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iMac updated to the latest version of Firefox and now it won't open at all.

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My iMac automatically updated to the latest version of Firefox and now Firefox won't open at all. I keep getting an error message about installing a helper tool. I tried both installing the Helper Tool and canceling (see attached image) with no success. Please advise.

Thanks! Carol Boehler cboehler2@unl.edu

My iMac automatically updated to the latest version of Firefox and now Firefox won't open at all. I keep getting an error message about installing a helper tool. I tried both installing the Helper Tool and canceling (see attached image) with no success. Please advise. Thanks! Carol Boehler cboehler2@unl.edu
Attached screenshots

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