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Mozilla Public License




Its main use is as the controlling license for the Mozilla Application Suite and related Software . It has been adapted by others as a license for their software, most notably Sun Microsystems , as the Common Development And Distribution License for OpenSolaris (the open source version of Solaris 10).

The license is regarded as a weak Copyleft . Specifically, Source Code copied or changed under the MPL must stay under the MPL. However, they may be combined in a program with proprietary files. For example, Netscape 6 and later releases were proprietary versions of the Mozilla Application Suite. For these Netscape releases, AOL Time Warner was also exercising the exclusive rights to proprietary versions that the Netscape Public License provided to itself.

Software packages from the and the inability to mention if a derivative work was Forked from the Mozilla Application Suite , Firefox or related software.

The Mozilla Suite itself, and Mozilla Firefox , are being relicensed under the GNU General Public License (GPL) and GNU Lesser General Public License (LGPL) as well as the MPL. The relicensing effort is waiting on permission to relicense a last few remaining files, else to rewrite them.

The Free Software Foundation (FSF) considers the license "not a strong copyleft", but "unlike the X11 License " the license has "some complex restrictions" making it incompatible with the GNU GPL . They urge people not to use the license because of this incompatability unless the provision in section 13 of the MPL is exercised to provide the work under either the GPL or any other GPL-compatible license.


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