Firefox does not use default file manager




3 years ago
a month ago


(Reporter: myaverageorange, Unassigned)



47 Branch

Firefox Tracking Flags

(Not tracked)


(Whiteboard: tpi:-)



3 years ago
User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:47.0) Gecko/20100101 Firefox/47.0
Build ID: 20160623084759

Steps to reproduce:

Save a file OR open the containing folder from the downloads window. Using Fedora 24 with Cinnamon 3.0.6.

Actual results:

Firefox opens Nemo, which is not my default file manager.

Expected results:

Firefox should have opened Thunar, which is set as my default file manager on Fedora 24 + Cinnamon via mimeapps.list and mimeinfo.cache and modifications to .desktop files.

This is a known problem:


3 years ago
Component: Untriaged → Widget: Gtk
OS: Unspecified → Linux
Product: Firefox → Core
Hardware: Unspecified → x86_64
Keywords: dupeme


3 years ago
Whiteboard: tpi:-
Hi. I have the same issue (years ongoing), but I would like to add something to this bug report.

I've noted that in Nightly 53.0a1 the Downloads pane action "Open Downloads Folder" opens the Downloads directory in the default file manager, while the icon next to a download ("Open Containing Folder") opens the directory in the wrong file manager.

This is probably helpful to fix the issue.

Comment 2

2 years ago
I'm seeing this issue as well. I'm using Fedora 25 51.0.1 and gnome. When I open folders, I get Dolphin instead of Nautilus.
I'm also seeing this issue. I'm using Kubuntu 14.04.5 LTS and Firefox 54.0 (64-bit). Firefox just refuses to use Dolphin (system default) - even after changing MIME fies, etc... Also I get the same problem with Thunderbird 52.1.1 (64-bit). It looks like a general Mozilla app Linux bug

Comment 4

10 months ago
In case this helps someone else having the issue... I was actually writing this up to post a "me too" post but the issue went away after I ran 'killall nautilus'... perhaps there is some weird behavior related to that... or the gremlin in the system got bored and took a nap... who knows. Also, I did not reboot my system during any of these or my other debug steps.

Firefox: 59.0.2 (64-bit)
OS: Linux Mint 18.2

Steps to recreate:
1. visit
2. Right-click on an image and click Save Image As > Save to your Downloads folder
3. Press Ctrl+Shift+Y to bring up recent downloads
4. Click the icon button next to the download and observed that it does not open the default file manager (nemo) but instead opens nautilus. I was able to confirm it by running the following from the command line and seeing the window close:
 killall nautilus

5. Running the killall command also seemed to fix my issue. From that point on, I observed that clicking the button correctly opened Nemo

Here is some system configuration info to assist in others having the issue:

$ inxi -S
System:    Host: ***** Kernel: 4.13.0-41-generic x86_64 (64 bit) Desktop: Cinnamon 3.4.6
           Distro: Linux Mint 18.2 Sonya

$ uname -a
Linux mintbox 4.13.0-41-generic #46~16.04.1-Ubuntu SMP Thu May 3 10:06:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

$ cat /etc/linuxmint/info
EDITION="Cinnamon 64-bit"
DESCRIPTION="Linux Mint 18.2 Sonya"
GRUB_TITLE=Linux Mint 18.2 Cinnamon 64-bit

$ grep "directory" ~/.config/mimeapps.list

$ grep "directory" /usr/share/applications/mimeapps.list
grep: /usr/share/applications/mimeapps.list: No such file or directory

$ grep "directory" /usr/share/applications/mimeinfo.cache

$ grep "directory" /usr/share/applications/defaults.list 

$ echo "Note: I had created this while FF was running but it didn't see to fix the issue." > /dev/null;
$ grep "directory" ~/.local/share/applications/mimeapps.list

$ xdg-open
-> opens in Nemo

Comment 5

10 months ago
Nevermind.. the gremlin just stepped out for a minute. The bug is back. killall does NOT resolve...

anyway, my configuration is posted above. I'll probably do a fresh OS install when Mint 19 comes out and see if the issue is still around. Might do a fresh FF install too if this request is ever added:

Comment 6

10 months ago
This bug still exists for Kubuntu 14.04\Firefox 59.0b10. Konqueror file manager has no problem using the correct file manager but don't really want have to to use Konqueror open files. I am not sure which file manager Firefox launches but is a real pain to use as you can only select files using the right-click a couple of times and all too easy to drag files around in error. Please Mozilla fix this.


9 months ago
Duplicate of this bug: 1470408
Gentoo official Firefox ebuild with default USE flags.
As referenced:
Steps to reproduce:

1. Happen to have both Nemo and Nautilus file managers installed
2. Either:
- Use the "Open file" menu option
- Try to download anything
- Try to upload anything

Actual results:

Firefox opens Nautilus *even though* nemo is the default. `xdg-mime query default inode/directory` yields "nemo.desktop", `xdg-open` used on a directory opens Nemo, `cat /usr/share/applications/mimeinfo.cache | grep directory` yields "inode/directory=nemo.desktop;org.gnome.Nautilus.desktop;"

Expected results:

Nemo should be used instead.

Comment 9

a month ago

some problem
xdg-mime query default inode/directory is Thunar but firefox use dolphin .
I wonder: is it so difficult to fix this bug?

Since upgrading to Ubuntu 18.04 (from 14.04) this problem has gone away. i.e. Firefox(Quantum) uses Dolphin as the default file manager.

Unfortunately it is too late for me to confirm whether it was the Firefox upgrade (to Quantum) or Ubuntu (18.04) that fixed it but for now I am happy.

Comment 11

a month ago

Firefox quantum on gentoo :the problem is still there!! have you try to change default file-manager ?

Comment 12

a month ago

(In reply to from comment #10)

have you try to change default file-manager ?

Comment 13

a month ago

I have this too, Alberto.
My default is set to thunar and firefox keeps opening nautilus.
When I use xdg-open, thunar openes the path.
When I try through firefox, nautilus opens the path.

Post Script

Further information:

My OS is Kubuntu 18.04 (Ubuntu + KDE Plasma desktop).

Here it looks like Firefox gets the default file manager from KDE -> System Settings -> Personalisation -> Applications -> File Associations -> inode -> Directory where Application Preference Order shows Dolphin at the top of the list followed by Gwenview, PCManFM File Manager.

Duplicate of this bug: 1527063
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