# How to reference flatpak apps?

**URL:** https://forum.maboxlinux.org/t/how-to-reference-flatpak-apps/2589
**Category:** Applications
**Created:** [September 14, 2026, 2:47pm UTC](https://forum.maboxlinux.org/t/how-to-reference-flatpak-apps/2589 "2026-09-14T14:47:30Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![begtognen](https://forum.maboxlinux.org/letter_avatar_proxy/v4/letter/b/a88e57/32.png) [@begtognen](https://forum.maboxlinux.org/u/begtognen)
#### Post date: [September 14, 2026, 2:47pm UTC](https://forum.maboxlinux.org/t/how-to-reference-flatpak-apps/2589/1 "2026-09-14T14:47:30Z")

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I’d like to set a Flatpak app as the default web browser, but I don’t know how to reference it. The file is here:

/var/lib/flatpak/app

But when I try this:

net.waterfox.waterfox

I get an error:

[2] Sandbox: CanCreateUserNamespace() clone() failure: EPERM  
Gtk-Message: 09:34:07.102: Failed to load module “canberra-gtk-module”

I’m assuming I’m referencing it incorrectly.

Thanks for your help.

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### Author: ![muzqs](https://forum.maboxlinux.org/user_avatar/forum.maboxlinux.org/muzqs/32/3702_2.png) [@muzqs](https://forum.maboxlinux.org/u/muzqs)
#### Post date: [September 14, 2026, 4:13pm UTC](https://forum.maboxlinux.org/t/how-to-reference-flatpak-apps/2589/2 "2026-09-14T16:13:08Z")

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Hi @begtognen ,

Welcome to the forum. 🎊

Install libcanberra and try again.

```auto
sudo pacman -S libcanberra

```

A clean way to run a flatpak.

```auto
flatpak run net.waterfox.waterfox

```

This gives you the list of installed flatpaks with names. Thats all you need to know realy. You dont need the path `/var/lib/flatpak/app`

```auto
flatpak list 

```

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### Author: ![begtognen](https://forum.maboxlinux.org/letter_avatar_proxy/v4/letter/b/a88e57/32.png) [@begtognen](https://forum.maboxlinux.org/u/begtognen)
#### Post date: [September 14, 2026, 8:55pm UTC](https://forum.maboxlinux.org/t/how-to-reference-flatpak-apps/2589/3 "2026-09-14T20:55:20Z")

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Thanks so much, that worked perfectly.