yes sadly this is true - or, worse. actuallly it's now less than half the screen. another stupid regression in useability for no reason
here's a pic of the v11 browser with tape measure for reference. you can see the vertical height of the browser window itself (ignoring the unnecessarily tall header) is only about 6 inches of the total 14 inch vertical screen available. Can't be moved up or expanded any bigger. Much worse than v10 browser which itself was worse than the old v8(?) browser that let you go full screen
Legacy S / X apparently now have restricted screen area useable by browser.