I was mistaken by "some browsers", it seems that actually only Firefox nightly has it enabled at the moment: https://developer.mozilla.org/en-US/docs/Web/JavaSc

I was mistaken by "some browsers", it seems that actually only Firefox nightly has it enabled at the moment: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/transfer#Browser_compatibility https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... So yeah, not good enough to be used in production.