How to run Thunderbird in the background?

I want to get instant notifications for new emails and I don't want to install and configure an extra program for that. Thunderbird shows notifications, so does Gmail webapp. But both of them work only as long as they are open and running (or minimized).

Is there a way to have Thunderbird show notifications without keeping it open (at least the GUI)?

OS: Ubuntu 14.04

Thanks

Solution 1:

I recommend (and use) FireTray, which you can get at https://addons.mozilla.org/en-us/thunderbird/addon/firetray/.

It will keep Thunderbird running in the background, and then notify you of new emails.

Solution 2:

As FireTray is not supporting the Thunderbird version 68+
You can get still receive emails in background by using another trustfull Ubuntu app named as Geary (I am also using it).
So to install Geary, use the below command -

sudo apt install geary

That's it.
Now open it and do the formalties saying by geary and then
go to preferences, check the checkbox named as [✔] Watch for new mail when closed.
You have all done here.
Enjoy !

Solution 3:

You can use minimize to tray add-on; TB needs to start though. See this link for description and downloading