revealingheart writes "Mozilla has announced the release of the Mozilla Public License 2.0. The new version provides for compatibility with the Apache and GPL licenses, improved patent protections and recent changes in copyright law. The full license text is available online. Mozilla has updated their wiki with plans to upgrade their codebase; Bugzilla has also said that they will update (with an exemption to keep the project MPL only). The MPL was previously incompatible with other copyleft licenses like the GPL. The new version is compatible (unless exempted) and doesn't require multiple licenses (as currently stands with Firefox and Thunderbird). This will allow Mozilla to incorporate Apache-licensed code; but will mean that their software becomes incompatible with GPL2 code."