About this Add-on
This Add-on adds a toolbar to support this.
With version 1.1 I introduced as an experiment to style the Thunderbird button like the Firefox button when it is placed on the left of the tabs.
To create your own collections, you must have a Mozilla Add-ons account.
Some add-ons ask for permission to perform certain functions. Since you’re in control of your Firefox, the choice to grant or deny these requests is yours.
Please note this add-on uses legacy technology, which gives it access to all browser functions and data without requesting your permission.