diff --git a/4chan_x.user.js b/4chan_x.user.js
index d6f9784c8..8988dbf16 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -5558,6 +5558,8 @@
       if (g.VIEW === 'catalog' || !Conf['Quick Reply']) {
         return;
       }
+      Misc.clearThreads("yourPosts." + g.BOARD);
+      this.syncYourPosts();
       if (Conf['Hide Original Post Form']) {
         $.addClass(doc, 'hide-original-post-form');
       }
@@ -5663,6 +5665,16 @@
         return QR.unhide();
       }
     },
+    syncYourPosts: function(yourPosts) {
+      if (yourPosts) {
+        QR.yourPosts = yourPosts;
+        return;
+      }
+      QR.yourPosts = $.get("yourPosts." + g.BOARD, {
+        threads: {}
+      });
+      return $.sync("yourPosts." + g.BOARD, QR.syncYourPosts);
+    },
     error: function(err) {
       var el;
       QR.open();
@@ -6448,7 +6460,7 @@
       return QR.ajax = $.ajax($.id('postForm').parentNode.action, callbacks, opts);
     },
     response: function(req) {
-      var ban, board, err, h1, persona, postID, reply, threadID, tmpDoc, _, _ref, _ref1;
+      var ban, board, err, h1, persona, postID, reply, threadID, tmpDoc, _, _base, _ref, _ref1;
       delete QR.ajax;
       tmpDoc = d.implementation.createHTMLDocument('');
       tmpDoc.documentElement.innerHTML = req.response;
@@ -6496,6 +6508,8 @@
       _ref1 = h1.nextSibling.textContent.match(/thread:(\d+),no:(\d+)/), _ = _ref1[0], threadID = _ref1[1], postID = _ref1[2];
       threadID = +threadID;
       postID = +postID;
+      ((_base = QR.yourPosts.threads)[threadID] || (_base[threadID] = [])).push(postID);
+      $.set("yourPosts." + g.BOARD, QR.yourPosts);
       $.event('QRPostSuccessful', {
         board: g.BOARD,
         threadID: threadID || postID,
diff --git a/src/qr.coffee b/src/qr.coffee
index 89f455e8a..b8a63795a 100644
--- a/src/qr.coffee
+++ b/src/qr.coffee
@@ -2,6 +2,9 @@ QR =
   init: ->
     return if g.VIEW is 'catalog' or !Conf['Quick Reply']
 
+    Misc.clearThreads "yourPosts.#{g.BOARD}"
+    @syncYourPosts()
+
     if Conf['Hide Original Post Form']
       $.addClass doc, 'hide-original-post-form'
 
@@ -83,6 +86,13 @@ QR =
     else
       QR.unhide()
 
+  syncYourPosts: (yourPosts) ->
+    if yourPosts
+      QR.yourPosts = yourPosts
+      return
+    QR.yourPosts = $.get "yourPosts.#{g.BOARD}", threads: {}
+    $.sync "yourPosts.#{g.BOARD}", QR.syncYourPosts
+
   error: (err) ->
     QR.open()
     if typeof err is 'string'
@@ -805,6 +815,9 @@ QR =
     threadID = +threadID
     postID   = +postID
 
+    (QR.yourPosts.threads[threadID] or= []).push postID
+    $.set "yourPosts.#{g.BOARD}", QR.yourPosts
+
     # Post/upload confirmed as successful.
     $.event 'QRPostSuccessful', {
       board: g.BOARD