This appears to be because Software-Center doesn't accept file:/// URIs, which appears to be is the type of URI that Firefox passes to it, when you do "Open With: [Ubuntu Software Center]" in the file-download dialog.
Simpler steps to reproduce: 1. Download a deb to e.g. /tmp/foo.deb 2. Run in a terminal: "software-center file:///tmp/foo.deb" 3. Close software-center 4. Run in a terminal: software-center /tmp/foo.deb" Step 2 is broken, step 4 works. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/752376 Title: Software center won't allow install from .deb file -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
