Add-ons

Saved Password Editor by Daniel Dawson

Adds the ability to create and edit entries in the password manager.

Collector's Note Version 2.7 (2013) works for the last W2K Firefox 10.0.12esr

Wörterbuch Deutsch (de_DE) by Björn Jacke

Deutsches Wörterbuch igerman98 (de_DE, Deutschland, "neue" Rechtschreibung), für Firefox, Thunderbird und Seamonkey.

Quick Locale Switcher by ppclick

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Restartless Restart by 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.

wordlist.sourceforge en-US Hunspell Dictionary by Frank E

wordlist.sourceforge en-US spell-checker 7.1_0 by kevina packed as Mozilla dictionary.

Collector's Note My own 5 minutes contribution, credits to the Sourceforge author