[Bug 133133]

[emr]

If you have nautilus installed this becomes a problem because firefox
wants to use dbus engine. Firefox apparently uses the dbus engine first
to launch org.freedesktop.FileManager1 which nautilus is currently the
only app that gets launched/used this way. You have to install your own
org.freedesktop.FileManager1.service file in
~/.local/share/dbus-1/services

Also look to see if you have other FileManager1 filemanagers registered
to dbus. I had two custom Nemo and Caja, and i just copied those files
from their default location to my home directory location and changed
the Exec. Firefox gives up, and goes the xdg route - which I thought was
supposed to be the standard. This is a complete mess.

This link describes the process in detail: http://debian.distrosfaqs.org
/debian-user/iceweasel-and-dolphin/ and
https://bugzilla.mozilla.org/show_bug.cgi?id=1106916

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https://bugs.launchpad.net/bugs/133133

Title:
  "Open containing folder" is only working if nautilus is present

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