Fire IE (FireIE, Enhanced IE) Requires Restart
Embeds Internet Explorer(IE) to use the powerful Firefox add-ons.
Not only an enhanced IE Tab, but also an enhanced Internet Explorer with Adblock Plus and FireGestures support.
Switch to the IE engine in one click and dismiss your IE.
MeasureIt Requires Restart
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
ColorfulTabs Requires Restart Featured
The first addon you should be installing on a fresh Firefox install. A must have. The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color.
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.
Proxy Switcher Featured
Access to the complete Firefox's proxy settings right from a toolbar panel
Autofill Forms Requires Restart
Autofill Forms enables you to fill out web forms with one click.
This extension provides a list to almost all the settings that you may need to alter in order to enhance Firefox's speed.
HttpFox Requires Restart
An HTTP analyzer addon for Firefox
Wappalyzer is a browser extension that identifies software on websites.
The easiest way ever to change IP and browse anonymously! Just activate it with one click and it's done, you're browsing the web with a random HTTP or Socks proxy list from several countries in the world. No ads. 100% free to prevent web censorship.
Accelerate your SEO efforts on the fly. SEOquake is a free plugin for browsers that provides you with key SEO metrics for a specific page, along with other useful tools such as SEO Audit and many others.
Modify Headers Requires Restart
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.
Selenium Expert (Selenium IDE) Requires Restart
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.
Hide My IP is number one tool for hiding your IP and unblocking any web site!
Charles Proxy Auto-Configuration Requires Restart
Configures Mozilla Firefox for use with Charles Web Debugging Proxy.
JS Print Setup Requires Restart
Gives you a place to put all your add-on buttons without over-crowding the navigation bar.
Auto Refresh Requires Restart
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.