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Firefox is causing slow down and crashing my iMac

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  • 1 has this problem
  • Last reply by FredMcD

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After using Firefox for 30 minutes or longer Firefox slows and the cursor gets behind and jerky. Eventually will not respond and I have to reboot my iMac twice to clear the problems caused by Firefox. I have deleted all internet caches, cookies and web content. I have done the recommended delete and update. It works for a day or two and then the problem starts over again. Firefox is definitely causing a problem and I am going to have to stop using it. Safari does not have these problems. iMac OS 10.12.6, Firefox 59.0.2.

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