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I own a website that has an SSL which firefox flags as not secure. Chrome and Edge work perfectly and this is causing me to lose business.

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I own a domain hosted by BlueHost. I've set up my SSL which works fine with Chrome and Edge. For some reason Firefox (even a new install) flags my site as not secure and is driving customers away. I've worked with the Bluehost technical support and everything seems fine on their end. What do I need to do to get this issue resolved?

I own a domain hosted by BlueHost. I've set up my SSL which works fine with Chrome and Edge. For some reason Firefox (even a new install) flags my site as not secure and is driving customers away. I've worked with the Bluehost technical support and everything seems fine on their end. What do I need to do to get this issue resolved?
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hi, your site is not providing the proper intermediate certificates that links your certificate to a certificate authority that is trusted in the browser, which you can see if you run your site through https://www.ssllabs.com/ssltest/ ("chain issues: incomplete"). you should contact the support of where you bought that ssl certificate from for proper installation instructions or your hoster to get that resolved.

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Hopefully BlueHost lets you take care of this through your control panel, but if needed, Comodo has a page here with detailed instructions for Nginx sites:

https://support.comodo.com/index.php?/Knowledgebase/Article/View/1091/0/certificate-installation--nginx