diff --git a/systems/common/firefox.nix b/systems/common/firefox.nix
index 45e74d0..4f198d3 100644
--- a/systems/common/firefox.nix
+++ b/systems/common/firefox.nix
@@ -13,6 +13,7 @@
         sidebery
         sponsorblock
         dearrow
+        user-agent-string-switcher
       ];
 
       settings = {