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Mozilla Rule

Copyleft is file-level: Modifications are files containing Covered Software

Catalog row in Vendor License Rules · Cited

Kind
Definition
Statement
MPL 2.0 Section 1.10 defines Modifications as files in Source Code Form that change Covered Software or new files that contain Covered Software. Files that contain no MPL code are not Modifications (FAQ Q11), so the copyleft reaches only the MPL files and changes to them, not the whole program. (Licence undated; released January 2012; FAQ last updated 2024-01-30.)
Applies when
Deciding which files of a product must be released under the MPL.
Applies to
Any product that modifies or incorporates MPL source files.
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