I've never encountered a system where xdg-open did something I didn't expect. It's basically the linux variant of windows' double-click and OSX's open. If I did

I've never encountered a system where xdg-open did something I didn't expect. It's basically the linux variant of windows' double-click and OSX's open. If I did it on a text file and it would open it in Firefox I would think "Jeez what idiot chose Firefox for text files" not "Jeez xdg-open is useless".