The solution some sites seem to use is just to look at the user agent. I often his software sites now and if there is a Linux version with an Ubuntu package it

The solution some sites seem to use is just to look at the user agent. I often his software sites now and if there is a Linux version with an Ubuntu package it just gives me a big button that says "Download for Ubuntu", this either adds a repo or gives me a .deb which is as easy to install as a .msi.