add UI for the browser.startup.page preference, so there's a simple way to tell Firefox to start with a blank page (or, for that matter, with your windows and tabs from last time, i.e. session restore)

bug=346044
r=mconnor
r=jwalden

browser/themes/gnomestripe/browser/preferences/preferences.css

@@ -93,7 +93,7 @@ radio[pane=paneAdvanced]:hover, radio[pane=paneAdvanced][selected="true"] {
 }
 
 /* General Pane */
-#browserStartupHomepage {
+#browserHomePage {
   padding-top: 2px;
   padding-bottom: 3px;
   -moz-padding-start: 4px;