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Extended Copy Menu

Provides the option to copy selection as plain text or html...

Rated 4 out of 5 stars (68)
1,603 users

SEO Workers Web Page SEO Analysis Tool

SEO Workers Analysis Tool extension allows you to perform a basic analysis of the page in your browser with a single click. The results from the SEO Workers Analysis Tool are structured into the following useful groups:

General status, meta tags li...

Rated 4 out of 5 stars (2)
1,122 users

ASnumber

The AS Number Extension displays interesting information the Internet Service Provider of every website visited. Along with it come some additional statistics for those who want to know what happens behind the Webs shiny surface. All data is...

Rated 5 out of 5 stars (10)
2,295 users

GridFox

Draws a grid on top of a website

Rated 4 out of 5 stars (14)
6,128 users

AntiProtetor.in

Antiprotetor e desprotetor de links em sites e blogs de download.

Com este add-on você poderá desproteger TODOS seus downloads preferidos com apenas 1 Click!

O AntiProtetor.in reconhece links de TODOS servidores de download.

Rated 4 out of 5 stars (5)
1,578 users

YSlow

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 (164)
136,014 users

LinkChecker

Check the validity of links on any webpage.

Rated 4 out of 5 stars (73)
19,344 users

Pixel Perfect

Pixel Perfect is a Firefox/Firebug extension that allows web developers and designers to easily overlay a web composition over top of the developed HTML.

* Requires Firebug

Rated 4 out of 5 stars (87)
17,753 users

More Display Resolutions No Restart

An easy way to test website with different display resolutions

Rated 4 out of 5 stars (5)
4,642 users

Flashbug

This extension has been discontinued and merged into FlashFirebug.

Rated 3 out of 5 stars (4)
9,001 users

User Agent Changer

Adds a menu and a toolbar button to change the user agent of a browser.

Rated 4 out of 5 stars (5)
6,453 users

Format Javascript

The extension provide Javascript developer a tool to decompress the minified javascript. Minify javascript and use it to uncompress.

Rated 3 out of 5 stars (2)
1,734 users

XPather

Feature rich XPath generator, editor, inspector and simple extraction tool...

Rated 4 out of 5 stars (31)
2,001 users

Web Developer

The Web Developer extension adds various web developer tools to the browser.

Rated 5 out of 5 stars (178)
709,802 users

Stream MP3 Youtube Downloader /streamconverter.com

This Addon adds conversion & download links to many streaming sites like youtube, myvideo etc

Dieses Addon fügt zu Streaming-Sites wie Youtube und MyVideo Download-Links hinzu.

More Information / Weitere Infos: http://www.streamconverter.com

Rated 1 out of 5 stars (4)
4,823 users

Aardvark

Cool utility for cleaning up a page (for printing or better viewing) as well as for web development. Displays a red rectangle on the element under the mouse -- hit "w" to go wider (get the containing element), then hit other keystrokes to remove, etc

Rated 5 out of 5 stars (147)
3,006 users

Selenium IDE: PHP Formatters

PHP code formatters for Selenium IDE.
Created by Adam Goucher.

Rated 4 out of 5 stars (1)
5,730 users

PHP Developer Toolbar

Stop searching at PHP.net to simply remember some function signature. With this addon you can search functions quickly for the official function description directly into your browser without a new tab.
Plus, many tools to help PHP developers.

Rated 4 out of 5 stars (18)
7,128 users

MeasureIt

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

Rated 4 out of 5 stars (303)
155,472 users

SenSEO

SenSEO is an extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria.

Rated 4 out of 5 stars (40)
9,614 users