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How can I associate files with same MIME but different extensions to different applications.
For example both .maff & .zip files have application/zip MIME ; But I need to open .maff by Firefox and .zip by ArchiveManager
Setting this via Open with dialog associates application to MIME that causes both files open with same application.
How can I configure this in Gnome?
I'm using Ubuntu Lucid Lynx.


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Simple way to do this is by using mimeopen command to open .maff file format using Firefox

Open terminal and type

mimeopen some_file_name.maff

You will be provided with available packages to open the .maff file

Please choose a default application for files of type application/zip

    1) Archive Manager  (file-roller)
    2) Archive Mounter  (mount-archive)
    3) Other...

select 3 from the option and enter the command as firefox

use application #3
use command: firefox

This will open up .maff file in Firefox and will be set as default program to open .maff file

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#1: This only sets default application for mimeopen and not nautilus! #2 this still only relys on mime type so setting default application for .maff will sets that application for .zip too!!! (I tried and it did) – 4r1y4n Dec 7 '12 at 22:35

I don't know what a .maff file is exactly, but you need to define a new MIME type for it. Application associations are based on MIME type and not file extension.

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.maff is the "Mozilla Archive Format" that is used by a firefox extension that actually is a zip file like .jar files; How should I define a MIME for that? Thanks – 4r1y4n Dec 7 '12 at 21:00

I posted my step-by-step solution here:

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