1 files changed, 4 insertions, 3 deletions
diff --git a/toolkit/components/satchel/FormHistoryChild.sys.mjs b/toolkit/components/satchel/FormHistoryChild.sys.mjs
index 242d8f2e29..e97b5238e8 100644
--- a/toolkit/components/satchel/FormHistoryChild.sys.mjs
+++ b/toolkit/components/satchel/FormHistoryChild.sys.mjs
@@ -35,15 +35,16 @@ function log(message) {
 export class FormHistoryChild extends JSWindowActorChild {
   handleEvent(event) {
     switch (event.type) {
-      case "DOMFormBeforeSubmit":
-        this.#onDOMFormBeforeSubmit(event.target);
+      case "form-submission-detected":
+        this.#onFormSubmission(event);
         break;
       default:
         throw new Error("Unexpected event");
     }
   }
 
-  #onDOMFormBeforeSubmit(form) {
+  #onFormSubmission(event) {
+    const form = event.detail.form;
     if (
       !lazy.gEnabled ||
       lazy.PrivateBrowsingUtils.isContentWindowPrivate(form.ownerGlobal)