Web Development

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Favorites (Selenium IDE) Requires Restart

A plugin for Selenium-IDE to have favorite test suites and open and execute the test suites with a single click

Rated 4 out of 5 stars (4)
4,155 weekly downloads

MeasureIt Requires Restart

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Rated 4 out of 5 stars (356)
3,961 weekly downloads

Hide My IP

Hide My IP is number one tool for hiding your IP and unblocking any web site!

Rated 5 out of 5 stars (21)
3,823 weekly downloads

Advanced Cookie Manager Requires Restart

A must have tool for Web Developers and Testers to Manage and monitor web cookies.

Features List:
Add
Delete
Modify
Export / Backup
Import / Restore
Monitor cookies

Available in English, French, Spanish, German and Italian languages.

Rated 4 out of 5 stars (35)
3,757 weekly downloads

colorPicker

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.

Rated 5 out of 5 stars (40)
3,609 weekly downloads

Wappalyzer

Wappalyzer is a browser extension that identifies software on websites.

Rated 4 out of 5 stars (101)
3,564 weekly downloads

SeoQuake SEO extension

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.

Rated 4 out of 5 stars (210)
3,550 weekly downloads

One Click Proxy IP

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.

Rated 4 out of 5 stars (34)
3,360 weekly downloads

JS Print Setup Requires Restart

Client side Javascript printer settings.
This extension implements print setup from CS Javascript, similar of MeadCo's ScriptX ActiveX control for Internet Explorer.

Rated 5 out of 5 stars (25)
3,343 weekly downloads

Proxy Switcher Featured

Access to the complete Firefox's proxy settings right from a toolbar panel

Rated 5 out of 5 stars (19)
3,324 weekly downloads

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.

Rated 4 out of 5 stars (2)
3,234 weekly downloads

Speed Tweaks (SpeedyFox)

This extension provides a list to almost all the settings that you may need to alter in order to enhance Firefox's speed.

Rated 4 out of 5 stars (24)
3,173 weekly downloads

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.

Rated 4 out of 5 stars (74)
3,108 weekly downloads

Autofill Forms Requires Restart

Autofill Forms enables you to fill out web forms with one click.

Rated 3 out of 5 stars (412)
3,106 weekly downloads

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.

http://www.grizzlyape.com/addons/auto-refresh/

Rated 3 out of 5 stars (43)
2,976 weekly downloads

Emoji Keyboard Featured

A free Emoji Keyboard extension of the web tool http://emojikeyboard.org. This extension lets you input emojis right in the Firefox web browser. It also comes with an extensive search functionality that helps easily get emoji by keywords.

Rated 5 out of 5 stars (33)
2,906 weekly downloads

Charles Proxy Auto-Configuration Requires Restart

Configures Mozilla Firefox for use with Charles Web Debugging Proxy.

Rated 4 out of 5 stars (10)
2,887 weekly downloads

Image Zoom Requires Restart

Adds zoom and rotation functionality for images...

Rated 4 out of 5 stars (341)
2,882 weekly downloads

Zawgyi-One fonts package

-Zawgyi-One script fallback fonts for Firefox (Android edition)
Addon installs Zawgyi-One font (Zawgyi-One.ttf under SIL OFL 1.1 license) that enables proper rendering of
Zawgyi-One script on all sites (Facebook, Twitter, Google, etc.),

Rated 5 out of 5 stars (2)
2,751 weekly downloads

YSlow Requires Restart

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.

Rated 3 out of 5 stars (212)
2,661 weekly downloads