macOS will pop up a window that says the system has run out of application memory, asking you to quit applications. I have a friend with, I believe a base M3 Air, who runs into this constantly with nothing but Firefox open.
(Been trying to get them to switch to Safari, but they prefer the Firefox name. I don't think there's anything wrong with Firefox other than it being less native.)
macOS will pop up a window that says the system has run out of application memory, asking you to quit applications. I have a friend with, I believe a base M3 Air, who runs into this constantly with nothing but Firefox open.
(Been trying to get them to switch to Safari, but they prefer the Firefox name. I don't think there's anything wrong with Firefox other than it being less native.)