Firebug how to (For addons/extensions)

Can anyone recommend a tutorial on how to use firebug with Firefox Addon development?

Most google and youtube searches 开发者_Python百科only give me results on how to use it for webpages :(

My main requirement right now is to see and modify if my addon is saving to localstorage.

Thanks!

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http://getfirebug.com/wiki/index.php/Firebug_Internals#How_to_write_a_Firebug_extension.3F and more links from that page eg: http://www.softwareishard.com/blog/category/firebug/