Summary and Motivation Deprecate and remove -webkit-font-size-delta[1], Because the usage of this property is low[2] And this property is non-standard[3]. On the basis of the above, we make this intent to remove this property.
Interoperability and Compatibility Risk Firefox: Not supported Webkit: supported
Alternative implementation suggestion for web developers Use the 'font-size', because '-webkit-font-size-delta' is currently being overridden[4] if 'font-size' is specified.
Usage information from UseCounter The usage is estimated as 0.007%[2]