What do you want now? (Request extensions here)

How about [Userscript] Review Audio Tweak 4?

Technically, pronunciation URL is in

window.addEventListener('willShowNextQuestion', (ev) => {
      // ev.detail.subject.readings.filter(r => r.pronunications);
})

There seems to be this audio element always exists, <audio class="quiz-audio__audio">, but it is not preloaded with <source src="..."> elements. Not sure that even if you try to preload, it will be overwritten.