diff --git a/modules/programs/firefox.nix b/modules/programs/firefox.nix
index 041a1a4..09c637b 100644
--- a/modules/programs/firefox.nix
+++ b/modules/programs/firefox.nix
@@ -29,19 +29,36 @@ in
         );
       };
     };
-    setSearchEngines = mkEnableOption "firefox search engines";
+    package = mkOption {
+      type = types.package;
+      default = pkgs.firefox;
+      example = pkgs.firefox-esr;
+    };
   };
 
   config = mkIf cfg.enable {
     home-manager.users.moritz.programs.firefox = {
       enable = true;
-      policies = mkIf cfg.setSearchEngines {
-        SearchEngines = {
-          Default = "Kagi";
-          Remove = [ "Google" "Amazon.de" "Bing" ];
+      policies =
+        let
+          removeExtensions = [ "Google" "Amazon.de" "Bing" "Amazon" "Wikipedia (en)" "Wikipedia (de)" ];
+          convertName = name:
+            let
+              lower = toLower name;
+              escaped = replaceStrings [ "." ] [ "dot" ] lower;
+              sanitized = head (splitString " " escaped);
+            in
+            "${sanitized}@search.mozilla.org";
+        in
+        {
+          SearchEngines = mkIf (hasInfix "esr" cfg.package) {
+            Default = "Kagi";
+            Remove = removeExtensions;
+          };
+          ExtensionSettings = genAttrs
+            (map convertName removeExtensions)
+            (_: { installation_mode = "blocked"; });
         };
-      };
-      package = if cfg.setSearchEngines then pkgs.firefox-esr else pkgs.firefox;
       profiles."default" = {
         extraConfig = mkIf cfg.arkenfox.enable ''
           // Arkenfox user.js