Rated 4 out of 5 stars

This is an excellent add-on! A definite lifesaver!

Btw, there is a possible bug for saved urls that *do not* have the "http..." prefix: All host urls are correctly exported, but when importing them, the add-on adds the "http..." prefix without any warning/message.
For Gmail Manager users that save their account details in Firefox, this causes the host url:
entry host="longfocus.gmanager.account"
to become
entry host="http://longfocus.gmanager.account" after import, which makes it unusable.

Other than that, it's a great add-on!

This review is for a previous version of the add-on (