diagnostics - panel "as if" problem with windows in this panel

After logging in to OMV with a web browser, how to control the position and size of windows in the diagnostics section. I cannot smoothly move windows so that, for example, information about the system and services are next to each other (horizontally). I don't know how to remember my setting. Exiting and returning to this section causes the size of the windows to revert to some standard size. It also behaves like that with you? Firefox browser (current version of course)