rhtoras what i want is simple:
Download an image
go to the folder where i downloaded the image
copy the image and paste where i want
OK, but, this was always possible, right? You can always download to ~/Downloads in the browser (firefox or iridium--restricted by unveil() to that directory), and then pick it up from there in any other program (because they're (usually) not built with unveil() restrictions).
Make sure both dbus instances (system and user-session) are running. Otherwise, you won't be able to "see" any other directories apart from ~/Downloads (read: /usr/local/share/doc/pkg-readmes/dbus).
Didn't iridium --disable-unveil work either?