Review for Yahoo! Mail Notifier by jodi
Rated 5 out of 5 stars
excellent plugin, but yahoo mail is still a trainwreck which causes many problems not related to the brilliant execution of this plugin; peep this article for essentially everything wrong with yahoo mail:
http://variableghz.com/2009/01/why-yahoo-mail-still-sucks/
To create your own collections, you must have a Mozilla Add-ons account.