Web Pro

by webilu

74 Add-ons in this Collection

JSONView by Ben Hollis

Rated 5 out of 5 stars 170 reviews

91,618 users

View JSON documents in the browser.

All-in-One Sidebar by Ingo Wennemaring

Rated 5 out of 5 stars 1,555 reviews

160,926 users

AiOS lets you open various windows as sidebar panels, and quickly switch between them. So it put an end to the window chaos! In addition to bookmarks and history it opens dialogues such as downloads, add-ons and more in the sidebar.

ScrapBook by Gomita

Rated 4 out of 5 stars 878 reviews

133,673 users

Helps you to save Web pages and organize the collection.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 358 reviews

107,235 users

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

HttpFox by Martin Theimer

Rated 4 out of 5 stars 170 reviews

66,989 users

An HTTP analyzer addon for Firefox

Wappalyzer by Elbert Alias

Rated 4 out of 5 stars 104 reviews

67,157 users

Wappalyzer is a browser extension that identifies software on websites.

Mozilla Archive Format, with MHT and Faithful Save by Christopher Ottley, Paolo Amadini

Rated 4 out of 5 stars 321 reviews

143,495 users

— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!

Modify Headers by Gareth Hunt

Rated 4 out of 5 stars 77 reviews

107,421 users

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.

FEBE by Chuck_Baker

Rated 4 out of 5 stars 672 reviews

98,307 users

FEBE (Firefox Environment Backup Extension) allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up -- It will actually rebuild your extensions individually into installable .xpi files.

YSlow by YSlow

Rated 3 out of 5 stars 215 reviews

59,204 users

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.

JavaScript Deobfuscator by Wladimir Palant

Rated 5 out of 5 stars 20 reviews

41,793 users

This add-on shows you what JavaScript code runs on a web page, even if it is obfuscated and generated on the fly. Simply open JavaScript Deobfuscator from the Web Developer menu and watch the scripts being compiled/executed.

Html Validator by Marc Gueury

Rated 4 out of 5 stars 216 reviews

41,693 users

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Online HTML 5 validation, you need 0.962
http://users.skynet.be/mgueury/mozilla

XPath Checker by Brian Slesinsky

Rated 5 out of 5 stars 22 reviews

22,482 users

An interactive editor for XPath expressions.

FireSSH by Mime Čuvalo

Rated 4 out of 5 stars 94 reviews

25,673 users

FireSSH is a free, cross-platform SSH terminal client for Mozilla Firefox. Written entirely in Javascript!

Quick Locale Switcher by ppclick

Rated 3 out of 5 stars 88 reviews

122,330 users

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.
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