`mozPreservesPitch` has been marked as deprecated and aliased to `preservesPitch` in the attached patch so that we can gather usage data before we remove it completely. For complete removal, please see: #1765201 Remove support for deprecated mozPreservesPitch
Bug 1652950 Comment 5 Edit History
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`mozPreservesPitch` has been marked as deprecated and aliased to `preservesPitch` in the attached patch so that we can gather usage data before we remove it completely. For complete removal, please see: bug 1765201 Remove support for deprecated mozPreservesPitch