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firefox is crashing my pc using 100% of my proccessing how do I fix this

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Firefox is using too much of my Pcs proccessing power and causing my pc to freeze. The videos Im watching and twitch will just freeze then I have to hard reset my pc because the windows option to shut down or restart will do nothing. Even when I hit window+ctrl+shift+b to reset my graphics card it does nothing. please help me or I will have to stop using firefox which Ive been using for 20 years.

Firefox is using too much of my Pcs proccessing power and causing my pc to freeze. The videos Im watching and twitch will just freeze then I have to hard reset my pc because the windows option to shut down or restart will do nothing. Even when I hit window+ctrl+shift+b to reset my graphics card it does nothing. please help me or I will have to stop using firefox which Ive been using for 20 years.

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