Mozilla, get a clue Rated 4 out of 5 stars

Lightning is better than Thunderbird itself, but as long as this add-on is going to be part of that half-baked email client it should at least keep up with the betas. There's no incentive to beta test TB without it.

This review is for a previous version of the add-on (1.9).  This user has a previous review of this add-on.