Frames and iFrames are not currently loaded server-side by Jaxer. They require creating DOMs within the DOM, and even if Jaxer were to do this, it's not clear what DOM it should serialize and stream to the client. As a result, we felt it best that frames and iframes are not loaded at all server-side; they are left to the browser to load. (Perhaps this isn't a limitation at all but the desired behavior?)