What's your favourite "not a bug, it's a feature" feature?

I’ve come to really appreciate how Firefox bugs out when you try to drag files out of the “Downloads” pop up, into a different workspace.

With my workflow, I tend to have my browser open in one workspace and everything else on other ones, and quite often I have to download something and move it to some directory. Recently I’ve had to do a lot of this, and the “feature” I’m talking about is very neat, because once you drag a file from the downloads pop-up to another workspace, it effectively becomes an always-on-top window like pictured.


From there, you are free to drag your last 5 files into your file manager, emacs, or anything that has drag and drop!

What are some of your favourites when it comes to small “features” like these?