title: How to check the last available version of Chrome and Firefox using C# or JavaScript?
body: <p>One of the requirements of one of my clients is to show a message to a user that's using an older version of Firefox, Chrome, IE or Safari. For the last two it's easy (IE 9+ and Safari 5+). But for Firefox and Chrome, the requirement is that the site supports the current and the previous version of each browser.
  To get the clients browser and version is quite simple, but I need to know what is the last version of each browser. Is there any way of doing that?</p>