Web Development


IE Tab V2 (Enhanced IE Tab) Requires Restart

Note: If you are encountering the Connecting... problem see instructions below.

The updated, fully supported IE Tab. Embed IE in a Firefox tab. IE Tab Features: FF 4+ support, IE 7-9 compatibility modes, old IE Tab settings import.

Rated 4 out of 5 stars (441)
11,598 weekly downloads

BetterPrivacy-signed Requires Restart Featured

Control a new, trickier kind of cookie, better known as an LSO or Flash cookie. The BetterPrivacy safeguard offers various ways to handle Flash-cookies created by webpages with the help of your Flash plug-in...

Rated 5 out of 5 stars (445)
11,304 weekly downloads

RESTClient, a debugger for RESTful web services. Requires Restart

Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.

Please follow the link ("View other versions") below To install version 2.0.1.

Rated 4 out of 5 stars (102)
9,235 weekly downloads

User-Agent Switcher Featured

Quickly and easily switch between popular user-agent strings.

Rated 4 out of 5 stars (32)
8,959 weekly downloads

ColorZilla Requires Restart

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

Rated 5 out of 5 stars (311)
8,641 weekly downloads

Nimbus Screen Capture - editable screenshots Featured

1) Screen capture web pages.
2) Selected regions.
3) Whole browser windows.
Edit screenshots and save the images to either local file or Google Drive. Annotate screenshots in a very user-friendly interface with different tools. Upload and share!

Rated 5 out of 5 stars (298)
7,662 weekly downloads

Cookies Manager+ Requires Restart

Cookies manager to view, edit and create new cookies. It also shows extra information about cookies, allows edit multiple cookies at once and backup/restore them.

Rated 5 out of 5 stars (68)
7,418 weekly downloads

Random Agent Spoofer

Rotates complete browser profiles ( from real browsers / devices ) at a user defined time interval. It includes many extra privacy enhancing options

Rated 5 out of 5 stars (133)
6,432 weekly downloads

HttpRequester Requires Restart

A tool for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.

Rated 4 out of 5 stars (56)
6,322 weekly downloads

Hide My IP VPN

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

Rated 5 out of 5 stars (15)
6,177 weekly downloads

Autofill Requires Restart

Autofill is a small but powerful add-on that serves one purpose: fill form fields automatically on page load. It is for people who just want a straightforward form filler without all the bells and whistles.

Rated 4 out of 5 stars (56)
6,118 weekly downloads

IE Tab Requires Restart

IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...

Rated 4 out of 5 stars (1,204)
5,993 weekly downloads

User Agent Overrider

Override browser user agent string

Rated 5 out of 5 stars (57)
5,870 weekly downloads

Advanced Cookie Manager Requires Restart

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

Features List:
Export / Backup
Import / Restore
Monitor cookies

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

Rated 4 out of 5 stars (36)
5,821 weekly downloads

Live HTTP Headers Requires Restart

View HTTP headers of a page and while browsing.

Rated 4 out of 5 stars (170)
5,501 weekly downloads

Screengrab (fix version) Requires Restart Featured

Screengrab! saves webpages as images.
0.99 released!
New features: upload to internet

Rated 5 out of 5 stars (306)
5,344 weekly downloads

JavaScript Debugger Requires Restart

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.

Rated 4 out of 5 stars (49)
5,172 weekly downloads

HackBar Requires Restart

Simple security audit / Penetration test tool.

Rated 4 out of 5 stars (45)
4,948 weekly downloads

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)
4,925 weekly downloads


View JSON documents in the browser.

Rated 5 out of 5 stars (168)
4,727 weekly downloads