Firefox Community Forum

Secure Connection Failed An error occurred during a connection to (Firefox and ALL sites) PR_CONNECT_RESET_ERROR Error code: PR_CONNECT_RESET_ERROR Help advises 'Failed to check for updates' Problem arose on upgrade to Firefox 138 Tried restart, computer reboot and reinstallation

I am not sufficiently computer literate to understand supposed help and support documents within 'Mozilla Support'

It looks like the end of 20 years of using Firefox ... Google Chrome used to submit this request

Trying to open my doctor's patient portal and I get a "Secure connection failed" Page. So I start Google Chrome and the website comes up like a charm. You people NEED TO GET THIS CR*P FIXED soon. As much as I hate to, I will make Chrome my default browser if this stuff continues for much longer.

The web page I need to access, prevented by this error trigger, is my webmail. How can I direct Firefox to ignore the error with respect to this specific message?

Please reply to ********@gmail.com. (Mod's note: email removed)

Thank you!

Godaddy proved to me my SSL certificate is active. All the other browsers allow my to access my web page except Firefox. I removed Firefox completely, rebooted my router and computer, still gives me an error message Error code: SEC_ERROR_REVOKED_CERTIFICATE

So what's going on? If Firefox is not going to I will use another search engine. I have been using Firefox for several years without problems.

Can you fix it?

My phone is (508) 837-8407 My web URL is www.escallonweb.com email: escallon@aol.com

I can not access my email account . I get this message ...

   An error occurred during a connection to login.gmx.com. PR_CONNECT_RESET_ER

As I follow the instructions and get to the scan my PC bar code on the PC screen with my cell phone it causes the computer to respond which is only to give me an error that the PC is not paring or just sits on the same screen with nothing basically on it.

Recently when I try to use the PCH.com search in their emails, I get this message; "HTTP Error 400. The size of the request headers is too long." Is this a PCH problem or Firefox and can I fix it?

This 404 Not Found message only started happening about 4 weeks ago on my Imac. I can't search anything without getting this message. Very frustrating. and I have to go to Google and have no problems Any ideas? Mozilla/Firefox Program up to date

view-source:resource://nimbus/lib/RemoteSettingsExperimentLoader.sys.mjs

This is making multiple "WARNING"s to appear. I believe that it is causing my DELL to shut down arbitrarily. How do I delete this ?

Dear Community,

Would be most grateful for any replies to this post.

Today, I have tried to get into my Outlook e-mail. I usually use Firefox to get into it. But I tried, but the system kept giving me the attached error message - internal service error 500. Strange thing about this was, when I tried to get into my e-mail using my phone, it worked. I then used the library computer, and that worked, too. I tried my laptop again, but this time went into the DuckDuckGo browser. It worked with this.

I therefore assume that the Firefox browser may be the problem.

Can anybody suggest a workaround? Have attached a screenshot of the problem, and the error message that I get, Marek Wesolowski

Why does Firefox intermittently fail to connect to the Newsmax website? I get a Secure Connection Failed message. It happens only occasionally, but enough to be an annoyance. What's the problem and how do I resolve it?

Hello Firefox Community,

I'm experiencing a strange issue with my website, https://www.hostgrap.com.

When I visit the site using Firefox, I get the following error:

Bad gateway Error code 502 Visit cloudflare.com for more information. 2025-05-14 04:02:47 UTC

Browser: Working Cloudflare: Working Host: Error

However, the same website works perfectly fine on other browsers like Chrome, Edge, and Safari.

Troubleshooting steps I’ve tried in Firefox:

Cleared cache and cookies Disabled all extensions Cleared DNS and HTTP cache via about:networking Checked proxy settings (set to system default) Tried Private Window Flushed system DNS Updated Firefox to the latest version

None of the above resolved the issue. The error appears consistently only in Firefox. I’m using Cloudflare for DNS and reverse proxy, and the server is working as expected for all other users/browsers.

Additional Info:

OS: Windows 10 Home Single Language Firefox Version: 138.0.3

This issue happens even after disabling all add-ons

No custom rules in Cloudflare specifically targeting Firefox or its user agent

Is there something Firefox-specific that could be triggering this behavior with Cloudflare or my server?

Thanks in advance!