Why does this extension on Firefox need "Access your data for all websites", when it seemingly could have made do with "Access your data for sites in the “named

Why does this extension on Firefox need "Access your data for all websites", when it seemingly could have made do with "Access your data for sites in the “named” domain"? https://support.mozilla.org/en-US/kb/permission-request-messages-firefox-extensions https://support.mozilla.org/en-US/kb/permission-request-mess...