MacBook won't sleep when Firefox is open
A recent cleanup of my MacBook Air may have deleted something it shouldn't have. My display used to go to sleep after being idle for a few minutes, regardless of what I had open. Now I have to put it to sleep manually, which is a nuisance. My Activity Monitor shows that Firefox is "preventing sleep." How do I get Firefox back to its old mild-mannered self?
A recent cleanup of my MacBook Air may have deleted something it shouldn't have. My display used to go to sleep after being idle for a few minutes, regardless of what I had open. Now I have to put it to sleep manually, which is a nuisance. My Activity Monitor shows that Firefox is "preventing sleep." How do I get Firefox back to its old mild-mannered self?