UI not fitting into the window

Volumio is changing the size according to the browser window size. This is still the case when the web is loaded into the frame. In this case UI is calculated wrongly and UI does not fit into the frame.

This is not big deal as frames are not used but for kiosk mode in chromium. When kiosk needs to serve set of different web applications list of links as tiny strip emulating bookmarks bar (not available in kiosk mode) is one of the solutions.

Is it possible to correct it to take in account frames?