Following the raising of this topic .deb packages open via zip file manager by default we will now ship with a defaults file extension file - i.e. what app that should be opened when you double click a file e.g. file.txt should open with our default text editor GNOME edit.
This will resolve the raised issue of .deb files not opening in gnome-software by default.
This will also resolve picture based files (png/jpg etc) should be opened in our default viewer gthumb
We do need confirmation that our mapping of file extension types map and open correctly by our default apps. please help us to confirm this.