The long tail Add-ons.

by morihiro

139 Add-ons in this Collection

uBlock Origin by Raymond Hill

Rated 5 out of 5 stars 2,192 reviews

3,681,621 users

Finally, an efficient blocker. Easy on CPU and memory.

Video DownloadHelper by mig

Rated 4 out of 5 stars 8,241 reviews

3,516,040 users

The easy way to download and convert Web videos from hundreds of YouTube-like sites.

Privacy Badger by EFF Technologists

Protects your privacy by blocking spying ads and invisible trackers.

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 1,159 reviews

864,202 users

Customize the way a web page displays or behaves, by using small bits of JavaScript.

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 1,806 reviews

919,989 users

The first and only download manager/accelerator built inside Firefox!

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,585 reviews

1,756,796 users

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

Easy Screenshot by MozillaOnline

Rated 4 out of 5 stars 162 reviews

2,288,951 users

Capture a screenshot of the whole webpage, and save in your desktop in default.

HTTPS Everywhere by EFF Technologists

Rated 4 out of 5 stars 225 reviews

354,053 users

Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.

Tab Mix Plus by onemen, Gary Reyes

Rated 4 out of 5 stars 2,421 reviews

561,741 users

Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 398 reviews

183,197 users

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

Tampermonkey by Jan Biniok

Rated 4 out of 5 stars 114 reviews

53,524 users

Tampermonkey is the world's most popular userscript manager.

Classic Theme Restorer by Aris

Rated 5 out of 5 stars 1,084 reviews

319,590 users

Squared tabs, appmenu, add-on bar, small button view and many more 'old' features for Firefox 29-56 (Windows / MacOSX / Linux).

Release builds
Beta builds

Flagfox by Dave G

Rated 5 out of 5 stars 671 reviews

330,683 users

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

To Google Translate by Juan Escobar

Rated 4 out of 5 stars 273 reviews

61,269 users

Right-click on a section of text and click on Translate icon next to it to translate or listen it to your language.

Decentraleyes by Thomas Rientjes

Rated 5 out of 5 stars 149 reviews

69,086 users

Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
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