CodePro Analytix: Where to find the plugin

You can install it from Eclipse Marketplace: https://marketplace.eclipse.org/content/codepro-analytix

But be careful, it's outdated and doesn't work with Juno or higher versions of Eclipse.

That is an Eclipse update site, you can't open it in a web browser.

Instead you install it from Eclipse by opening 'Help > Install New Software...'. In the 'Work with:' field enter the update site URL for example https://dl.google.com/eclipse/inst/codepro/latest/3.7 which still works with Eclipse Oxygen.

Eclipse will then show you what can be installed from the update site.

Note: This code does not appear to have been updated for a while.