Review for Hebrew Calendar by Kelly
Rated 5 out of 5 stars
Been using this for months - I would compare this extension to a Kippah, it reminds you of the presence of Hashem whenever you have your browser open (which for IT people like myself is all day.)
This review is for a previous version of the add-on (1.0.4.86).To create your own collections, you must have a Mozilla Add-ons account.