diff --git a/configuration.nix b/configuration.nix
index 8f4ad5c..4a8c8a6 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -93,7 +93,10 @@
   };
 
   # Install firefox.
-  programs.firefox.enable = true;
+  programs.firefox = {
+    enable = true;
+    package = pkgs.firefox-esr;
+  };
 
   # Allow unfree packages
   nixpkgs.config.allowUnfree = true;
@@ -101,9 +104,9 @@
   # List packages installed in system profile. To search, run:
   # $ nix search wget
   environment.systemPackages = with pkgs; [
-  #  vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
-  #  wget
     git
+    chromium
+    onlyoffice-desktopeditors
   ];
 
   # Some programs need SUID wrappers, can be configured further or are