Browsers & Web Standards
Browsers Compatibility. Web standards. WWW technical specifications
Cookie Monster 
★ As you may already know, the EU Cookie Law comes into effect on the 26th May 2012 , while there are many intepretaions of the new Cookie law as so far as implementation and enforcement goes , what is clear is that Site Visitors have to explicitly agree ...
Simple Anti AdBlock
Simple Anti AdBlock Plugin was born to help you increase your site revenue, it shows your ad-blocking visitors a custom warning, or a note, asking them to kindly disable their ad-blocker on your site, and maybe click an ad or 2. * you can choose which ...
XHTML Headers
A simple system plugin that will check the HTTP_ACCEPT headers to see if the browser supports the application/xhtml+xml MIME type, and if so, sets the Content-Type header accordingly. Since IE doesn't recognise this MIME type, the plugin is useful onl ...
Shape 5 IE6 Upgrade Warning
This plugin will show a warning message for IE6 users to upgrade their browser.
Joonami
Joonami is a Joomla! plugin that executes custom JavaScript when a user enters the infamous Konami code, just like sites featured at http://konamicodesites.com/
JavaDetect
Java Virtual Machine Detect This tool detects the Java Virtual Machine on the client. The tool lets you know if this a specific version.
stopie6
Stop Internet Explorer 6 is a module for Joomla 1.5 that will allow you to warn users of your site that it is time to move to a newer browser and will offer direct links to Firefox, Google Chrome, Safari or Internet Explorer 8 .
OpenGlobal W3C Ampersands
This Joomla plugin converts your non-compliant ampersands to W3C compliant "&". Simply install the plugin, enable it and change the order to last position to make sure you catch everything. Any ampersands on your pages which are not being used in a HT ...
Browser Update Warning
Set (and optionally require) minimum browser versions for your site. Using this plugin, you can display a warning message that the users browser is outdated, along with a suggestion that they update (or install) a browser that meets your requirements. ...