It says history will be deleted after about a minute of no activity on Firefox. Very vague.

1. What is no activity? If I'm streaming a radio station, is that activity? If an app is constantly going out to look for new messages or something is that activity? If I run multiple profiles, must they all be inactive?

2. I would much rather be able to
a. Turn off the automated deletion (ON/OFF, not just setting days to ZERO).
b. Have a button to manually initiate the deletion.