I have a my personal application (~/bin/launch-app) that read a text file with .app extension (myapp.app) and run some stuff of things Since the myapp.app is a text file ... [lesca@dodo tmp]$ file myapp.app myapp.app: ASCII text if I try bind this file to my program launch-app via nemo, nautilus, thunar, ecc or via line command mimeopen, all other text (text/plain) file (es some.txt) are bind to my program. [lesca@dodo tmp]$ mimeopen -d /tmp/myapp.app Please choose a default application for files of type text/plain ^^^^^^^^^^^^^^^^^^^^^^^^ 1) launch-app (userapp-launch-app-LF774Z) 2) LibreOffice Main (libreoffice) 3) Geany (geany) 4) .... How to bind only .app file to my application? Many thanks -- Dario Lesca (inviato dal mio Linux Fedora 30 Workstation)