Opening the virtual keyboard on iOS does not resize the browser window (unlike Android) and hence it blocks the view of a large part of the browser. It is possible to "scroll" the page when the keyboard is opened by swiping your finger on the toolbar when it is opened, but this is more of a side effect and was not intended. Note bug 6059.
Problem with Android's approach: bug 6014
(In reply to comment #0) > Opening the virtual keyboard on iOS does not resize the browser window (unlike > Android) and hence it blocks the view of a large part of the browser. Applies to the Windows 10 virtual keyboard as well. > It is possible to "scroll" the page when the keyboard is opened by swiping your > finger on the toolbar when it is opened, but this is more of a side effect and > was not intended. This workaround does not work on Windows 10.