My Favorite Add-ons

by Zulkarnain K.

132 Add-ons in this Collection

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 168 reviews

161,983 users

View HTTP headers of a page and while browsing.

JSONView by Ben Hollis

Rated 5 out of 5 stars 153 reviews

118,947 users

View JSON documents in the browser.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 166 reviews

94,717 users

An HTTP analyzer addon for Firefox

JavaScript Deobfuscator by Wladimir Palant

Rated 5 out of 5 stars 20 reviews

57,363 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.

New Tab Tools by Geoff Lankow

Rated 4 out of 5 stars 198 reviews

46,321 users

Customizes the new tab page. Add more tiles. Add the launcher from Firefox start. Have a background image. Set new tile images and titles. See recently closed tabs. And more...

Download Manager Tweak by squashr1979, andman42

Rated 4 out of 5 stars 426 reviews

67,546 users

Allows the download manager to also open in a tab or sidebar, and adds some optional display changes.

Image Zoom by Jason Adams

Rated 4 out of 5 stars 338 reviews

154,842 users

Adds zoom and rotation functionality for images...

Pearl Crescent Page Saver screenshot tool by Kathleen Brade, Mark Smith

Rated 4 out of 5 stars 87 reviews

97,706 users

Save an image of a web page (including Flash content) to a file. Web page screenshots may be captured interactively or from the command line. Options allow you to control the output format (PNG or JPEG), image file name, scaling, and much more.

Private Tab by Infocatcher

Rated 5 out of 5 stars 214 reviews

73,687 users

Adds private tabs.

Saved Password Editor by Daniel Dawson

Rated 5 out of 5 stars 223 reviews

94,933 users

Adds the ability to create and edit entries in the password manager.

Html Validator by Marc Gueury

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Online HTML 5 validation, you need 0.962
http://users.skynet.be/mgueury/mozilla

QuickNote by Leszek Życzkowski, Jed Brown, others

Rated 5 out of 5 stars 172 reviews

28,252 users

A simple note-taking extension.

RefControl by James Abbatiello

Rated 4 out of 5 stars 184 reviews

82,640 users

Control what gets sent as the HTTP Referer on a per-site basis.

Firefox OS 1.1 Simulator by Myk Melez, J. Ryan Stinnett

Firefox OS Simulator is a test environment for Firefox OS. Use it to test your apps in a Firefox OS-like environment that looks and feels like a mobile phone. After installing it, go to Web Developer > Firefox OS Simulator to access its features.

Add to Search Bar by Dr. Evil

Rated 5 out of 5 stars 637 reviews

81,466 users

Make any pages' search functionality available in the Search Bar (or "search box")...
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