Review for Message Header Toolbar Customize by gworley
Rated 4 out of 5 stars
While it does bring back some of the customizable aspects of the toolbar, it doesn't bring back all of them. I had a add-on that says it is still active and compatible with 78 since you can no longer truly customize it it cannot be accessed,.
This review is for a previous version of the add-on (2.0.8).To create your own collections, you must have a Mozilla Add-ons account.