diff --git a/home/programs/firefox/default.nix b/home/programs/firefox/default.nix
index 6a00fad..7a12290 100644
--- a/home/programs/firefox/default.nix
+++ b/home/programs/firefox/default.nix
@@ -185,6 +185,16 @@
 
   programs.firefox = {
     enable = true;
+    policies = {
+      ExtensionSettings = {
+        "*".installation_mode = "blocked"; # blocks all addons except the ones specified below
+        # uBlock Origin:
+        "uBlock0@raymondhill.net" = {
+          install_url = "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi";
+          installation_mode = "force_installed";
+        };
+      };
+    };
     profiles.synchronous = {
       # extensions = with inputs.firefox-addons.packages.${pkgs.system}; [
       # ublock-origin