Helo i need blocks code to convert base 64 firebase in to image or view the base 64 from the fire base to the webviewer in app invertor

Helo i need blocks code to convert base 64 firebase in to image or view the base 64 from the fire base to the webviewer in app invertor

Try with this extension:
http://kio4.com/appinventor/277_extension_imagen_string.htm