diff --git a/common/helix/languages.toml b/common/helix/languages.toml
index b537d32..72ff30e 100644
--- a/common/helix/languages.toml
+++ b/common/helix/languages.toml
@@ -6,6 +6,11 @@ auto-format = true
 name = "html"
 auto-format = false
 
+[[language]]
+name = "nix"
+auto-format = true
+formatter = { command = "nixpkgs-fmt", args = [] }
+
 [[language]]
 name = "fish"
 auto-format = true
diff --git a/os/linux/nix/daniel.nix b/os/linux/nix/daniel.nix
index ae5a025..e45d251 100644
--- a/os/linux/nix/daniel.nix
+++ b/os/linux/nix/daniel.nix
@@ -5,9 +5,54 @@
 
   programs.home-manager.enable = true;
 
-  # TODO: firefox with userchrome
+  programs.firefox = {
+    enable = true;
+
+    package = (pkgs.firefox.override { extraNativeMessagingHosts = [ pkgs.passff-host ]; });
+
+    # extensions = with pkgs.nur.repos.rycee.firefox-addons; [
+    #   ublock-origin
+    # ];
+
+    profiles = {
+      daniel = {
+        id = 0;
+        settings = {
+          "general.smoothScroll" = true;
+        };
+
+        extraConfig = ''
+          user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
+          user_pref("full-screen-api.ignore-widgets", true);
+          user_pref("media.ffmpeg.vaapi.enabled", true);
+          user_pref("media.rdd-vpx.enabled", true);
+        '';
+
+        userChrome = ''
+          /* Remove close button*/ .titlebar-buttonbox-container{ display:none } 
+
+          #webrtcIndicator {
+          	display: none;
+          }
+
+          #main-window[tabsintitlebar="true"]:not([extradragspace="true"]) #TabsToolbar>.toolbar-items {
+          	opacity: 0;
+          	pointer-events: none;
+          }
+
+          #main-window:not([tabsintitlebar="true"]) #TabsToolbar {
+          	visibility: collapse !important;
+          } 
+        '';
+
+        # userContent = ''
+        # '';
+      };
+
+    };
+  };
 
   # wayland.windowManager.sway = {
   #   enable = true;
   # };
-}
\ No newline at end of file
+}
diff --git a/os/linux/nix/machines/thinker.nix b/os/linux/nix/machines/thinker.nix
index f9b1d59..b26bd4e 100644
--- a/os/linux/nix/machines/thinker.nix
+++ b/os/linux/nix/machines/thinker.nix
@@ -17,6 +17,8 @@ let
     '';
   };
 
+  # TODO: hibernation?
+
   # TODO: fonts? right now, I'm just installing to ~/.local/share/fonts
 
   configure-gtk = pkgs.writeTextFile {
@@ -163,6 +165,8 @@ in {
     mosh
     nmap
     nnn
+    nil
+    nixpkgs-fmt
     noto-fonts
     pamixer
     (pass.withExtensions (exts: [ exts.pass-otp ]))