Why doesn't the public part of the site open in FF?

Question

Prestashop

The public part of the site running prestashop 1.6 opens in all browsers except FF, it allows you to access the admin panel. I tried on the phone, from a different IP - everything is fine, I tried to log in via FF on another machine - everything is fine. Cleared cache, cookies, restarted, rebooted, returns 502 Bad Gateway.

Answer 1

502 is a frontend error when accessing the backend, look in the frontend logs for what happens when accessing FF.