Google ChromeFrame

There was some debate back when this was first revealed in 2009, but the use of ChromeFrame is still relevant for some organizations that are stuck on older browsers for legacy applications.

<meta http-equiv="X-UA-Compatible" content="chrome=1" /><!-- this is for all versions of IE -->
<meta http-equiv="X-UA-Compatible" content="chrome=IE6" /><!-- this is for IE6 and lower -->
<meta http-equiv="X-UA-Compatible" content="chrome=IE7" /><!-- this is for IE7 and lower -->
<meta http-equiv="X-UA-Compatible" content="chrome=IE8" /><!-- this is for IE8 and lower -->
<meta http-equiv="X-UA-Compatible" content="chrome=IE9" /><!-- this is for IE9 and lower -->
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=IE6" /><!-- this is for IE9 and lower, passes Edge to others -->


  1. Installation can be done without Administrative rights on the Windows OS.
  2. Installation will append the ‘chromeframe’ version to the ‘User-Agent’ HTTP header sent by the browser to allow it to be parsed.


MSIE iframe frameBorder=”0″ attribute is case sensitive?

No, you are not going crazy… MSIE 6 and 7 are case sensitive for the ‘frameBorder‘ (and a few other attributes).
It seems that the JavaScript attribute names are expected to be used in the HTML, should you expect them to behave and look properly you’ll have to make some small changes to support, this is even more important when using JavaScript to update or change attributes.

<iframe... frameBorder="0"></iframe>


Added in MSIE8 and Mozilla Firefox 3.6.9, Apple Safari 4, IE8, and Google Chrome 2 are several mechanisms to defend against cross-domain forgeries.

You can add to your website to make sure it is not embedded in a frame or iframe. This avoids clickjacking.

The X-Frame-Options HTTP response header can be used to indicate whether or not a browser should be allowed to render a page in a “<frame>” or “<iframe>“. Sites can use this to avoid clickjacking attacks, by ensuring that their content is not embedded into other sites.

Supported Values:

NOTE: “ALLOW-FROM” is supported in some browsers

You can explicitly set this value for ApacheHTTP in the httpd.conf file, your .htaccess files or code it into the page(s) by the application itself.

Example, add this to the apache config file:

Header always set X-Frame-Options DENY