by imoz

19 Add-ons in this Collection

Adblock Plus by Eyeo

Rated 5 out of 5 stars 7,057 reviews

12,855,515 users

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Video DownloadHelper by mig

Rated 4 out of 5 stars 11,469 reviews

3,502,886 users

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

NoScript Security Suite by Giorgio Maone

Rated 4 out of 5 stars 2,578 reviews

1,495,631 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, "Spectre", "Meltdown" and other JavaScript exploits.
Fx52? https://noscript.net/getit

Greasemonkey by Anthony Lieuallen

Rated 4 out of 5 stars 1,549 reviews

695,296 users

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

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,594 reviews

913,001 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 2,685 reviews

709,572 users

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

Web Developer by chrispederick

Rated 4 out of 5 stars 465 reviews

270,406 users

The Web Developer extension adds various web developer tools to the browser.

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 422 reviews

178,092 users

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

SQLite Manager by lazierthanthou

Rated 4 out of 5 stars 289 reviews

112,553 users

Manage any SQLite database on your computer.

Nightly Tester Tools by Automation Development, Tony Mechelynck, others

Nightly Tester Tools (NTT) is an add-on for aiding testers of Nightly builds of Mozilla apps including Firefox.

Secure Login by Sebastian Tschan, Sarah Av.

Rated 4 out of 5 stars 375 reviews

21,349 users

Secure Login is an extension for Firefox integrated password manager.

WebExtension alternative: https://addons.mozilla.org/firefox/addon/keepasshelper/

FirePHP by cadorn

Rated 4 out of 5 stars 58 reviews

14,980 users

Log from PHP to a devtools panel.

Certificate Patrol by Carlo v. Loesch, tg(x), others

Rated 4 out of 5 stars 68 reviews

3,931 users

Your browser trusts many certification authorities and intermediate sub-authorities quietly, every time you enter an HTTPS web site. This add-on reveals when certificates are updated, so you can ensure it was a legitimate change.

CustomizeGoogle by CustomizeGoogle

Download Now


Rated 4 out of 5 stars 370 reviews

1,360 users

CustomizeGoogle enhances Google by adding information and removing unwanted information.
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