MathML UpIntegrals -

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i new html, css , mathml can produce mathematics rendered in firefox pretty well, if slowly. problem how use integral symbols in stix fonts. 

<mo>&#x222b;</mo>

produces slanted symbol default. using fontfamily="stixintegralsup" has no effect on firefox produces integral symbol in other browsers. have stixmath fonts installed integral symbols not have unicode. how use these symbols without unicode?

in short, how produce integral symbol in firefox?

in short, how produce integral symbol in firefox?

<math display="block" xmlns="http://www.w3.org/1998/math/mathml"><mo>∫</mo></math>

if don't want equation centered,

<math xmlns="http://www.w3.org/1998/math/mathml"><mstyle displaystyle="true"><mo>∫</mo></mstyle></math>

update

using fontfamily="stixintegralsup" has no effect on firefox produces integral symbol in other browsers.

fontfamily deprecated can check in http://www.w3.org/tr/mathml3/chapter3.html. firefox update based on new specification others browsers weren't.


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