Conflicts with gpg-agent when installed on ChromeOS and synced to desktop

[leoluk]

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Scenario:

• Desktop workstation that uses gpg2/gpg-agent for SSH authentication.
• ChromeOS device that uses the Smart Card Connector extension.
• Chrome profile is synchronized between desktop workstation and ChromeOS.

On the workstation, the extension exclusively grabs the YubiKey interface and breaks gpg-agent. There's no way to disable the (unused) Smart Card Connector extension on the desktop workstation without also uninstalling it from ChromeOS.

[leoluk]

Figured out workaround: one can use device-local policy (i.e. managed.json) to add the extension to ExtensionInstallBlacklist. Disabling it that way isn't synced to the profile and only disables the extension on the desktop.