Controls which app/extension types are allowed to be installed and limits runtime access.
This setting white-lists the allowed types of extension/apps that can be installed in Google Chrome and which hosts they can interact with. The value is a list of strings, each of which should be one of the following: 'extension', 'theme', 'user_script', 'hosted_app', 'legacy_packaged_app', 'platform_app'. See the Google Chrome extensions documentation for more information on these types.
Note that this policy also affects extensions and apps to be force-installed via ExtensionInstallForcelist.
If this setting is configured, extensions/apps which have a type that is not on the list will not be installed.
If this setting is left non-configured, no restrictions on the acceptable extension/app types are enforced.