Rated 5 out of 5 stars

Fantastic extension. The way Thunderbird forces one address per line is absurd. Why Thunderbird doesn't use this style of adding multiple addresses per line separated by comma is beyond me.

The only thing I didn't like about this extension is the phrase "enter one or multiple addresses..." that appears in the "TO" box in new messages. It goes away once you start typing in the box but I found the phrase an unnecessary aesthetic intrusion, as I prefer a cleaner, blank interface. So I edited the XPI file to remove the phrase. Now it is perfect.

Very well done!!

This review is for a previous version of the add-on (1.6.1).