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Firefox is running even when my computer is on sleep with the lid closed and shortening my battery life considerably even when I have few windows open
I am running very high CPUs with firefox and it is keeping my computer very warm even when the lid is closed and it should be sleeping and it seems to be the reason my battery life is so short - no more than an hour or two at most.
/edit: moved thread from Firefox for iOS (for iPhone/iPad) to the (desktop) Firefox section as your Macbook has macOS
Modified