diff --git a/README.md b/README.md
index fdc7f2d..57db56d 100644
--- a/README.md
+++ b/README.md
@@ -257,10 +257,10 @@ without it.
 | `steamFrame.clipboardSync.package` | package | built from `dnut/clipboard-sync` | The clipboard-sync package. |
 | `steamFrame.firefox.enable` | bool | `false` | Launcher for the Flathub Firefox Flatpak with the fixes below. |
 | `steamFrame.firefox.vrFullscreenFix` | bool | `true` | Default `full-screen-api.ignore-widgets` to `true` (not in the desktop profile). |
-| `steamFrame.firefox.disableAv1` | bool | `true` | Default `media.av1.enabled` to `false`: the Frame's decoder driver has no AV1, so sites send VP9/H.264, decoded in hardware. |
+| `steamFrame.firefox.disableAv1` | bool | `false` | Default `media.av1.enabled` to `false`: the Frame's decoder driver has no AV1, so sites send VP9/H.264, decoded in hardware. |
 | `steamFrame.firefox.prefs` | attrs of bool, int or str | `{ }` | Further `about:config` default values for every profile (override the fixes too). |
 | `steamFrame.firefox.desktopProfile` | null or str | `"desktop"` | Separate profile for the nested desktop; `null`: none. |
-| `steamFrame.jellyfin.hardwareDecoding.enable` | bool | `true` if nix-flatpak installs Jellyfin Desktop, else `false` | Hardware video decoding in the Jellyfin Desktop Flatpak, see [Jellyfin](#jellyfin-hardware-decoding-jellyfinhardwaredecoding). |
+| `steamFrame.jellyfin.hardwareDecoding.enable` | bool | `false` | Hardware video decoding in the Jellyfin Desktop Flatpak, see [Jellyfin](#jellyfin-hardware-decoding-jellyfinhardwaredecoding). |
 | `steamFrame.jellyfin.hardwareDecoding.hwdec` | str | `"v4l2m2m-copy,auto-copy"` | mpv `hwdec` used instead of Jellyfin's automatic one. |
 
 Renamed options still work under their old names, with a warning:
@@ -811,7 +811,7 @@ associations keep working.
   Firefox looks frozen. `full-screen-api.ignore-widgets` makes fullscreen
   fill just the window. **Remove when** gamescope shows fullscreen X11
   windows in VR.
-- **`disableAv1`** (on by default): `media.av1.enabled = false`. The Frame's
+- **`disableAv1`**: `media.av1.enabled = false`. The Frame's
   decoder driver (`iris`) has no AV1, only H.264, HEVC and VP9, so YouTube
   and co. send VP9/H.264, decoded in hardware, instead of software AV1.
   **Remove when** a SteamOS kernel adds AV1 to `iris`.
@@ -865,10 +865,6 @@ its store path (only that one, read-only) to the sandbox. It would work for
 any libmpv app that sets `hwdec=auto*`, but only Jellyfin Desktop is set up
 here.
 
-On by default when nix-flatpak installs the app
-(`services.flatpak.packages` contains `org.jellyfin.JellyfinDesktop`);
-otherwise set `enable = true` yourself.
-
 The override goes through nix-flatpak's `services.flatpak.overrides` if
 [nix-flatpak](https://github.com/gmodena/nix-flatpak) is imported and
 enabled (merged with your own overrides there). Without it, home-manager
diff --git a/modules/firefox.nix b/modules/firefox.nix
index 388e6f7..dac7cab 100644
--- a/modules/firefox.nix
+++ b/modules/firefox.nix
@@ -134,7 +134,7 @@ in {
     };
     disableAv1 = lib.mkOption {
       type = lib.types.bool;
-      default = true;
+      default = false;
       description = ''
         Default media.av1.enabled to false: the Frame's decoder driver has no
         AV1 (H.264, HEVC, VP9 only), so sites like YouTube send VP9/H.264,
diff --git a/modules/jellyfin.nix b/modules/jellyfin.nix
index 1756d52..d4e8352 100644
--- a/modules/jellyfin.nix
+++ b/modules/jellyfin.nix
@@ -34,9 +34,7 @@ in {
   options.steamFrame.jellyfin.hardwareDecoding = {
     enable = lib.mkOption {
       type = lib.types.bool;
-      default = lib.any (p: (if builtins.isString p then p else p.appId or null) == app)
-        (config.services.flatpak.packages or [ ]);
-      defaultText = lib.literalMD "`true` if nix-flatpak installs `org.jellyfin.JellyfinDesktop` (`services.flatpak.packages`), else `false`";
+      default = false;
       description = ''
         Hardware video decoding (the Frame's V4L2 decoder) in the Jellyfin
         Desktop Flatpak: device access for the sandbox (devices=all) and an
diff --git a/template/home.nix b/template/home.nix
index 705f3e5..0ad7b02 100644
--- a/template/home.nix
+++ b/template/home.nix
@@ -54,8 +54,10 @@
   #     frameControls.enable = true;
   #   };
   #   firefox.enable = true;             # launcher for the Firefox Flatpak
-  #   # Jellyfin Desktop Flatpak: hardware video decoding is on by itself
-  #   # when nix-flatpak installs it; otherwise (gives it devices=all):
-  #   # jellyfin.hardwareDecoding.enable = true;
+  #   # the Frame has no AV1 decoder: sites send VP9/H.264 (hardware):
+  #   firefox.disableAv1 = true;
+  #   # Hardware video decoding in the Jellyfin Desktop Flatpak (install
+  #   # org.jellyfin.JellyfinDesktop yourself); gives it devices=all:
+  #   jellyfin.hardwareDecoding.enable = true;
   # };
 }