• About This Site Bookmarks 1.5 - Page-specific bookmarking tool with support for URL, domain, title, and selected text variables.
• Adblock Plus 1.0.2 - Werbung war gestern!
• AI Roboform Toolbar for Firefox 6.9.95 - Allows the use of Roboform in Firefox.
• BBCodeXtra 0.2.5.6 - Fügt Befehle zur Formatierung mit BBCode/HTML/XHTML dem Kontextmenü hinzu
• Better YouTube 0.4.3 - A compilation of useful Greasemonkey user scripts for YouTube. All scripts copyright their original authors. Click on the script homepage in the Help tab for more information.
• Cache View 1.61 - Displays a cache via right-click or Tools menu.
• Configuration Mania 1.10.2009031401 - More Advanced (hidden) configures
• Coralize 0.91 - Load pages, links, and images through CoralCDN.
• Custom Toolbar Buttons 0.6.0.5 - A customized version of Toolbar Buttons including the buttons : Update, Clear Data, Gmail, Link Setting, Page Info, Reload Prxy, Reload Skip Cache, Restart Tabbed, Toggle embedded content, Flash, Tiny Url, Translate
• CustomizeGoogle 0.76 - Google-Suchergebnisse durch Zusatzinformationen und Entfernen von Werbung und Spam verbessern
• DownThemAll! *nightly* 1.2alpha.20090427.1363 - The mass downloader for Firefox.
• FanFox 0.1.4 - This extension lets you know FanFou status
• FlashGetMini 1.3.0 - FlashGetMini extension for Firefox.
• Google Pagerank Status 0.9.9 - Display the Google PageRank in your browser's status bar.
• Greasemonkey 0.8.20090123.1 - Ein Benutzerskript-Manager für Firefox
• gTranslate 0.5.1 - Translates the selected text via Google Translate.
• IE Tab 1.5.20090207 - Wahlweise die Browser-Engine des Internet Explorers benutzen
• Java Quick Starter 1.0
• JavaScript Options 1.2.6 - Provides advanced JavaScript options for Firefox.
• JSView 2.0.5 - Zeigt den Quellcode externer Stylesheets und JavaScripts an
• Linkification 1.3.6 - Converts text links into genuine, clickable links.
• Microsoft .NET Framework Assistant 1.0 - Fügt ClickOnce-Unterstützung und die Möglichkeit hinzu, installierte .NET Framework-Versionen an den Webserver zu melden.
• MR Tech Toolkit 6.0.3.3 - Umfangreiche Einstellungsmöglichkeiten für die Installation von Erweiterungen und Themes
• Paste and Go 2 0.3.4.3 - Paste Text and Load/Search It Immediately
• PhPrxy - InBasic 3.1.1E - Ermöglicht anonymes Surfen mit Hilfe eines Web-basierenden Prxy's (Phrxy).
• PrefBar 4.1.2 - A toolbar for quickly accessing and changing common preferences, run scripts and many more...
• Quick Locale Switcher 1.6.9 - Schnelles Wechseln und Anwenden verschiedener Spracheinstellungen
• RefControl 0.8.11 - Bietet Kontrolle über das Senden von HTTP-Referern.
• ReGet 1.0.1.332 - ReGet native plugin for Mozilla Firefox
• ShowIP 0.8.17 - Show the IP address of the current page in the status bar. It also allows querying custom services by IP (right mouse button) and Hostname (left mouse button), like whois, netcraft. Additionally you can copy the IP address to the clipboard. This extension was formerly known as ipv6ident. License GPLv2 only.
• SkipScreen 0.1.04032009 - Skips unnecessary pages on sites like Rapidshare, Megaupload, zShare, Mediafire and more. Wherever there are unnecessary pages and superfluous links, Skipscreen will be there without Ads.
• Toolbar Buttons 0.6.0.5 - Fügt Symbolleisten-Schaltflächen hinzu.
• Torbutton 1.2.1 - Dank Torbutton können Sie den Tor-Prxy mit einem Klick ein- und ausschalten
• TwitterFox 1.7.7.1 - This extension lets you know twitter statuses.
• UI Tweaker (Formerly Toolbar Cleanup) 1.7.0 - This extension allows you to tweak various aspects of the browser's UI.
• Unhide Passwords 1.2.4 - Shows contents of password fields in cleartext.
• ViewAbout 1.4 - Enables access to various about: dialogs from the View menu.
• WebMail Ad Blocker 2.2 - More screen space! Yahoo Mail, Hotmail and Gmail advertisements take up a lot of space even if they get blocked by other addons they leave unused empty space. More screen space for your messages!

• CLEO 4.1 - Create multi-addon install package (Cleopack)
• Extended Copy Menu 1.6 - Provides the option to copy selection as plain text or html.
• FEBE 6.1 - Backup your Firefox data
• Firebug 1.4.0a21 - Web Development Evolved.
• ProfileSwitcher 1.0 - Adds the profile name to the window titile and adds options to launch other profiles
• Special Link Decoder & Encoder 1.0 - An extension to decode the special links for Thunder, Flashget and QQDownload.
• Transliterator 0.7.3 - Transliterator and keyboard mapper
• Tweak Network 1.3 - Tweak network settings.
• UltraSurf Firefox Tool
• WellRounded 2.01 - Provides rounded URL and search bars.

• Default
• Noia 2.0 eXtreme 3.63 - Based on Noia icon set.

• Adobe Acrobat: nppdf32.dll
  - Adobe PDF Plug-In For Firefox and Netscape
• IE Tab Plug-in: npietab.dll
  - IE Tab Plug-in for Mozilla/Firefox
• Java(TM) Platform SE 6 U13: npdeploytk.dll
  - Java(TM) Platform SE binary
• Java(TM) Platform SE 6 U13: npjp2.dll
  - Java Plug-in 1.6.0_13 for Netscape Navigator (DLL Helper)
• Microsoft® DRM: npdrmv2.dll
  - DRM Netscape Network Object
• Microsoft® DRM: npwmsdrm.dll
  - DRM Store Netscape Plugin
• Mozilla Default Plug-in: npnul32.dll
  - Default Plug-in
• QuickTime Plug-in 7.5.5: npqtplugin4.dll
  - The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
• QuickTime Plug-in 7.5.5: npqtplugin5.dll
  - The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
• QuickTime Plug-in 7.5.5: npqtplugin3.dll
  - The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
• QuickTime Plug-in 7.5.5: npqtplugin2.dll
  - The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
• QuickTime Plug-in 7.5.5: npqtplugin.dll
  - The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
• RealPlayer(tm) G2 LiveConnect-Enabled Plug-In (32-bit) : nppl3260.dll
  - RealPlayer(tm) LiveConnect-Enabled Plug-In
• Shockwave Flash: npswf32.dll
  - Shockwave Flash 10.0 r22
• Shockwave for Director: np32dsw.dll
  - Adobe Shockwave for Director Netscape plug-in, version 11.0
• Silverlight Plug-In: npctrl.1.0.30401.0.dll
  - 2.0.40115.0
• Windows Media Player Plug-in Dynamic Link Library: npdsplay.dll
  - Npdsplay dll
• Windows Presentation Foundation: NPWPF.dll
  - Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
• Yahoo Application State Plugin: npYState.dll
  - Yahoo Application State Plugin version 1.0.0.7

Install:

All Builds: http://downloads.mozdev.org/prefbar/

Sort by date http://downloads.mozdev.org/

Latest Version: http://downloads.mozdev.org/fasterfox/fasterfox-2.0.1-fx.xpi

Download Folder all Builds:

http://downloads.mozdev.org/fasterfox/

Install:

fasterfox-2.0.1-fx.xpi 2006-Nov-28 15:59:39 118.6 KB application/x-xpinstal

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

Homepage: http://chrispederick.com/work/user-agent-switcher/

Install/Download: http://downloads.chrispederick.com/work/user-agent-switcher/user-agent-switcher-localized.xpi

More Advanced (hidden) configures.

Configuration Mania allows you easily to configure various hidden preferences!

Configuration Mania allows you some preference, not comprehensive, but useful. There is the Preferential project, providing a comprehensive resource.

Recommended prefs

Security -> JavaScript -> Pop-up Windows -> Popup Windows on the Tabbed Browsing

You can disallow the popup windows to open new window, and get single-window-mode firefox!

Security -> Others -> Force to Delete cookies after ... days

Specifies the reservation days until long-expiration cookies is compulsorily deleted.

Browser -> UserAgent

Allow you to fake UA(your browser). Effective in the pages not to allow to browse without IE.

Browser -> High Speed Browsing -> Paint/Rendering -> Initial paint dalay

You feel firefox faster by setting this delay to 0. But, sometimes feel slower on low-spec machine, low-speed access, or heavy pages.

UI -> Others -> Unix (X-Window) style mouse behavior

Enabled on Windows PC to Emulate Unix-like mouse behavior.

Security -> Network -> Referer request-header

Allow to hide Referer where you come from. Effective in hiding parts of your privacy. However it may happen trouble on some page (particular shopping site.)

HTTP Network -> Advanced -> Maximum session connection

It is a convenient setting of Firefox for high-speed. Use it together with HTTP Network -> Connection -> Enable pipelining.

Debug

Helpful for XUL development.

Homepage: http://members.lycos.co.uk/toolbarpalette/confmania/index_en.html

Download: https://addons.mozilla.org/en-US/firefox/downloads/file/42993/configuration_mania-1.09.2008121401-fx.xpi

https://addons.mozilla.org/en-US/firefox/addons/versions/4420

Believe it or not, we really ran Windows Update from Mozilla/Firefox.

IE Tab, an extension from Taiwan, embeds Internet Explorer in a Mozilla/Firefox tab.

This extension is derived from the famous extension IE View, but much different.
While IE View always open IE-only pages in a seperate Internet Explorer window, IE Tab can view them in a Mozilla/Firefox tab. See more screenshots

Always up to date Development Build on Homepage:

http://forum.moztw.org/viewtopic.php?t=11081

Current Version:

ietab-1.5.20081203-devbuild.xpi

Download/Install:
fasterfox-2.0.0-fx+nt.xpi

Works atleast with Firefox 1.0 - 3.x

Please see also:
Original FasterFox mozdev.org page
Fasterfox page on addons.mozilla.org

Homepage: http://ninjatribe.com/xpi/

Info: http://lifehacker.com/software/firefox/lifehacker-code--about-this-site-addon-firefox-232375.php

Updated Version: http://ninjatribe.com/xpi/

There has been many request of getting About This Site extension working with Firefox 3. I couldnt find any working version yet so I decided to modify latest version

Download/Install:
aboutsite_1.5-nt.xpi

DownThemAll Nightly Builds - always up to date. For testing only!

Install and Download url: http://code.downthemall.net/nightly/

as of today actuell Version:

DownThemAll! *nightly* 1.2alpha.20081220.1160 - The mass downloader for Firefox.