Some of the web based RSS readers have modes where it will automatically load the article in an iframe for you, so you don't have to actually open a new window. I know NewsBlur[1] has a mode for this, because I just went and fixed a feed that has this problem since you reminded me I could.

1: I highly recommend NewsBlur. I went through a few readers over a couple years after Google Reader shut down, and settled on NewBlur, and actually pay for it.