SeaMonkey

by Zulkarnain K.

45 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,856 reviews

20,083,310 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).

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 1,794 reviews

1,240,641 users

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

Ghostery by Ghostery

Rated 5 out of 5 stars 1,291 reviews

1,396,637 users

Increase your browsing privacy, protection, and speed.

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,576 reviews

2,100,569 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.

Stylish by Jason Barnabe

Rated 4 out of 5 stars 829 reviews

455,666 users

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Tumblr, and many, many other sites. You can even customize Firefox and other programs themselves.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 263 reviews

323,627 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Web Developer by chrispederick

Rated 5 out of 5 stars 246 reviews

461,940 users

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

SQLite Manager by lazierthanthou

Rated 5 out of 5 stars 56 reviews

193,422 users

Manage any SQLite database on your computer.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 309 reviews

256,409 users

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

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 170 reviews

142,393 users

View HTTP headers of a page and while browsing.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 168 reviews

84,037 users

An HTTP analyzer addon for Firefox

QuickNote by Leszek Życzkowski, Jed Brown, others

Rated 5 out of 5 stars 174 reviews

27,368 users

A simple note-taking extension.

Image Zoom by Jason Adams

Rated 4 out of 5 stars 343 reviews

141,651 users

Adds zoom and rotation functionality for images...

JavaScript Deobfuscator by Wladimir Palant

Rated 5 out of 5 stars 20 reviews

50,433 users

This add-on shows you what JavaScript code runs on a web page, even if it is obfuscated and generated on the fly. Simply open JavaScript Deobfuscator from the Web Developer menu and watch the scripts being compiled/executed.

Add-ons Manager Context Menu by Zulkarnain K.

Rated 5 out of 5 stars 37 reviews

25,203 users

Add more items to Add-ons Manager context menu.
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