5 May
2013
5 May
'13
10:01 a.m.
2013/5/4 David Benfell <benfell@parts-unknown.org>
Mostly they seem to originate from Thunderbird, but I'm assuming there are other sources as well.
From what I remember, Thunderbird and other Mozilla programs used to have
their own standalone implementation of notifications. Try to look at Thunderbird's settings for a checkbox which could turn them off.