Web development

by fctw

70 Add-ons in this Collection

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,454 reviews

2,288,759 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.

Flashblock by Philip Chee

Rated 4 out of 5 stars 1,116 reviews

883,590 users

Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 234 reviews

425,683 users

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

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 326 reviews

354,948 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.

Tab Mix Plus by onemen, Gary Reyes

Rated 4 out of 5 stars 2,474 reviews

1,031,786 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.

Flagfox by Dave G

Rated 5 out of 5 stars 620 reviews

742,632 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...

Tamper Data by Adam Judson

Rated 4 out of 5 stars 126 reviews

128,035 users

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 152 reviews

193,318 users

View HTTP headers of a page and while browsing.

Toolbar Buttons by Michael B.

Rated 4 out of 5 stars 317 reviews

140,615 users

Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.

YSlow by YSlow

Rated 3 out of 5 stars 176 reviews

127,872 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.

HackBar by Johan Adriaans, Pedro Laguna

Rated 5 out of 5 stars 39 reviews

33,419 users

Simple security audit / Penetration test tool.

URL Fixer by Wladimir Palant

Rated 4 out of 5 stars 98 reviews

24,566 users

URL Fixer fixes common typos in URLs entered in the address bar. It will fix errors like "google.con" or "youtube,com". You have the option of being asked to confirm corrections before they are applied.

RefControl by James Abbatiello

Rated 4 out of 5 stars 175 reviews

84,073 users

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

BugMeNot by retailmenot

Rated 4 out of 5 stars 218 reviews

47,358 users

Bypass compulsory web registration with the context menu via www.bugmenot.com.

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 48 reviews

179,815 users

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.
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