In a mobile device, the UI for Image Properties and Resource Browser (accessible when inserting an image to Web Content) is sized and functionally is for non-mobile devices. The Image Properties, goes off-screen slightly on some devices on a vertical (portrait) view, and due to this, it can be confusing to see the preview on the right. The Resource Browser's icons, lines and overall scale is too small to be usable (at last the user can zoom), and the "Choose File" button does nothing. Re-sizing or tapping outside the current frame or popup may cause user issues, such as Image Properties too small to use, dragging the background (behind the iframes) instead of iframes in focus. Please see attached screenshots for examples.