OT: 'proprietary' software

[Amedee Van Gasse (Ubuntu)]

On Sun, May 31, 2009 22:39, Chris Mohler wrote:
> On Sun, May 31, 2009 at 3:31 PM, Karl F. Larsen <klarsen1 at gmail.com>
> wrote:
>
>> Markus Schönhaber wrote:
>>
>>> Piper:
>>>
>>>
>>>
>>>> comparative observations on Thunderbird? It is proprietary SW so am
>>>> not considering it but I am curious.
>>>>
>>>
>>> Thunderbird is proprietary software and you are therefore not using
>>> it? That is an interesting statement for someone who is using a mail
>>> client identifying itself as "Microsoft Outlook Express" to send this
>>> very statement.
>>>
>>>
>> Â  Â As said before, Thunderbird is made by the same people who make
>> Firefox. Both are made for Linux and Windows up to the latest model. It
>> is free and you download it from a web page and it is licensed under the
>>  GNU standard. So please go away.
>>
>
> FF and Thunderbird are both licensed under the MPL (Mozilla Public
> License) - not GPL.

The MPL is still a Public License, just like the GPL is a public license.
MPL software is no proprietary software.