Can I disable Chrome browser's Guest Mode?

Similar to disabling Incognito mode to stop users bypassing extensions, is there a way to disable Chrome's Guest Window?

Solution 1:

I worked out a solution that is now possible since May 2019 using policies and the same method as disabling Incognito mode.

If you're using chrome, create the folder /etc/opt/chrome/policies/managed. (I'm guessing if you're using chromium, create the folder /etc/chromium/policies/managed.)

Then create a file in that directory named test_policy.json. It can have any name you want, but it needs the extension to be .json.

Open it in your favorite editor and put:

{ "BrowserGuestModeEnabled": false }

(Updated) Source: https://chromeenterprise.google/policies/