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CPU usage spikes when computer tries to sleep

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nebular
nebular
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When my computer's screen turns off and it goes to sleep, the CPU fan spins up to high and stays that way until I interact from the computer to seemingly wake it up at which point the fans spin back down. Process explorer shows that Firefox is using a large percentage of the cpu, which is strange because the computer is completely idle and prior to the attempted sleep, firefox is using next to no cpu.

It's very frustrating because any power saving I try to get from putting my computer to sleep automatically is lost completely due to the high cpu usage.

When my computer's screen turns off and it goes to sleep, the CPU fan spins up to high and stays that way until I interact from the computer to seemingly wake it up at which point the fans spin back down. Process explorer shows that Firefox is using a large percentage of the cpu, which is strange because the computer is completely idle and prior to the attempted sleep, firefox is using next to no cpu. It's very frustrating because any power saving I try to get from putting my computer to sleep automatically is lost completely due to the high cpu usage.