--- a/browser/components/sessionstore/SessionStore.jsm
+++ b/browser/components/sessionstore/SessionStore.jsm
@@ -383,17 +383,17 @@ this.SessionStore = {
    *        The browser state for which we remove worth-saving tabs.
    *        The given object will be modified.
    */
   keepOnlyWorthSavingTabs: function (aState) {
     for (let i = aState.windows.length - 1; i >= 0; i--) {
       let win = aState.windows[i];
       for (let j = win.tabs.length - 1; j >= 0; j--) {
         let tab = win.tabs[j];
-        if (!SessionStoreInternal._shouldSaveTabState(tab)) {
+        if (!SessionStoreInternal._shouldSaveTab(tab)) {
           win.tabs.splice(j, 1);
           if (win.selected > j) {
             win.selected--;
           }
         }
       }
       if (!win.tabs.length) {
         aState.windows.splice(i, 1);
@@ -4193,21 +4193,40 @@ var SessionStoreInternal = {
   _shouldSaveTabState: function ssi_shouldSaveTabState(aTabState) {
     // If the tab has only a transient about: history entry, no other
     // session history, and no userTypedValue, then we don't actually want to
     // store this tab's data.
     return aTabState.entries.length &&
            !(aTabState.entries.length == 1 &&
                 (aTabState.entries[0].url == "about:blank" ||
                  aTabState.entries[0].url == "about:newtab" ||
+                 aTabState.entries[0].url == "about:printpreview" ||
                  aTabState.entries[0].url == "about:privatebrowsing") &&
                  !aTabState.userTypedValue);
   },
 
   /**
+   * Determine if the tab state we're passed is something we should keep to be
+   * reopened at session restore. This is used when we are saving the current
+   * session state to disk. This method is very similar to _shouldSaveTabState,
+   * however, "about:blank" and "about:newtab" tabs will still be saved to disk.
+   *
+   * @param aTabState
+   *        The current tab state
+   * @returns boolean
+   */
+  _shouldSaveTab: function ssi_shouldSaveTab(aTabState) {
+    // If the tab has one of the following transient about: history entry,
+    // then we don't actually want to write this tab's data to disk.
+    return aTabState.entries.length &&
+           !(aTabState.entries[0].url == "about:printpreview" ||
+             aTabState.entries[0].url == "about:privatebrowsing");
+  },
+
+  /**
    * This is going to take a state as provided at startup (via
    * nsISessionStartup.state) and split it into 2 parts. The first part
    * (defaultState) will be a state that should still be restored at startup,
    * while the second part (state) is a state that should be saved for later.
    * defaultState will be comprised of windows with only pinned tabs, extracted
    * from state. It will contain the cookies that go along with the history
    * entries in those tabs. It will also contain window position information.
    *