gecko-dev/testing/web-platform/meta/mathml/__dir__.ini

prefs: [mathml.deprecated_style_attributes.disabled: true, mathml.deprecated_menclose_notation_radical.disabled: true, mathml.legacy_number_syntax.disabled: true, mathml.mathsize_names.disabled:true, mathml.mathspace_names.disabled: true, mathml.mfrac_linethickness_names.disabled:true, mathml.nonzero_unitless_lengths.disabled:true, mathml.deprecated_alignment_attributes.disabled: true, mathml.script_shift_attributes.disabled: true, mathml.mfrac_bevelled_attribute.disabled: true, mathml.mfenced_element.disabled: true]