Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Random Agent Spoofer No Restart
Rotates complete browser profiles ( from real browsers / devices ) at a user defined time interval. It includes many extra privacy enhancing options
Simple security audit / Penetration test tool.
IE Tab + is an enhanced version of IE Tab. It supports FF 3.5 or greater, integrates IE Tab with Adblock Plus in the IE Tab engine, and synchronizes cookies between IE and Firefox. You can easily import settings from the original IE Tab into IE Tab +
A tool for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.
Autofill Forms enables you to fill out web forms with one click.
colorPicker No Restart
A very simple extension for learning web page colors. Copy the RGB or Hex color code of any pixel displayed in your browser to the clipboard (in CSS/HTML format). Similar in function to Internet Explorer's color picker.
Seoquake is a Firefox SEO extension aimed primarily at helping web masters who deal with search engine optimization (SEO), social media optimization (SMO) and internet promotion. Seoquake allows to investigate many important SEO parameters.
Java Console Extension for Java SE 1.5.0_12 (version 5 update 12).
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.
Adds zoom and rotation functionality for images...
This plugin is my attempt to bring the wonderful world of inspections, tips, hints, fixes and refactoring to Selenese! The Selenium Expert goes through your selenium test cases suggesting improvements, giving tips and even lets you apply them.
Control what gets sent as the HTTP Referer on a per-site basis.
Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.
Wappalyzer No Restart
Wappalyzer is a browser extension that identifies software on websites.
Disable WebRTC No Restart
WebRTC exposes your internal network IP(s), without user interaction.
Firefox OS 1.1 Simulator No Restart
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.
Auto Refresh will refresh or hard refresh any tab or group of tabs at individual or group intervals.
You can also customize your presets and save the ones you most use.
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.
Lightshot (screenshot tool) No Restart
Easy and convenient screenshot tool. Allows you to make screenshots of any selected area (video and flash too), edit and upload it to server.