In excess of requirements
Well, Jabra, of course your “Jabra Direct” headset setup application is Chromium based, or whatever enormous rendering engine is en vogue today. After all, the application has at least five pages to show, and ten buttons or so, so clearly you need a full-blown web browser to show this surfeit of UI.
And of course this means that the two-bit application comes in at five processes. Efficiency is for the wimps!
And yes, of course closing the windows only does exactly that, but leaves the five processes running forever, doing God knows what, and with no sign whatsoever of their presence (such as a tray icon or so).
Another entry on the list of sometimes useful applications that nonetheless get installed only when needed and then removed immediately afterwards.