I'm not entirely sure what you mean by "uses" ... uses where? you mean in the browser TAB title? Please be more specific, and also let me know what browser you are using please.
Browsers should display the page TITLE on navigation, history navigation, and in history dropdown. While inspecting Chrome, it works as it should. We don't "set" these names from X3 ... The browser is using page <title></title> tag.
1. Page TITLES stored in history navigation:
2. Tab titles showing the page's <title> after browser back nav: