education Pro software product.789 users
Featured Themes See all »
Featured Collections See all »
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Password Managers
Enjoy better security and more convenience with an excellent password manager.
5 add-ons · 150 followers -
Bookmark Managers
Customize and re-organize the way you manage your bookmarks.
8 add-ons · 31 followers
To create your own collections, you must have a Mozilla Add-ons account.
