Hallo Joop, let it go and don't be sorry. It gave me a good starting point: With the help of this source code ...
Both -Dbrowser.arg0="@url" and -Dbrowser.arg0="$url" do work, but -Dbrowser.arg="@url does not work.
With e.g. -Dbrowser.arg0="-jsconsole" and -Dbrowser.arg1="$url" you'll pass 2 arguments to the browser.
Regards, Wim.