Suggestion for the plugins/base/css/ow.css file, as it is right now lacking responsiveness.
Fix as follows:
.floatbox_body img {
background-size: cover;
max-width: 800px;
width: 100% !important;
}
.floatbox_empty .floatbox_header, .floatbox_empty .floatbox_body, .floatbox_empty .floatbox_bottom {
background-size: cover !important;
}