Mr C, it takes time but there is an app or extension that does everything you want on a Chrome book. If the app doesn't work, stick the app on the SD card and it will open what it finds around it.
Not however MRI results. I brought home the results of a scan this week, packaged on the DVD was a viewing program and the data. Copied to my PC and laptop it works perfectly but not on the Chrome book.
Why did I copy it ? Because once handed over to the doctor I won't see the DVD again - and besides, sliding on-screen through a human body's knee joints is better than a computer game. Oh, just to add, the .jpg sections copy to the Chrome book but not the automated viewing program.