diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0b3f674238..c77d4c980f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,11 @@ should change the heading of the (upcoming) version to include a major version b
 
 -->
 
+# 5.18.1
+
+## @rjsf/core
+- Fixed Programmatic submit not working properly in Firefox [#3121](https://github.com/rjsf-team/react-jsonschema-form/issues/3121)
+
 # 5.18.0
 
 ## @rjsf/antd
diff --git a/packages/core/src/components/Form.tsx b/packages/core/src/components/Form.tsx
index 31752c41e0..9addaf8c0e 100644
--- a/packages/core/src/components/Form.tsx
+++ b/packages/core/src/components/Form.tsx
@@ -758,11 +758,11 @@ export default class Form<
   /** Provides a function that can be used to programmatically submit the `Form` */
   submit = () => {
     if (this.formElement.current) {
-      this.formElement.current.dispatchEvent(
-        new CustomEvent('submit', {
-          cancelable: true,
-        })
-      );
+      const submitCustomEvent = new CustomEvent('submit', {
+        cancelable: true,
+      });
+      submitCustomEvent.preventDefault();
+      this.formElement.current.dispatchEvent(submitCustomEvent);
       this.formElement.current.requestSubmit();
     }
   };