DataMiner Cube doesn't use cookies, but stores some configuration and caching in your userdata and programdata folders.

In the mobile web applications, we try to avoid using cookies at all, instead these apps make use of "local storage" in the browser to store some settings (like the sidebar width, login "remember me" functionality, etc). Cookies are only used in case "local storage" isn't available (although I think in modern browsers local storage is now always available so we don't use cookies anymore). The legacy Dashboards uses cookies to store session information (session cookies are cleared when closing the browser).

It's possible to see this in the browser by opening the developer tools (F12), on the "Application" tab you can see everything the web pages stores in the browser (cookies, local storage, etc).

Note that accessing cloud features (dataminer.services) does make use of several cookies, more information about this can be found by clicking on the cookies icon on http://dataminer.services.