Web

by vkbtbn

20 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,761 reviews

2,313,070 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 942 reviews

1,253,925 users

Customize the way a web page displays or behaves, by using small bits of JavaScript.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 238 reviews

378,821 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Web Developer by chrispederick

Rated 5 out of 5 stars 206 reviews

581,596 users

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

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 918 reviews

575,529 users

FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.

Check out my new project, FireSSH!

Evernote Web Clipper by Evernote

Rated 3 out of 5 stars 750 reviews

405,397 users

Use the Evernote Web Clipper to save things you see on the web into your Evernote account.

SQLite Manager by lazierthanthou

Rated 5 out of 5 stars 30 reviews

192,323 users

Manage any SQLite database on your computer.

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 154 reviews

175,638 users

View HTTP headers of a page and while browsing.

Font Finder by Ben Dodson, Eric Caron, others

Rated 4 out of 5 stars 64 reviews

32,371 users

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

Html Validator by Marc Gueury

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 Firefox 23+, you need 0.958 (under review)
http://users.skynet.be/mgueury/mozilla

FireMobileSimulator by thorikawa

Download Now

Experimental

Rated 4 out of 5 stars 11 reviews

48,483 users

this add-on simulates japanese mobile device.
this add-on support DoCoMo, Au(KDDI) and SoftBank device.

Vimperator by maxauthority, gkatsev

Make Firefox look and behave like Vim

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 60 reviews

138,400 users

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

FireQuery by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 51 reviews

34,173 users

Firebug plugin for jQuery development

LinkChecker by Kevin Freitas

Rated 4 out of 5 stars 76 reviews

17,484 users

Check the validity of links on any webpage.
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