I will open a few tabs, then close some then open more , then everything slows down, I go to task manager and see that many tasks are still open under Firefox I want tabs to close ( end process) when I close them So now I manually 'end process' and the machine resumes speed How do I get firefox to End Process when tabs are closed this is w 8.1, don't know what version of firefox, pretty recent this is firefox mozilla, as best I understand, not that I know why these two are always paired tx