Z:gnu-www-ja-license-list--60fe83-It's important to understand t/en

It's important to understand that the condition to distribute files under the MPL's terms only applies to the party that first creates and distributes the Larger Work. If it applied to their recipients as well, it would be a further restriction and incompatible with the GPL and AGPL. That said, when you make contributions to an existing project, we usually recommend that you keep your changes under the same license, even when you're not required to do so. If you receive a work under a GNU license where some files are also under the MPL, you should only remove the MPL from those files when there's a strong reason to justify it.