diff --git a/hosts/common/system/configs/cpu/default.nix b/hosts/common/system/configs/cpu/default.nix
new file mode 100644
index 0000000..64eefec
--- /dev/null
+++ b/hosts/common/system/configs/cpu/default.nix
@@ -0,0 +1,4 @@
+{ ... }:
+{
+  imports = [ ./options.nix ];
+}
diff --git a/hosts/common/system/configs/cpu/options.nix b/hosts/common/system/configs/cpu/options.nix
new file mode 100644
index 0000000..ae6ebca
--- /dev/null
+++ b/hosts/common/system/configs/cpu/options.nix
@@ -0,0 +1,17 @@
+{ lib, ... }:
+{
+  options.hardware.cpu =
+    with lib;
+    with types;
+    {
+      cores = mkOption {
+        type = ints.positive;
+        description = "The number of cpu cores.";
+      };
+
+      threads = mkOption {
+        type = ints.positive;
+        description = "The number of cpu threads.";
+      };
+    };
+}
diff --git a/hosts/common/system/configs/impermanence/default.nix b/hosts/common/system/configs/impermanence/default.nix
index 462d093..4ed40ab 100644
--- a/hosts/common/system/configs/impermanence/default.nix
+++ b/hosts/common/system/configs/impermanence/default.nix
@@ -26,6 +26,7 @@
       };
     };
 
+  # uuidgen -r | tr -d -
   # https://github.com/NixOS/nixpkgs/blob/master/nixos/doc/manual/administration/systemd-state.section.md
   # https://github.com/NixOS/nixpkgs/pull/286140/files
   # https://git.eisfunke.com/config/nixos/-/blob/e65e1dc21d06d07b454005762b177ef151f8bfb6/nixos/machine-id.nix
diff --git a/hosts/common/system/configs/tlp/default.nix b/hosts/common/system/configs/tlp/default.nix
new file mode 100644
index 0000000..ea48f56
--- /dev/null
+++ b/hosts/common/system/configs/tlp/default.nix
@@ -0,0 +1,12 @@
+{ ... }:
+{
+  services.tlp = {
+    enable = true;
+    settings = {
+      CPU_SCALING_GOVERNOR_ON_AC = "performance";
+      CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
+      CPU_ENERGY_PERF_POLICY_ON_AC = "performance";
+      CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
+    };
+  };
+}
diff --git a/hosts/common/user/configs/console/yt-dlp/default.nix b/hosts/common/user/configs/console/yt-dlp/default.nix
new file mode 100644
index 0000000..62a310e
--- /dev/null
+++ b/hosts/common/user/configs/console/yt-dlp/default.nix
@@ -0,0 +1,20 @@
+{
+  user ? throw "user argument is required",
+  home ? throw "home argument is required",
+}:
+{ config, ... }:
+{
+  home-manager.users.${user}.programs.yt-dlp = {
+    enable = true;
+    settings = {
+      live-from-start = true;
+      concurrent-fragments = config.hardware.cpu.threads;
+      lazy-playlist = true;
+      cookies-from-browser = "firefox";
+      embed-subs = true;
+      sub-langs = "all,-live_chat";
+      embed-thumbnail = true;
+      fixup = "detect_or_warn";
+    };
+  };
+}
diff --git a/hosts/common/user/configs/gui/firefox/default.nix b/hosts/common/user/configs/gui/firefox/default.nix
index 918c2f8..3c4739a 100644
--- a/hosts/common/user/configs/gui/firefox/default.nix
+++ b/hosts/common/user/configs/gui/firefox/default.nix
@@ -91,13 +91,13 @@
       };
     };
 
-    xdg.mimeApps.defaultApplications = {
-      "text/html" = "firefox.desktop";
-      "x-scheme-handler/http" = "firefox.desktop";
-      "x-scheme-handler/https" = "firefox.desktop";
-      "x-scheme-handler/about" = "firefox.desktop";
-      "x-scheme-handler/unknown" = "firefox.desktop";
-    };
+    xdg.mimeApps.defaultApplications = lib.attrsets.genAttrs [
+      "text/html"
+      "x-scheme-handler/http"
+      "x-scheme-handler/https"
+      "x-scheme-handler/about"
+      "x-scheme-handler/unknown"
+    ] (_: "firefox.desktop");
 
     home.sessionVariables.DEFAULT_BROWSER = lib.meta.getExe pkgs.firefox;
 
diff --git a/hosts/eirene/base/default.nix b/hosts/eirene/base/default.nix
index 09253ee..e088f80 100644
--- a/hosts/eirene/base/default.nix
+++ b/hosts/eirene/base/default.nix
@@ -12,6 +12,7 @@
       device = "/dev/disk/by-id/nvme-SAMSUNG_MZVL22T0HBLB-00BL2_S64RNE0R602762";
     })
     ./hardware-configuration.nix
+    ../../common/system/configs/tlp
     ../.
   ];
 
@@ -19,7 +20,13 @@
 
   # https://github.com/NixOS/nixos-hardware/tree/master/lenovo/legion/16achg6
   hardware = {
-    cpu.amd.updateMicrocode = true;
+    enableAllFirmware = true;
+
+    cpu = {
+      cores = 8;
+      threads = 16;
+      amd.updateMicrocode = true;
+    };
 
     nvidia = {
       modesetting.enable = true;
@@ -45,23 +52,12 @@
         rocmPackages.clr.icd
       ];
     };
-
-    enableAllFirmware = true;
   };
 
   services = {
     xserver.videoDrivers = [ "nvidia" ];
     fstrim.enable = true;
-    tlp = {
-      enable = true;
-      settings = {
-        DISK_DEVICES = "nvme0n1 nvme1n1";
-        CPU_SCALING_GOVERNOR_ON_AC = "performance";
-        CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
-        CPU_ENERGY_PERF_POLICY_ON_AC = "performance";
-        CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
-      };
-    };
+    tlp.settings.DISK_DEVICES = "nvme0n1 nvme1n1";
   };
 
   boot = {
diff --git a/hosts/eirene/default.nix b/hosts/eirene/default.nix
index f6ceec4..6d1f99e 100644
--- a/hosts/eirene/default.nix
+++ b/hosts/eirene/default.nix
@@ -5,6 +5,7 @@
     ../common/system/configs/brightnessctl
     ../common/system/configs/btop
     ../common/system/configs/btrfs
+    ../common/system/configs/cpu
     ../common/system/configs/docker
     ../common/system/configs/fastfetch
     ../common/system/configs/getty
diff --git a/hosts/eirene/nick.nix b/hosts/eirene/nick.nix
index 616653c..f1d0a18 100644
--- a/hosts/eirene/nick.nix
+++ b/hosts/eirene/nick.nix
@@ -30,6 +30,7 @@ in
     (import ../common/user/configs/console/tree { inherit user home; })
     (import ../common/user/configs/console/wget { inherit user home; })
     (import ../common/user/configs/console/xdg { inherit user home; })
+    (import ../common/user/configs/console/yt-dlp { inherit user home; })
     (import ../common/user/configs/console/zsh { inherit user home; })
     (import ../common/user/configs/gui/ags { inherit user home; })
     (import ../common/user/configs/gui/bluetooth { inherit user home; })