diff --git a/.changeset/forty-mails-roll.md b/.changeset/forty-mails-roll.md
new file mode 100644
index 0000000000..088ab2ce83
--- /dev/null
+++ b/.changeset/forty-mails-roll.md
@@ -0,0 +1,5 @@
+---
+'slate-react': patch
+---
+
+Fixed text insertion logic to prevent crashing in newer Firefox versions.
diff --git a/packages/slate-react/src/components/editable.tsx b/packages/slate-react/src/components/editable.tsx
index f2a8a22faf..e08d2ebd5d 100644
--- a/packages/slate-react/src/components/editable.tsx
+++ b/packages/slate-react/src/components/editable.tsx
@@ -18,6 +18,7 @@ import useChildren from '../hooks/use-children'
 import Hotkeys from '../utils/hotkeys'
 import {
   IS_FIREFOX,
+  IS_FIREFOX_LEGACY,
   IS_SAFARI,
   IS_EDGE_LEGACY,
   IS_CHROME_LEGACY,
@@ -659,7 +660,7 @@ export const Editable = (props: EditableProps) => {
                 // aren't correct and never fire the "insertFromComposition"
                 // type that we need. So instead, insert whenever a composition
                 // ends since it will already have been committed to the DOM.
-                if (!IS_SAFARI && !IS_FIREFOX && event.data) {
+                if (!IS_SAFARI && !IS_FIREFOX_LEGACY && event.data) {
                   Editor.insertText(editor, event.data)
                 }
               }