diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index 3b5f9bf3ef0..8402e629357 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -632,8 +632,6 @@ pref("browser.sessionstore.postdata", 0);
 pref("browser.sessionstore.privacy_level", 1);
 // how many tabs can be reopened (per window)
 pref("browser.sessionstore.max_tabs_undo", 10);
-// maximum number of pages of back-history per tab to save
-pref("browser.sessionstore.max_tab_back_history", 10);
 
 // allow META refresh by default
 pref("accessibility.blockautorefresh", false);
diff --git a/browser/components/sessionstore/src/nsSessionStore.js b/browser/components/sessionstore/src/nsSessionStore.js
index ddb10fc4663..373b30cdb36 100644
--- a/browser/components/sessionstore/src/nsSessionStore.js
+++ b/browser/components/sessionstore/src/nsSessionStore.js
@@ -895,14 +895,10 @@ SessionStoreService.prototype = {
       tabData.index = history.index + 1;
     }
     else if (history && history.count > 0) {
-      // Cap the number of back history entries saved. (-1 = no cap)
-      var cap = this._prefBranch.getIntPref("sessionstore.max_tab_back_history");
-
-      var startIndex = -1 < cap && cap < history.index ? history.index - cap : 0;
-      for (var j = startIndex; j < history.count; j++)
+      for (var j = 0; j < history.count; j++)
         tabData.entries.push(this._serializeHistoryEntry(history.getEntryAtIndex(j, false),
                                                          aFullData));
-      tabData.index = history.index - startIndex + 1;
+      tabData.index = history.index + 1;
 
       // make sure not to cache privacy sensitive data which shouldn't get out
       if (!aFullData)