How to disable the "is not responding" message on Fedora

If this is a gnome based app, as it looks like, the function named delete_ping_timeout_func is called whenever a timeout happens to show this popup.

The timeout is defined in the mutter source and is not configurable without recompiling the library as shown here.

#define PING_TIMEOUT_DELAY 5000

Use this extension to remove the popup. https://extensions.gnome.org/extension/2257/disable-force-quit-or-wait-button/