Rated 4 out of 5 stars

Snippets don't work in version 0.6.x, we are all waiting for an update.

In the meantime you can install version 0.5.7.5 with working snippets from here:

http://www. xup.in/dl,20437378/gmail_manager-0.5.7.5-fx+sm.xpi

This review is for a previous version of the add-on (0.6.1).