It would be great if you were not forced to save a file in Chromium before opening. With IE or Edge you could click on PDF, etc and have the option to Open whereby it would just download to a temp location and then open. No need to save a file that you only need temporarily or save it after the fact.
I want it in an external browser. I also want this option with EXE and other file types as well. Most of the time I don't care about the file after the fact just need it for a one time use so saving it somewhere to delete later is a pain.