Is Mozilla Thunderbird free to use?

Yes, **Mozilla Thunderbird** is completely free and open-source software. It is developed by MZLA Technologies Corporation, a subsidiary of the Mozilla Foundation, and is distributed under the Mozilla Public License 2.0, allowing users to use, copy, and distribute it freely.

What operating systems does Mozilla Thunderbird support?

**Mozilla Thunderbird** is a cross-platform application available for Windows (10 or later), macOS (10.15 or later), and Linux (requiring specific libraries like GTK+ 3.14 or higher). It also has a mobile version for Android.

Can I use Mozilla Thunderbird with multiple email accounts?

Absolutely. **Thunderbird** is designed to manage multiple email accounts from a single interface, supporting IMAP, POP, and SMTP protocols. It can automatically detect settings for popular email providers, making setup straightforward.

Mozilla Thunderbird 152

Mozilla Thunderbird 155.0 Alpha 1 Free Download for Windows & macOS

Rehan Mir
August 6, 2026
Android, Browsers, Communication, Linux, Mac, Portable, Windows

Download the free, open-source Mozilla Thunderbird 147.0.2 email client for Windows 10 or later. This 73.75 MB utility includes calendar, contacts, and…