No new mail notification in Thunderbird

I am using Thunderbird 31 on Ubuntu. I set up my accounts and then I closed Thunderbird.

But I'm not getting any notification.

Is there any add-on I need?

Solution 1:

Thunderbird needs to be open if you want to get notifications.
But you can use addons to "hide" it in the tray.

There is an addon called Minimize to Tray in Thunderbird to achieve that.
Once you've installed it press F9 to minimize Thunderbird to the system tray.
You will keep on receiving the notifications when it is minimized.

Solution 2:

Use firetray: https://addons.mozilla.org/en-us/thunderbird/addon/firetray/

You can configure close button to minimize to tray, control notifications etc.