Helpful Resources to develop Mozilla Extension

http://www.borngeek.com/firefox/toolbar-tutorial/chapter-1/
 
http://ancaluca.blogspot.com/2007/10/java-firefox-extension.html
 
http://groups.google.com/group/mozilla.dev.tech.java/browse_thread/thread/41a2db6eb748e6f6
 
http://kb.mozillazine.org/Dev_:_Extensions - part of MozillaZine knowledge base

https://developer.mozilla.org/en/extensions 

https://developer.mozilla.org/en/setting_up_extension_development_environment

http://kb.mozillazine.org/Getting_started_with_extension_development#Setting_up_your_environment 

http://mozilla-firefox-extension-dev.blogspot.com/ 

http://blog.mozilla.com/addons/2009/02/06/making-extension-development-easier/ 

http://ostatic.com/blog/mozillas-jetpack-to-make-firefox-extension-development-easier-more-widespread

http://www.google.co.in/url?sa=t&source=web&cd=9&ved=0CEcQFjAI&url=http%3A%2F%2Fblog.mozilla.com%2Faddons%2F2009%2F01%2F28%2Fhow-to-develop-a-firefox-extension%2F&ei=ciBeTda5LM3trQfQqdHQDg&usg=AFQjCNGoFPV5LIWSPC3tZP487c9sgh_xeg&sig2=txlbI-iM_C8VmN4vcAQysw  




File i/o:
https://developer.mozilla.org/En/Code_snippets:File_I/O#Writing_to_a_file

Web: 
http://www.mozilla.org/projects/firefox/extensions/

How to write Firefox extensions:
http://extensions.roachfiend.com/howto.php

Writing Firefox/Thunderbird Extensions
http://www.bengoodger.com/software/mb/extensions/howto.html

From "the law of averages >> Writing Mozilla Extensions":
http://www.yergler.net/blog/archives/2004/05/20/writing-mozilla-extensions
http://devedge.netscape.com/viewsource/2002/toolbar/
GUID Generator: http://extensions.roachfiend.com/cgi-bin/guid.pl
Firefox Extension RDF Generator: http://ted.mielczarek.org

Books: 
"Creating Applications with Mozilla" by David Boswell, Brian King, Ian Oeschger, Pete Collins & Eric Murphy



Miscellaneous:

XUL Tutorial:
http://www.xulplanet.com/tutorials/xultu/

XUL Reference:
http://www.xulplanet.com/references/