To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!Close
Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
- Any Firefox
- Firefox 46.0
- Firefox 45.0
- Firefox 44.0
- Firefox 42.0
- Firefox 26.0
- Firefox 18.0
- Firefox 17.0
- Firefox 4.0
- Firefox 3.6
36 matching results
NoScript Security Suite Featured
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.
Record, bookmark and replay your browser activities in a snap with DéjàClick. Designed for Firefox, DéjàClick can handle the most complex websites - including AJAX, Flash, forms and more. With a single click you can repeat your most common tasks.
A suite of tools for developers.
Shows all source files of a webpage.
Search engine for developers that searches for tutorials, as well as through README's and video training sites.
IP Whois Lookup & Website Reviews & Rating. Display country flag indicating website location. Alexa and Norton Antivirus Site Adviser. Supported: GoDaddy, NetworkSolutions, Dotster, 1and1, NameCheap, Register, Yahoo, 123-Reg, FatCow, Enom, FastHosts.
Web Developer Featured
The Web Developer extension adds various web developer tools to the browser.
immunity No Restart
View Source In Dreamweaver is a new companion for web developers to open up any web page HTML source with Adobe Dreamweaver via a single and quick mouse click.
Library Detector No Restart
Firebug command line autocomplete.
XPCOMViewer is tiny tool for exploring XPCOM components.
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
Good Website Inspector is an extended ruleset for YSLOW, a Firefox AddOn, to check source codes of HTML pages to get easy and fast hints to optimize the current page.
WatchPug is an extension checking your website documents for validation errors. Find more information at http://watchpug.com/.