I think this is okay as long as there is a compatible protocol. FF was supporting RDP/CDP for a while but recently shifted away in favor of WebDriver BiDi[0], which supports the methods required for dn[1], and now appears at parity support between Chrome and Firefox[2]

I imagine we'll get FF support in the latter half of this year.

0: https://fxdx.dev/deprecating-cdp-support-in-firefox-embracin...

1: https://w3c.github.io/webdriver-bidi/#module-network-command...

2: https://puppeteer.github.io/ispuppeteerwebdriverbidiready/