Safari won’t shut down

I started my MacBook Pro today, while it was loading I went and did a few things. When I came back to the computer it was downloading something. When it was done safari was opening, when it finished I tried to quit out of Safari. It wouldn’t let me quit out, so I force quit safari. When I click on force quit safari blinks and comes right back again. I couldn’t shut the computer down because safari wouldn’t quit. I got fed up and held the power button down to force shutdown the computer. When it started I shut down again. After a few minutes Safari started back up and I can’t quit out of it again.

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