What is the difference between TooManyTabs tab (TMT tab) and a Firefox tab (FF tab)?

TooManyTabs help you to save CPU time and memory. When a tab is stored in TooManyTabs, the following will happen:

The page is unloaded and the script will stop running (in contrast with a normal tab); Tab History and scroll position are remembered;When TMT tab is open again, the web page will load from disk cache if it is available. Tab history and scroll position are also restored. (*Only for unpinned tabs)