When upgrading an extension, additional permissions may be required to ensure optimal performance. This could include permissions to access certain files or folders, create and delete files, or make changes to the registry. It is important to ensure that any permissions required are granted before proceeding with the extension upgrade. Failure to do so could result in the extension not being able to run properly or at all. It is also important to note that some permissions may need to be revoked after the upgrade has been completed. It is possible to check which permissions are required for any extension prior to upgrading it, and this should be done to ensure that the upgrade process goes smoothly.