diff --git a/users/kat/gui/firefox/default.nix b/users/kat/gui/firefox/default.nix
index 98113ec5..c4c0abd0 100644
--- a/users/kat/gui/firefox/default.nix
+++ b/users/kat/gui/firefox/default.nix
@@ -42,6 +42,7 @@ in
       terms-of-service-didnt-read
       #tree-style-tab
       sidebery
+      multi-account-containers
       ublock-origin
       violentmonkey
     ];