Extras para Android

JavaScript Debugger por James Ross, Robert Ginda, outros

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

ProfileSwitcher por Paolo "Kaosmos"

It adds some options to launch easily other profiles and the Profile Manager.

Disable Add-on Compatibility Checks por Kris Maglione

Reinstates the extensions.checkCompatibility preference without respect to the current application version.

Thumbnail Zoom Plus por David Adler

Shows full image when you hover over a thumbnail. Works with Amazon, Baidu Images, Bing Images, Facebook, Flickr, Google+, Google Images, IMDb, LinkedIn, Netflix, Pinterest, Reddit, Twitter, Yandex, YouTube, Wikipedia, Yahoo Images, & many more.

Proxy Tool por WebProxyList

Proxy Tool - Powerful, yet User-friendly proxy tool to manage your proxies and anonymity needs, including: 46M+ user agents (world's largest), 10 different spoofed HTTP referrers, auto-proxy rotation, plus many more. Developed by http://ProxyList.co

Shrunked Image Resizer por Geoff Lankow

Addons Manager Hilite por custom.firefox.lady

Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Version 3.0 also includes sorting buttons. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.

Browser Backgrounds por Baris Derin

Browser Backgrounds is the new Firefox extension that lets you install backgrounds directly on your browser.

URLFilter por Vasiliy Temnikov

Block advertisement and access to adult sites

Profile Buttons por Button Guy

A button to be able to open the profile folder, along with two buttons to create profiles, and also switch the current profile.

Profile Folder Button por Schuzak

Adds profile folder/directory button.

Change Referer Button por cK-LFC

Button in the toolbar/status bar to change referer value.

Addons Recent Updates por Infocatcher

Show more addons recent updates

Restartless Restart por Erik Vold

This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.

No More Install Delay por trlkly

UPDATE: XPI delay has been removed in Firefox 40!

Disable the install delay in Firefox. New 2.0 version now includes GreaseMonkey scripts!

Unlike similar addons, this works on Firefox 4 and beyond.