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JSON-DataView Requires Restart

Displays JSON data in a collapsible tree structure with syntax highlights.

Rated 5 out of 5 stars (12)
1,712 users

Toggle JS

A simple toolbar button to quickly toggle javascript between enabled or disabled.
A green shield is shown when javascript is enabled and a red shield is shown when it is disabled

Rated 5 out of 5 stars (15)
8,745 users

PrefBar Requires Restart

The all in one toolbar(item). Houses and manages bigger amounts of buttons (Clear Cache, Clear Cookies, ...), Menus (User Agent spoof...) and checkboxes (Javascript, Flash, ...). Extensible from online-database or with self created buttons.

Rated 5 out of 5 stars (40)
15,924 users

Console² Requires Restart

Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.

Rated 5 out of 5 stars (49)
6,930 users

Pentadactyl

Firefox for Vim and Links addicts.

Rated 5 out of 5 stars (139)
1,478 users

Form History Control Requires Restart

Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller.

Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.

Control for which webpage form history is saved or not.

Rated 5 out of 5 stars (88)
24,893 users

Firepicker Requires Restart

Simple color picker plugin for Firebug.

Rated 5 out of 5 stars (56)
14,491 users

Extended Link Properties + (obsolete) Requires Restart

This application extends the Link Properties and displays File Size, Last Modified Date, Content Type and HTTP Header of a link...
Warning: developing discontinued, see least

Rated 5 out of 5 stars (14)
701 users

Toggle Mixed Active Content

An icon that toggles the preference of blocking mixed active content.
Preference Name: security.mixed_content.block_active_content

Rated 5 out of 5 stars (11)
4,968 users

Flagfox

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

Rated 5 out of 5 stars (673)
490,020 users

Stacked Inspector Requires Restart

Switch DOM Inspector to an over/under vertical layout instead of the usual side-by-side panel layout.

Rated 5 out of 5 stars (9)
366 users

Scroll Up Folder

Goes up a folder of a website.

Rated 5 out of 5 stars (31)
590 users

HostAdmin Requires Restart

Switch domain-ip mapping by a SIMPLE CLICK. In addition, DNS would be refreshed whenever your change host by HostAdmin or Manually.

Rated 5 out of 5 stars (25)
13,568 users

Domain Auction Metrics by DomCop

Domain Auction Metrics by DomCop provides domain metrics for GoDaddy Auctions, NameJet, SnapNames, DynaDot and Sedo. View Page Rank, Majestic Trust Flow, Moz Rank and Domain Authority, SimilarWeb Rank, SEMrush Metrics, Alexa Rank, Estibot metrics.

Rated 5 out of 5 stars (22)
1,072 users

All About Location Bar Requires Restart

Make URL modification an accurate, smooth and simple experience

Rated 5 out of 5 stars (19)
307 users

JSONView

View JSON documents in the browser.

Rated 5 out of 5 stars (171)
114,313 users

JS Print Setup Requires Restart

Client side Javascript printer settings.
This extension implements print setup from CS Javascript, similar of MeadCo's ScriptX ActiveX control for Internet Explorer.

Rated 5 out of 5 stars (27)
60,567 users

Juicy Studio Accessibility Toolbar Requires Restart

The toolbar enables developers to examine WAI-ARIA live regions roles and properties, examine data tables, and determine if the colour contrast is sufficient.

Rated 5 out of 5 stars (14)
2,003 users

The Addon Bar (Restored)

Gives you a place to put all your add-on buttons without over-crowding the navigation bar.

Rated 5 out of 5 stars (337)
105,285 users

FillForms Requires Restart

FillForm is a small extension to help you fill page forms.
Fill out current web all forms with a keyboard shortcut(Alt + Q).

Rated 5 out of 5 stars (35)
3,555 users