Hi Ankit, Thank you for clarifying, When you launch the extension application - it first initialises the '**SYMPHONY.services**'. You can run '**SYMPHONY.services.subscribe()**' to subscribe your local application. The '**SYMPHONY.services.subscribe()**' is an important process for the extension application registration. It finds a service - either local or remote - that has been registered and returns it. It will returns false if the service does not exist. Failure to subscribe to a Symphony service is the indicator that your in a web browser - as you will see the response as '**false**' confirming that it is launched from with the web browser. You will be able to find out more information on the following documentation: https://docs.developers.symphony.com/building-extension-applications-on-symphony/overview-of-extension-api/extension-api-services/register-and-subscribe Please let us know should you have any further question or feedback.

Hi Ankit, Thank you for clarifying, When you launch the extension application - it first initialises the '**SYMPHONY.services**'. You can run '**SYMPHONY.services.subscribe()**' to subscribe your local application. The '**SYMPHONY.services.subscribe()**' is an important process for the extension application registration. It finds a service - either local or remote - that has been registered and returns it. It will returns false if the service does not exist. Failure to subscribe to a Symphony service is the indicator that your in a web browser - as you will see the response as 'false'. You will be able to find out more information on the following documentation: https://docs.developers.symphony.com/building-extension-applications-on-symphony/overview-of-extension-api/extension-api-services/register-and-subscribe Please let us know should you have any further question or feedback.