Negative numbers in MathML output has wrong spacing in Firefox

Is your feature request related to a problem? Please describe. (-1) and ({-1}) render the same in in MathJax but the output MathML render differently in Firefox

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mo stretchy="false">(</mo>
  <mo>−</mo>
  <mn>1</mn>
  <mo stretchy="false">)</mo>
</math>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mo stretchy="false">(</mo>
  <mrow data-mjx-texclass="ORD">
    <mo>−</mo>
    <mn>1</mn>
  </mrow>
  <mo stretchy="false">)</mo>
</math>

Similar problem for |-1| and |{-1}| : In MathJax:

Output MathML rendered in Firefox:

Similar problem for ordered triples (2,-3,5) and (2,{-3},5) : In MathJax:

Output MathML rendered in Firefox:

Describe the solution you'd like Add form="prefix" to <mo>−</mo>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mo stretchy="false">(</mo>
  <mo form="prefix">−</mo>
  <mn>1</mn>
  <mo stretchy="false">)</mo>
</math>

Or, add inferred mrow ?

Describe alternatives you've considered It would be good to produce <mn>-1</mn> rather than <mo>-</mo><mn>1</mn>.

Additional context Windows 11 FireFox 102.0a1 (2022-05-28) (64-bit) MathJax v3.2.2