Fix your software and memory leaks. Firefox runs at 90% plus CPU use with one tab running Hulu streaming. All the standard responses are USELESS and do not solve the problem. Please don't waste your time suggesting resetting SMC or having too many applets running in the background. There is something really wrong with Firefox code under Mac Monterey. I have disabled the Firefox option to use the GPU. I have used software to turn off Intel Turbo Boost. I have removed Google Chrome from my system on the advice of otherson the Internet that Google Chrome Mac runs update software in the background. I created a new user as suggested by Apple Support. Made no difference. The high CPU load often causes CPU frequency throttling and NOT excess heat. This is NOT a fan problem. The fans are working as they should if the heat level rises. The CPU frequency jumps around from the normal 2.6 Ghz to as low as 1.25 Ghz, which is so slow as to totally cripple the computer. Audio gets distorted and choppy, video freezes, keyboard and mouse stop responding. This problem started when I upgraded to Mac OS 12. I am now on V12.3.1. I am out of solutions.