Rated 5 out of 5 stars

Like many, many others, I don't care for the "tabs on top" user interface. I was really grateful that someone had written an add-on which restores the original UI!

When changes in Thunderbird 38 broke this add-on on the Mac, I contacted its developer directly, who promptly responded with a fix for the problem!

Highly recommended as an add-on for doing its job flawlessly, and kudos to rsjtdrjgfuzkfg for being fantastically responsive to my bug report.

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