I'm using Debian Jessie 64-bit with Gnome 3.14.1.

My TIF image files are opening by default in the PDF Viewer, don't ask why. In Nautilus, I right-click on the file, click Open With|Other Application...

Select Application window

If I right-click "Image Viewer", there is only "Forget association".

Where is the "create default association" button?


I've found a ~/.config/mimeapps.list, which contains


It seems that something else is overriding this configuration.


It seems to be /etc/gnome/defaults.list, which contains


which is the PDF viewer in question. Removing this line solved this problem. The problem remains, though, if there should be a button "add default" to the image above.

  • If you just click "select" does it change the association?
    – fooot
    Nov 1, 2017 at 20:24
  • @fooot Sometimes it does, sometimes it doesn't.
    – Rodrigo
    Aug 14, 2019 at 2:15

1 Answer 1


[Debian 10.0.0 Buster + GNOME]

I see the same deficient behaviour using 'open with' as you describe.

Select any file having the MIMETYPE of interest then right-click -> Properties.

Select the 'Open With' tab.

And there you should see the Set as default button.

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