diff --git a/pkgs/applications/networking/browsers/librewolf/default.nix b/pkgs/applications/networking/browsers/librewolf/default.nix
index 49f48db6858f..1d1575090deb 100644
--- a/pkgs/applications/networking/browsers/librewolf/default.nix
+++ b/pkgs/applications/networking/browsers/librewolf/default.nix
@@ -10,6 +10,7 @@ in
   version = librewolf-src.packageVersion;
   src = librewolf-src.firefox;
   requireSigning = false;
+  allowAddonSideload = true;
   inherit (librewolf-src) extraConfigureFlags extraPatches extraPostPatch extraPassthru;
 
   meta = {