Temp-page tabs are the tabs at the bottom of the screen. As the name implies these tabs are not saved with the program. They work similar to your current browser tabs. Each Page-Tab has its own set of Temp-pages. Here are some useful tips on working with Temp-pages
Open temp-pages when you want to browse a new window
Open Temp-pages for search
Drag Temp-pages to the page-tab area if you want to save the page
Close all Temp-Pages from the Context menu (Right click in empty space of Page Tab area)
Temp-Pages are a subset of each page tab. Closing Page Tabs will close all Temp-Pages in that tab.