Hangs TB8b5, but how do I tell devs? Rated 1 out of 5 stars
The TB addon (in)compatibility reporter also hangs on submit.
The support page http://www.mozilla.org/projects/calendar/releases/lightning1.0b7.html is dead, too, leaving no option to communicate with developers other than here.
P.S. Project home http://www.mozilla.org/projects/calendar/lightning is grossly outdated, and the download section there offers only1.0b5 for TB 3!