You can use the PPAPI versions with Chromium if you want to. You just need to extract the so file from chrome package and use it for Chromium. There are readyma

You can use the PPAPI versions with Chromium if you want to. You just need to extract the so file from chrome package and use it for Chromium. There are readymade packages available in AUR for instance. Of course your point stands that officially Chrome is the only option left.