Ordinarily speaking, you can easily update Chromecast firmware using one of a few methods — and that may be possible again in the future if Google restores functionality to these devices.

As long as Google keeps supporting the Chromecast generation you're using, your device should continue receiving updates automatically. One of the easiest ways to ensure your Chromecast is up to ...

The most common way to update a Chromecast is via the Google Home app. For devices that don't support the app, they can be directly updated via the UI.