diff --git a/src/core/platform/web/function.js b/src/core/platform/web/function.js
index 152933882..f05ef923d 100644
--- a/src/core/platform/web/function.js
+++ b/src/core/platform/web/function.js
@@ -140,8 +140,9 @@ BI._.extend(BI, {
     },
 
     getMinimumFontSize: function () {
+        // not work for firefox
         const el = document.createElement('div');
-        el.style.fontSize = "0px";
+        el.style.fontSize = "1px";
         document.body.appendChild(el);
         const size = getComputedStyle(el).fontSize;
         el.remove();