In vSphere 6.5, we have released a supported version of an HTML5 based web client which we call “vSphere Client”. Our long-term direction is to utilize HTML5. VMware agrees that Flash is not the solution for the long-term. A detailed FAQ can be found here in this KB article a summary of the changes are given below in this blog post. VSphere 6.5 brings with it significant changes to the vCenter Server management clients including the vSphere Web Client and new HTML5 based vSphere Client.
