This is cool, for example, to create contacts with the developer of the game as twitter, facebook etc.
For security reasons, I would probably add that when the command executes, the game pauses and shows a pop-up message with an advice like:
"You're going to open an URL"
"It may be unsafe"
" "
"(Here will be the URL the command wants to send you)
"Only go if you're totally sure that is secure"
And the buttons: "Go" "Copy URL" "Cancel"
"Go" will open the URL
"Copy URL" will copy the URL to the clipboard but it won't open the URL
"Cancel" will only resume the game and will not open anything.
The command should be like
<open URL>(URL)
For example:
<open url>google.com