Web

by vkbtbn

20 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,828 reviews

2,221,569 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 981 reviews

1,307,323 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 262 reviews

349,652 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 228 reviews

513,392 users

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

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 948 reviews

512,068 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!

SQLite Manager by lazierthanthou

Rated 5 out of 5 stars 46 reviews

204,254 users

Manage any SQLite database on your computer.

Evernote Web Clipper by Evernote

Rated 2 out of 5 stars 884 reviews

400,982 users

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

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 168 reviews

158,634 users

View HTTP headers of a page and while browsing.

Vimperator by maxauthority, gkatsev

Rated 5 out of 5 stars 193 reviews

33,113 users

Make Firefox look and behave like Vim

Font Finder by Ben Dodson, Eric Caron, others

Rated 4 out of 5 stars 68 reviews

35,363 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 Online HTML 5 validation, you need 0.962
http://users.skynet.be/mgueury/mozilla

FireMobileSimulator by thorikawa

Download Now

Experimental

Rated 4 out of 5 stars 11 reviews

46,544 users

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

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 66 reviews

131,428 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.

LinkChecker by Kevin Freitas

Rated 4 out of 5 stars 78 reviews

17,306 users

Check the validity of links on any webpage.

FireQuery by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 52 reviews

26,403 users

Firebug plugin for jQuery development
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