Firefox Community Forum

I’m the owner of a Korean webtoon platform at https://newtoki.com.co/, and I’ve recently run into a strange, intermittent issue that only seems to happen in Firefox.

Here’s the situation:

The site loads fine most of the time, but occasionally when I (or some of my users) try to open it, Firefox throws a “Secure Connection Failed” message with an error code like SEC_ERROR_OCSP_INVALID_SIGNING_CERT or sometimes NS_ERROR_NET_RESET.

This happens randomly — sometimes on the homepage, sometimes when navigating to a category or content page.

I’ve tested in Chrome and Edge, and the site loads without any errors there.

Steps I’ve taken so far:

Cleared Firefox cache and cookies, restarted the browser — no change.

Tried in Firefox’s Troubleshoot Mode — still happens occasionally.

Contacted my hosting provider — they checked the server logs and SSL configuration and told me everything is fine on their side.

Verified my SSL certificate chain with an online checker — no obvious issues found.

Additional details:

I’m based in Korea and use the site daily for uploading and managing content.

Some users outside Korea have also reported the same error, but not consistently.

The issue started about a week ago, without any major changes to the site’s code or hosting environment.

I’m wondering if this could be related to Firefox’s OCSP stapling checks, a caching issue, or something about how my CDN is serving resources.

Has anyone seen similar behavior in Firefox with otherwise valid HTTPS sites? Any suggestions on what I can check next would be greatly appreciated.

Thank you in advance for your help!

I have tried to connect to a major grocery store (which I have many times) and I get "Problem Loading Page" and then The connection to www.frysfood.com was interrupted while the page was loading.

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Learn more…

Learn more didn't compute for me, a computer neanderthal

My DSL router is at 192.168.0.1. Every time I log in to the admin account from another 192.168 box, Firefox balks because the router uses an evil self-signed certificate from the manufacturer. Is there any way to accept the "risk" permanently? It is an impediment to productivity having to wade through banners proudly proclaiming how dangerous my router is among warning messages and do you really want to ignore our safety warnings and corrupt your system you stupid user who, after decades of experience, cannot decide for yourself if your router is clickbait full of trojans and viruses that don't work on Linux systems anyway. Go bother Windows users with such utter nonsense. I don't need your Windows safety wheels. Solution: provide a way to turn off the miasma in about:config, safely hidden from naive Windows folk, for 192.168 networks.