Don’t use your primary system
As is always the case with an in-development feature, you shouldn’t experiment using a Chromebook you regularly rely on. In its alpha phase, Steam on Chrome OS is vulnerable to bugs, glitches, crashes, and unpredictable behaviors. You should, therefore, only use a backup Chromebook or dig up an old one you’ve since replaced. Google agrees, and warned users on its Chromium Projects page to take precautions before trying Steam in its current stage.
“Alpha means anything can break. Due to the inherent instability of the Dev channel and the in-progress nature of this feature, we don’t recommend trying this on a Chromebook that you rely on for work, school, or other daily activities. You will encounter crashes, performance regressions, and never-before-seen bugs – that’s part of the fun!”
You can find a full list of known issues by visiting this link.
