diff --git a/flake.lock b/flake.lock
index f03552c..d75aec3 100644
--- a/flake.lock
+++ b/flake.lock
@@ -117,16 +117,16 @@
         ]
       },
       "locked": {
-        "lastModified": 1700814205,
-        "narHash": "sha256-lWqDPKHRbQfi+zNIivf031BUeyciVOtwCwTjyrhDB5g=",
+        "lastModified": 1699748081,
+        "narHash": "sha256-MOmMapBydd7MTjhX4eeQZzKlCABWw8W6iSHSG4OeFKE=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "aeb2232d7a32530d3448318790534d196bf9427a",
+        "rev": "04bac349d585c9df38d78e0285b780a140dc74a4",
         "type": "github"
       },
       "original": {
         "owner": "nix-community",
-        "ref": "release-23.11",
+        "ref": "release-23.05",
         "repo": "home-manager",
         "type": "github"
       }
@@ -174,11 +174,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1701656485,
-        "narHash": "sha256-xDFormrGCKKGqngHa2Bz1GTeKlFMMjLnHhTDRdMJ1hs=",
+        "lastModified": 1699701045,
+        "narHash": "sha256-mDzUXK7jNO/utInWpSWEX1NgEEunVIpJg+LyPsDTfy0=",
         "owner": "NixOS",
         "repo": "nixos-hardware",
-        "rev": "fa194fc484fd7270ab324bb985593f71102e84d1",
+        "rev": "b689465d0c5d88e158e7d76094fca08cc0223aad",
         "type": "github"
       },
       "original": {
@@ -190,11 +190,11 @@
     },
     "nixos-unstable": {
       "locked": {
-        "lastModified": 1701436327,
-        "narHash": "sha256-tRHbnoNI8SIM5O5xuxOmtSLnswEByzmnQcGGyNRjxsE=",
+        "lastModified": 1699099776,
+        "narHash": "sha256-X09iKJ27mGsGambGfkKzqvw5esP1L/Rf8H3u3fCqIiU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "91050ea1e57e50388fa87a3302ba12d188ef723a",
+        "rev": "85f1ba3e51676fa8cc604a3d863d729026a6b8eb",
         "type": "github"
       },
       "original": {
@@ -238,27 +238,27 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1701539137,
-        "narHash": "sha256-nVO/5QYpf1GwjvtpXhyxx5M3U/WN0MwBro4Lsk+9mL0=",
+        "lastModified": 1699596684,
+        "narHash": "sha256-XSXP8zjBZJBVvpNb2WmY0eW8O2ce+sVyj1T0/iBRIvg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "933d7dc155096e7575d207be6fb7792bc9f34f6d",
+        "rev": "da4024d0ead5d7820f6bd15147d3fe2a0c0cec73",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-23.11",
+        "ref": "nixos-23.05",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "nur": {
       "locked": {
-        "lastModified": 1701884762,
-        "narHash": "sha256-aAWZzKMuEq91rNO8DUh8WlcnSSsrVcB9FINfS1r/5Ic=",
+        "lastModified": 1699886661,
+        "narHash": "sha256-KSM1gEVS7pfIP+uiaJXG8Pj5k4nMqxFusuWsYtzznDY=",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "74c460412d1d4dc267e0be789584650be9638594",
+        "rev": "17e04af4f65629e4fd1094b3fe52227cdd7e8b55",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 177f80b..56baa6c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,11 +2,11 @@
   description = "NixOS system flake";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
     nixos-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
     nixos-hardware.url = "github:NixOS/nixos-hardware/master";
     home-manager = {
-      url = "github:nix-community/home-manager/release-23.11";
+      url = "github:nix-community/home-manager/release-23.05";
       inputs.nixpkgs.follows = "nixpkgs";
     };
     lanzaboote = {
diff --git a/home/home.nix b/home/home.nix
index 59fbd81..84c3d96 100644
--- a/home/home.nix
+++ b/home/home.nix
@@ -78,7 +78,8 @@ let
     yt-dlp
     #sonic-pi
     musescore
-    tenacity
+    unstable.tenacity
+    avidemux
     #linphone
     soundkonverter
   ];
@@ -119,7 +120,7 @@ let
 
   nixHelpers = [
     lorri
-    nixpkgs-review
+    nix-review
     nixpkgs-fmt
     nix-top
     statix
@@ -150,7 +151,8 @@ let
     krdc
     skanlite
     akonadiconsole
-    tokodon  # mastodon client
+    plasma-browser-integration
+    unstable.tokodon  # mastodon client
   ]
   ++ (
     with kdeFrameworks; [
@@ -253,6 +255,8 @@ in
 
   nixpkgs.overlays = (import ./overlays.nix);
   nixpkgs.config = {
+    firefox.enablePlasmaBrowserIntegration = true;
+    firefox-bin.enablePlasmaBrowserIntegration = true;
     clementine.spotify = false;
     vim =
       { gui = "gtk3";
@@ -384,7 +388,7 @@ in
     # shell config
     programs.zsh = {
       enable = true;
-      syntaxHighlighting.enable = true;
+      enableSyntaxHighlighting = true;
       history.ignoreSpace = true;
       initExtra = ''
         # Uncomment following line if you want red dots to be displayed while waiting for completion
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index d551488..b115f84 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -161,8 +161,6 @@ in
 
   # dconf required for several Gnome applications like Cawbird
   programs.dconf.enable = true;
-  
-  programs.firefox.enable = true;   # enables support for automatically setting additionsl nativeMessagingHosts
 
   # Flatpak support
   services.flatpak.enable = true;