Firefox: open downloaded files with system default application
107247
Firefox application associations not working in the 'Downloads' window
17193
How do I change the default application for unknown file types?
116078
How to force the user to download a file, not to view it?
148352
Opening a "known file type" into running instance of custom app - .NET
94885
How to Preload Tabs/Set Multiple Websites as Default in Firefox, IE, etc
75967
Can you use Javascript to detect a file download window created server side?
51062
Does one open a browser “on” a URL?
5706
Classic download Manager on Firefox >20
97140
Choose a default app for opening files with no extension?
97277
Does ubuntu treat downloaded files specially?
13949
How to Drag and Drop files to open application?
67998
How can I show the "Open with" file dialog?
143305
how to avoid the "downloaded application" warning for a Standard User
56119
Can I create a shortcut to open a specific application on OS X?
152597
How to launch the default (native) application for a given file from Java?
38407
Allow applications downloaded from anywhere in macOS Sierra
99169
How to install previous Firefox version?