WebTuna uses a small (5K) piece of JavaScript which you need to place into you site template in order to monitor your site. This JavaScript file is called webtuna.js.
The webtuna.js JavaScript code collects several key performance and analytic metrics from the end users browser which are sent back over the internet to the WebTuna data center.
The latest version of webtuna.js can downloaded from here.
You can right-click the link and “Save Target as…”
Once you’ve downloaded you will need to copy the file to your webserver and include it in your site template. Read the details about how to add the webtuna.js to your site.