How does comet update itself?

Edit: approximately like so:

    curl -sS -X POST -H 'Content-Type: application/json' -d '{"request":{"protocol":"4.0","updater":"CometUpdater","updaterversion":"0","os":{"platform":"win","version":"10","arch":"x64"},"apps":[{"appid":"{42e10078-e377-4166-965f-c14ad958a146}","version":"0.0.0.0","updatechecks":[{}]}]}}' https://www.perplexity.ai/rest/browser/update2 | sed "s/^)]}'//" | jq -r '.response.apps[0].updatecheck.nextversion'