Doesn't work in Firefox.

Edit: Firefox 133.0. Console shows error giving url: https://react.dev/errors/418?invariant=418

It works in Firefox Nightly (135.0a1) for Android for me, although I have to accept the microphone prompt twice for some reason.

Works fine in Firefox 133 here.

What do you have to say about all the claims this is just a pretext to clone voices for nefarious ends?

Conspiracy theories are fun! But we're a language learning app (YC s21). We help non native English speakers to work on their accents so they can speak English confidently. The accent oracle is a marketing tool for us to get in front of new users.