Description of problem: I just enabled the CSD on Fedora 26, with this package: https://koji.fedoraproject.org/koji/buildinfo?buildID=970604 Now the window titlebar has three buttons: close, maximiize and minimize. It really should only have the close button, just like every other window on my desktop. (which is the GNOME default)
Thanks, fixed here: https://github.com/stransky/gecko-dev/commit/bc813ce9a45cdcb552756ebf161866fb7540c090