# FirefoxPWA: DRM not working when launched thru .desktop entry

**URL:** https://discourse.nixos.org/t/firefoxpwa-drm-not-working-when-launched-thru-desktop-entry/79371
**Category:** Help
**Created:** [August 6, 2026, 9:28am UTC](https://discourse.nixos.org/t/firefoxpwa-drm-not-working-when-launched-thru-desktop-entry/79371 "2026-08-06T09:28:50Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![BertP](https://discourse.nixos.org/user_avatar/discourse.nixos.org/bertp/32/31616_2.png) [@BertP](https://discourse.nixos.org/u/BertP)
#### Post date: [August 6, 2026, 8:52pm UTC](https://discourse.nixos.org/t/firefoxpwa-drm-not-working-when-launched-thru-desktop-entry/79371/2 "2026-08-06T20:52:45Z")

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Ran into this issue too. This symptom has been reported already with an issue ([firefoxpwa: Error no decoder found for audio/mp4a-latm · Issue #505426 · NixOS/nixpkgs · GitHub](https://github.com/NixOS/nixpkgs/issues/505426)). The proposed solution still works with the latest nixos-unstable commit.

I looked into firefox/firefox-unwrapped/wrapper but today is my first time working with firefoxpwa so I’ve not gathered enough understanding yet for a proper fix.

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_[View the full topic](https://discourse.nixos.org/t/firefoxpwa-drm-not-working-when-launched-thru-desktop-entry/79371)._