FormAuthentication Signout when browser close

How can I signout FormAuthentication when browser or tab close?

using MVC 4 c#.

You can try to use body.onblur event and do a location.href = '/account/logoff' (but it will not work 100%). Also you can specify a small timeout in your web.config (default is 30 minutes).

Code:

---

<authentication mode="Forms">
      <forms loginUrl="~/Account/LogOn" timeout="5"/>
    </authentication>

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