This extension is required for both App Proxy link translation and application password-based single sign-on. It may also be optionally used to launch the My Apps portal to search the applications you have access to.
With this extension you can: 

• Sign into password-based single sign-on applications- both directly from the application's login page and from the My Apps portal 
• Access internal company URLs while remote
• Launch into the My Apps portal to search across the applications you have access to

Learn more:
• App proxy link translation: https://learn.microsoft.com/en-us/entra/identity/app-proxy/application-proxy-configure-hard-coded-link-translation
• Password-based single sign-on: https://learn.microsoft.com/en-us/entra/identity/enterprise-apps/configure-password-single-sign-on-non-gallery-applications
• My Apps portal: https://learn.microsoft.com/en-us/entra/identity/enterprise-apps/myapps-overview