Compatibility issues with Lightning Rated 4 out of 5 stars
With this add-on installed, Lightning misses its title in the tab.
The issue is described in more detail in this bug report:
Rated 5 out of 5 stars
Integrates very nicely into the default view and feels like a native feature of Thunderbird. Overall, clean, lean and elegant. Thank you for maintaining this extension!This review is for a previous version of the add-on (2.0.8).