diff --git a/src/toastify.css b/src/toastify.css
index c6fa552..59c5b7e 100644
--- a/src/toastify.css
+++ b/src/toastify.css
@@ -65,6 +65,7 @@
     left: 0;
     right: 0;
     max-width: fit-content;
+    max-width: -moz-fit-content;
 }
 
 @media only screen and (max-width: 360px) {