Official *binaries* of this product released by the Instantbird team
(http://www.instantbird.com/) are made available under the GNU General
Public License GPL version 2.0 or later.
All of the *source code* for this product is available under licenses
which are both free and open source.
Most is available under one of the following:
- the Mozilla Public License (MPL) 2.0,
- the GNU General Public License (GPL) 2.0 or later,
- the GNU Lesser General Public License (LGPL) 2.1 or later.
The remainder of the software is available under a variety of more permissive
See about:license for details.