diff --git a/browser/base/content/tabbrowser.xml b/browser/base/content/tabbrowser.xml
index 89500c50e600..057e1ff3e51f 100644
--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -1372,15 +1372,19 @@
             // aReferrerURI is null or undefined if the tab is opened from
             // an external application or bookmark, i.e. somewhere other
             // than the current tab.
-            if ((aRelatedToCurrent == null ? aReferrerURI : aRelatedToCurrent) &&
-                Services.prefs.getBoolPref("browser.tabs.insertRelatedAfterCurrent")) {
+            if (aRelatedToCurrent == null ? aReferrerURI : aRelatedToCurrent) {
               let newTabPos = (this._lastRelatedTab ||
                                this.selectedTab)._tPos + 1;
+
               if (this._lastRelatedTab)
                 this._lastRelatedTab.owner = null;
               else
                 t.owner = this.selectedTab;
-              this.moveTabTo(t, newTabPos);
+
+              if (!this.selectedTab.pinned &&
+                  Services.prefs.getBoolPref("browser.tabs.insertRelatedAfterCurrent"))
+                this.moveTabTo(t, newTabPos);
+
               this._lastRelatedTab = t;
             }
 
diff --git a/browser/base/content/test/browser_relatedTabs.js b/browser/base/content/test/browser_relatedTabs.js
index 893f16570550..e08291ba0315 100644
--- a/browser/base/content/test/browser_relatedTabs.js
+++ b/browser/base/content/test/browser_relatedTabs.js
@@ -78,5 +78,14 @@ function test() {
   testPosition(7, 8, "blank tab without referrer opens at the end");
   testPosition(8, 9, "tab without referrer opens at the end");
 
+  gBrowser.selectedTab = tabs[0];
+  gBrowser.pinTab(gBrowser.selectedTab);
+  addTab("http://mochi.test:8888/#8", gBrowser.currentURI);
+  testPosition(9, 10, "tab with referrer should open at the end when the selected tab is pinned");
+  gBrowser.selectedTab = tabs[9];
+  gBrowser.removeTab(tabs.pop());
+  is(gBrowser.selectedTab, tabs[0],
+     "opening a tab from a pinned tab, selecting it and closing it should go back to the pinned tab");
+
   tabs.forEach(gBrowser.removeTab, gBrowser);
 }