diff --git a/kitty/kitty.conf b/kitty/kitty.conf
index 69ecaf3..3410fcc 100644
--- a/kitty/kitty.conf
+++ b/kitty/kitty.conf
@@ -9,7 +9,7 @@ cursor_blink_interval         1.0
 cursor_stop_blinking_after    20.0
 cursor_shape                  underline 
 scrollback_lines              10000
-remember_window_size          no
+remember_window_size          yes
 initial_window_width          1480
 initial_window_height         1000
 draw_minimal_borders          yes
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 8c9b505..c86e834 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -53,7 +53,9 @@
     wget
     bind
     vim
-    firefox
+    #firefox
+    (firefox.override { extraNativeMessagingHosts = [ passff-host ]; })
+    brave
     xdg-desktop-portal-kde
     plasma-browser-integration
     keepassxc
@@ -87,7 +89,7 @@
     visualvm
     scala
     dotty
-    sbt
+    (sbt.override { jre = pkgs.openjdk; })
     docker
     protobuf3_9
     openssl
@@ -151,16 +153,23 @@
     tcpdump
     kdiff3
     xscreensaver
-    #(qemu.override { openGLSupport = true; })
     aqemu
     flatpak
     jq
     android-file-transfer
     pass
+    passff-host
     minikube
     yed
     pencil
     dia
+    mongodb-tools
+    meld
+    gnuplot
+    #mysql-workbench
+    #zookeeper
+    wireguard
+    wireguard-tools
   ];
 
   fonts = {
@@ -252,7 +261,13 @@
   services.xserver.desktopManager.plasma5.enable = true;
 
   # virtualisation
-  virtualisation.docker.enable = true;
+  virtualisation = {
+    docker.enable = true;
+    libvirtd = {
+      enable = true;
+      qemuPackage = pkgs.qemu_kvm;
+    };
+  };
   #virtualisation.virtualbox.host.enable = true;
   #users.extraGroups.vboxusers.members = [ "nnm" ];
 
@@ -267,7 +282,7 @@
     isNormalUser = true;
     uid = 1000;
     shell = pkgs.fish;
-    extraGroups = ["audio" "networkmanager" "wireshark" "wheel" "docker"];
+    extraGroups = ["audio" "networkmanager" "wireshark" "wheel" "docker" "kvm" "libvirtd"];
   };
 
   #services.minidlna = {
diff --git a/nixos/hardware-configuration.nix b/nixos/hardware-configuration.nix
index 83e013d..2166b3d 100644
--- a/nixos/hardware-configuration.nix
+++ b/nixos/hardware-configuration.nix
@@ -10,7 +10,7 @@
 
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];
   boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
+  boot.extraModulePackages = [ config.boot.kernelPackages.wireguard ];
   boot.cleanTmpDir = true;
 
   fileSystems."/" =
diff --git a/services/docker-compose.yml b/services/docker-compose.yml
new file mode 100644
index 0000000..b94cb17
--- /dev/null
+++ b/services/docker-compose.yml
@@ -0,0 +1,21 @@
+version: '3.1'
+services:
+  mongo:
+    container_name: mongodb
+    restart: always
+    command: ["--bind_ip_all"]
+    image: mongo:4
+    #    environment:
+    #      MONGO_INITDB_ROOT_USERNAME: root
+    #      MONGO_INITDB_ROOT_PASSWORD: root
+    ports:
+      - "27017:27017"
+    volumes:
+      - /var/db/mongodb:/data/db
+    networks:
+      - mongo
+
+networks:
+  mongo:
+    driver: bridge
+