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how do I configure a new application type in Firefox for Mac.

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I'm trying get Firefox on Mac to open an inDesign (.indd) file. On a page, I have a file link (file:///Users/...) to a file on a network hard disk. When I click on the link, I get a popup dialog box that allows me to save the file but does not provide the "Open with..." options. Is it possible to configure firefox to open a local file by clicking on its link?

I'm trying get Firefox on Mac to open an inDesign (.indd) file. On a page, I have a file link (file:///Users/...) to a file on a network hard disk. When I click on the link, I get a popup dialog box that allows me to save the file but does not provide the "Open with..." options. Is it possible to configure firefox to open a local file by clicking on its link?

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Firefox Orange Button > Preferences > Preferences > Application

Search for the ".indd file" and change the option