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Since updating my iMac to Firefox ESR 52.3.0 my 1Password no longer works. Any suggestions?

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I have tried all the settings, I have updated 1Password, and I even downloaded a new version of Firefox. But 1Password works on my Safari browser, Chrome, and even Opera developer version; just not on Firefox. I am using an iMac, 24", mid 2009 model.

I have tried all the settings, I have updated 1Password, and I even downloaded a new version of Firefox. But 1Password works on my Safari browser, Chrome, and even Opera developer version; just not on Firefox. I am using an iMac, 24", mid 2009 model.

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Can I ask why you are using Firefox ESR? ESR is meant for enterprises with their own It team to support installations. Most users should be running Firefox release.

For this specific issue, I'd suggest contacting 1Password's support team.