So if you are like me you probably are used to the little drop down arrow next to the back and forward buttons to be able to navigation back multiple pages at a time. For me this is crucial, I use this feature everyday. Well in Firefox 4.0 I discovered that they removed this little arrow. But the feature is still there. All you have to do is right click on either of the buttons and you will get the drop down menu selection for past/forward pages.