ClearWindowNameForNewBrowsingContextGroup

This policy controls whether window.name can be cleared for cross-site top-level navigations which result in a new browsing context group being created when the ClearCrossSiteCrossBrowsingContextGroupWindowName variation is enabled. The ClearCrossSiteCrossBrowsingContextGroupWindowName variation controls whether window.name will be cleared for cross-site top-level navigations. Examples of such navigations include a user navigating to a new site via the omnibox or clicking on a link to a new site when the link uses "target='_blank' rel='noopener'". Clearing window.name in these cases prevents information from potentially leaking between sites via the window.name property, improving user privacy. ClearWindowNameForNewBrowsingContextGroup policy is in place to restore the previous behavior. When the ClearCrossSiteCrossBrowsingContextGroupWindowName variation is enabled window.name will be cleared for qualifying navigations if this policy is set to Enabled or not set. If it is disabled, window.name will not be cleared. If you must use the policy to disable window.name clearing on qualifying navigations, please file a bug on https://crbug.com/new?component=1456652&template=1937639&cc=ladan@chromium.org,miketaylr@chromium.org&noWizard=true explaining your use case. The policy is scheduled to be offered through Google Chrome version 142.