Louis

Super Browser Detector adds PHP user agent information to the body class to help target specific devices, browsers, and operating systems with CSS.
Major features in User Agent Body Class include:
<ul>
<li>Adds user browser and operating system information as a string to the body class.</li>
</ul>

Super Browser Detector

License: GPLv2 or later Super Browser Detector adds PHP user agent information to the body class

ShervinQQ

Users who haven’t newer browser are unable to see part of website that coded in html5 css3 or new web technologies and some function may not work as supposed which can result in strange behaviors when browsing around. by this plugin you can notify users to upgrade their browser or recommend them to use which browser. 
setting for time , recommend browser , min version of browser and … 
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Support: 
Chrome 
Firefox 
Internet Explorer 
Internet Explorer Mobile 
Opera 
Opera Mobile 
Opera Mini 
Safari

Browsers Need to be Updated

Users who haven't newer browser are unable to see part of website that coded in html5 css3 or new web technologies and some function may not work …

Super Browser Detector vs Browsers Need to be Updated