diff --git a/modules/features/niri.nix b/modules/features/niri.nix
index 90f6f9a..8147cc3 100644
--- a/modules/features/niri.nix
+++ b/modules/features/niri.nix
@@ -23,11 +23,11 @@
         wallpaper-destinations = [ "Pictures/Wallpapers" ];
 
         xdg.mime.defaultApplications = {
-          "text/html" = "librewolf";
-          "x-scheme-handler/http" = "librewolf";
-          "x-scheme-handler/https" = "librewolf";
-          "x-scheme-handler/about" = "librewolf";
-          "x-scheme-handler/unknown" = "librewolf";
+          "text/html" = "helium";
+          "x-scheme-handler/http" = "helium";
+          "x-scheme-handler/https" = "helium";
+          "x-scheme-handler/about" = "helium";
+          "x-scheme-handler/unknown" = "helium";
         };
       };
     };
@@ -56,8 +56,8 @@
           };
 
           input.touchpad = {
-            tap = {};
-            natural-scroll = {};
+            tap = { };
+            natural-scroll = { };
           };
 
           "output \"eDP-1\"" = {
@@ -75,7 +75,9 @@
 
           binds = {
             "Mod+R".spawn-sh = "${lib.getExe self'.packages.myNoctalia} ipc call launcher toggle";
-            "Mod+Shift+W".spawn-sh = "librewolf";
+            "Mod+Shift+W".spawn-sh =
+              lib.getExe
+                inputs.helium.packages.${pkgs.stdenv.hostPlatform.system}.default;
             "Mod+Return".spawn-sh = lib.getExe self'.packages.kitty;
             "Mod+Shift+C".close-window = null;
 
@@ -117,6 +119,7 @@
               matches = [
                 { app-id = "zed"; }
                 { app-id = "librewolf"; }
+                { app-id = "helium"; }
                 { app-id = "vesktop"; }
               ];
               default-column-width = {
@@ -137,6 +140,21 @@
                 };
               };
             }
+            {
+              # picture-in-picture support for helium
+              matches = [
+                # Since App ID is empty, we target the title specifically.
+                # Using regex ^...$ ensures an exact match.
+                { title = "^Picture in picture$"; }
+              ];
+              default-floating-position = {
+                _attrs = {
+                  x = 10;
+                  y = 10;
+                  relative-to = "bottom-right";
+                };
+              };
+            }
           ];
 
           workspaces = {
diff --git a/modules/hosts/desktop/configuration.nix b/modules/hosts/desktop/configuration.nix
index 6e7e5c3..78123db 100644
--- a/modules/hosts/desktop/configuration.nix
+++ b/modules/hosts/desktop/configuration.nix
@@ -14,6 +14,7 @@
         self.nixosModules.contentCreation
         self.nixosModules.communications
         # self.nixosModules.hyprland-noctalia
+        self.nixosModules.helium
         self.nixosModules.librewolf
         self.nixosModules.user
       ];
@@ -35,6 +36,7 @@
         pavucontrol
         keepassxc
         amberol
+        gelly
         chromium
         (element-desktop.override {
           commandLineArgs = "--password-store=gnome-libsecret";