How do I add extension from the Extension Warehouse in the Sketchup for Schools web version

I’m having trouble locating the extension manager. I want to add extensions from the extension warehouse to my web browser for my Sketchup for School application. Can you tell me how to install the extensions? The direction for doing this assumes I know how to find the extension manager. I can’t find the extension manager on my Sketchup for Schools version.

Thank You in advance for your support.

You don’t. The web based versions of SketchUp don’t have any options to use extensions.

Thank you