diff --git a/flake.nix b/flake.nix
index b6cf73a..d7556d4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -44,6 +44,7 @@
     home-manager-config = toplevel: [
       home-manager.nixosModules.home-manager
       {
+        home-manager.backupFileExtension = "bk";
         home-manager.useGlobalPkgs = true;
         home-manager.extraSpecialArgs = {inherit inputs;};
         home-manager.users.tacocat = {
diff --git a/users/tacocat/programs/firefox.nix b/users/tacocat/programs/firefox.nix
index 7401630..32ae3dd 100644
--- a/users/tacocat/programs/firefox.nix
+++ b/users/tacocat/programs/firefox.nix
@@ -47,7 +47,6 @@
           ublock-origin
           bitwarden
           canvasblocker
-          aria2-integration
           sponsorblock
           xbrowsersync
           sidebery