how can i reset this setting

How can I reset this setting for opening file to default or to unspecified?

This problem affects both firefox and firefox-trunc installed in Ubuntu.

UPDATE: append screenshots 1) Can't choose other Helpers apps but shown on 2) in Mozilla->Prefs->Applications i'dont see any app for bin but the default program for openning is libreoffice enter image description here

enter image description here

  • 1
    can you select "ask" from the dropdown and then check the "do this automagically" box? – Joshua Besneatte May 28 '18 at 15:36

Option One - Via Firefox

In Firefox -> Preferences -> General -> Applications:

You can set "bin" to be "always ask"

Firefox Preferences

Option Two - Nuke Your MimeTypes File

This will reset all of your file associations.

rm ~/.mozilla/firefox/(unique id).default/mimeTypes.rdf

You will need to replace (unique id) with whatever yours is named.

Option Three - Edit Your MimeTypes File

nano ~/.mozilla/firefox/(unique id).default/mimeTypes.rdf

Look for the part about "bin" and you can change it to something like this:

  <RDF:Description RDF:about="urn:scheme:bin"
    <NC:handlerProp RDF:resource="urn:scheme:handler:bin"/>

Notice the "alwaysAsk=true" part... this is what will need to be changed in your file

| improve this answer | |
  • 1
    as advised by kb.mozillazine i deleted rm -rf mimeTypes.rdf and then choose new app handler for archives as archive manager. and from now i 'm having "archive manager" just like libreoffice it cover all unknown types as default down-loader. In short words problem persist the Firefox does not ask for unknown types, but substitute a selected – Yurij May 29 '18 at 10:38

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