diff --git a/4chan_x.user.js b/4chan_x.user.js
index a4b74be2c..89fe9fbf3 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -1223,7 +1223,7 @@
         $.before(form, link);
       }
       g.callbacks.push(this.node);
-      if (engine === 'webkit') {
+      if (/chrome/i.test(navigator.userAgent)) {
         qr.status({
           ready: true
         });
@@ -1832,7 +1832,7 @@
         reader.readAsBinaryString(reply.file);
         return;
       }
-      if (engine === 'webkit') {
+      if (/chrome/i.test(navigator.userAgent)) {
         qr.message.post(post);
         return;
       }
diff --git a/changelog b/changelog
index 6560e094b..496914583 100644
--- a/changelog
+++ b/changelog
@@ -1,4 +1,6 @@
 master
+- Mayhem
+  Fix posting on Safari.
 
 2.26.4
 - Mayhem
diff --git a/script.coffee b/script.coffee
index d2b2d593a..57b15dd6d 100644
--- a/script.coffee
+++ b/script.coffee
@@ -900,7 +900,8 @@ qr =
       $.before form, link
     g.callbacks.push @node
 
-    if engine is 'webkit'
+    # CORS is ignored for content script on Chrome, but not Safari/Oprah/Firefox.
+    if /chrome/i.test navigator.userAgent
       qr.status ready: true
     else
       iframe = $.el 'iframe',
@@ -1405,7 +1406,8 @@ qr =
       reader.readAsBinaryString reply.file
       return
 
-    if engine is 'webkit'
+    # CORS is ignored for content script on Chrome, but not Safari/Oprah/Firefox.
+    if /chrome/i.test navigator.userAgent
       qr.message.post post
       return
     qr.message.send post