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CloseReview for Yahoo! Mail Notifier by Mark L.
Rated 5 out of 5 stars
Light, easy to use. You can set it to automatically log in and check for new mail on start up. Click on it to open mail in new tab. Have a handy sliding alert when new mail arrives with sound, if you wish. Almost like having a desktop app. Great extension.
This review is for a previous version of the add-on (0.9.9.2).To create your own collections, you must have a Mozilla Add-ons account.