1 files changed, 0 insertions, 12 deletions
diff --git a/browser/base/content/tabbrowser.js b/browser/base/content/tabbrowser.js
index f56e1f0a01..678e923d5c 100644
--- a/browser/base/content/tabbrowser.js
+++ b/browser/base/content/tabbrowser.js
@@ -2128,18 +2128,6 @@
       // doesn't keep the window alive.
       b.permanentKey = new (Cu.getGlobalForObject(Services).Object)();
 
-      // Ensure that SessionStore has flushed any session history state from the
-      // content process before we this browser's remoteness.
-      if (!Services.appinfo.sessionHistoryInParent) {
-        b.prepareToChangeRemoteness = () =>
-          SessionStore.prepareToChangeRemoteness(b);
-        b.afterChangeRemoteness = switchId => {
-          let tab = this.getTabForBrowser(b);
-          SessionStore.finishTabRemotenessChange(tab, switchId);
-          return true;
-        };
-      }
-
       const defaultBrowserAttributes = {
         contextmenu: "contentAreaContextMenu",
         message: "true",