11.1.1 Browser Controller Objects 
Browser controllers provide two methods which parallel two of the
module-level convenience functions:
- open(url[, new])
 - 
  Display url using the browser handled by this controller.  If
  new is true, a new browser window is opened if possible.
 
- open_new(url)
 - 
  Open url in a new window of the browser handled by this
  controller, if possible, otherwise, open url in the only
  browser window.
 
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