Rated 1 out of 5 stars

does not work
Не работает,цифры не показывает

Rated 5 out of 5 stars

Just what I was looking for. 5 stars already with just a little inquiry: it would be great to be able to count collapsed accounts with Inboxes unread messages only ;-)
One is not interested to know about spam, trash or other filtered unread mails

Rated 2 out of 5 stars

I cannot see any digits near account name.
May be some add-ons blocked this add-on?

Rated 5 out of 5 stars

Долго ждал подобного! Спасибо автору!!!

Rated 4 out of 5 stars

Excellent! Just what I was looking for. Amazing Mozilla never added this feature. I will make it 5 stars if I can change the font color to red or something more visible then just black which seems to blend into everything.