Open Firefox browser with Ruby automation script

`firefox http://www.google.com`
or
system("firefox http://www.google.com")

java -jar selenium-server-xxx.jar

@browser = Selenium::Client::Driver.new(
    :host => "localhost",
    :port => 4444,
    :browser => "*firefox", #*iexplore, *firefox3, *safari...
    :url => "http://www.google.com/",
    :timeout_in_second => 60)
@browser.start_new_browser_session

system("open -a /Applications/Firefox.app/Contents/MacOS/firefox-bin http://www.google.com http://www.cpap.com")