It might not be new, but it is new to me & will help me out with various things so I figured I would post it here. In firefox you can have two webpages opened on one single tab, the pages split vertical and one page will load into the sidebar. This can be used to many things I took a screenshot and posted an example of a way it can be used to help aid you downloading movies. What you need to do is have the page you want on the left screen bookmarked and just right click it then select the option under the description box "Load this bookmark in the sidebar". After that you are good to go, you will have a page loaded on the left of your screen and can cycle through your tabs with the page staying on the screen. Something simple I know but I was unaware of this hope it helps someone here.