Identifier unique to the application that indicates it is Firefox or Thunderbird, etc. Same for all installations of an application regardless of the value of <var>appName</var>
Asulay assuf i usnas i d-yemmalen ama d Firefox neɣ Thunderbird, atg. Am aggad akk n usebded n yesnasen akken yebɣu yella wazal n <var>appName</var>