Demodesk uses special key combinations to enable copy & paste inside of the virtual browser:
WIN:
[ctrl] + [alt] + [c] (copy)
[ctrl] + [alt] + [v] (paste)
MAC:
[ctrl] + [cmd] + [c] (copy)
[ctrl] + [cmd] + [v] (paste)
For copy and pasting from outside into the virtual browser, use following commands:
WIN:
[ctrl] + [c] (copy)
[ctrl] + [v] (paste)
MAC:
[ctrl] + [c] (copy)
[ctrl] + [v] (paste)