As Google’s Cast system is primarily built on web tech, those original Chromecast devices — meaning those that aren’t built on Google TV — don’t receive frequent updates.
To that end, it’s been over three years since Google last updated the firmware of that first-generation Chromecast.
In the same batch of updates, Google also released new firmware for the 3rd generation Chromecast, first launched in 2018.Meanwhile, the same support page says that the built-in Chromecast support for Android TV has been updated from version 1.42.179832 — released in 2020 — all the way to 1.56.292394.That said, Chromecast support on Android TV and Google TV devices seem to have been updated far more steadily than the support page suggests, with even newer versions having launched in recent weeks?