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Certificate error after router restart

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I currently use firefox 133 (32 bit) on Windows 11. Every time my router resets (either due to power outage or xfinity server outage) firefox fails to connect to multiple websites after internet service resumes, for example, I cant get to twitter.com (x.com) or even the mozilla support page while on firefox. Screenshots of the error and associated stuff are in the attachments. Firefox currently can't even check for updates.

All the webpages that do not work firefox due to the issues highlighted in the screenshots load perfectly fine in other browsers like chrome and edge. These issues in firefox go away after a couple days without any intervention which I explains how I was able to use firefox for these webpages prior to my last network outage and have still not been able to solve this post network-outage issue.

Things I have tried so far: - Disabling proxy in firefox: Did not work so I re-enabled it since that is how it was before the issues happened. - Re-install firefox 133: Downloaded an installer from chrome to do this but this also did not fix the issue. Note that I first downloaded the mini installer which downloads files as part of the installation and that also failed to connect to mozilla. So I downloaded the full installer. - Cleared cookies and data: did not work - DNS over HTTPS: Swicthed it off, did it did not work, so I switched back to the default setting. - Logged in to the router from firefox using the router's IP address: Not sure why I thought this would work but it did not.

Any help would be appreciated to solve this issue once and for all.

I currently use firefox 133 (32 bit) on Windows 11. Every time my router resets (either due to power outage or xfinity server outage) firefox fails to connect to multiple websites after internet service resumes, for example, I cant get to twitter.com (x.com) or even the mozilla support page while on firefox. Screenshots of the error and associated stuff are in the attachments. Firefox currently can't even check for updates. All the webpages that do not work firefox due to the issues highlighted in the screenshots load perfectly fine in other browsers like chrome and edge. These issues in firefox go away after a couple days without any intervention which I explains how I was able to use firefox for these webpages prior to my last network outage and have still not been able to solve this post network-outage issue. Things I have tried so far: - Disabling proxy in firefox: Did not work so I re-enabled it since that is how it was before the issues happened. - Re-install firefox 133: Downloaded an installer from chrome to do this but this also did not fix the issue. Note that I first downloaded the mini installer which downloads files as part of the installation and that also failed to connect to mozilla. So I downloaded the full installer. - Cleared cookies and data: did not work - DNS over HTTPS: Swicthed it off, did it did not work, so I switched back to the default setting. - Logged in to the router from firefox using the router's IP address: Not sure why I thought this would work but it did not. Any help would be appreciated to solve this issue once and for all.
Ama-screenshot ananyekiwe

Isisombululo esikhethiwe

Vipul Sharma said

jscher2000 - Support Volunteer said

It went straight through? Hmm, I'm puzzled why the router is blocking connections selectively. If you create an exception for http://example.com/ (click the Advanced button on the error page, then add an exception), does it go straight to the site or does the router show any messages?

Do you want me to go to https or http? The latter does not result in an error page

So under DNS over HTTPS setting in the setting menu I switched to Max Protection and that seemed to have fixed everything.

Funda le mpendulo ngokuhambisana nalesi sihloko 👍 0

All Replies (18)

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Are you using WiFi? One possible reason for a router to intercept your attempted connections is to require you to authenticate, although you normally would only see that as a guest, such as a coffee shop customer or at the airport. As a test, try loading a non-secure address by using http:// explicitly. For example:

http://example.com

Do you get any messages from the router when you use http rather than https?

As a note, when you sign into your router to manage it, you probably need to use the Advanced button to create an exception because it is a self-signed certificate.

Helpful?

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Why are you not using Firefox site to download the latest FF version and instead using Chrome? This is probably where the problem is coming form. Firefox has their own site to download the lastest FF. I think first you need to get FF from Firefox site and try again. And make sure your Router itself is working and has lastest firmware.

https://archive.mozilla.org/pub/firefox/releases/

Scroll to latest and click the correct 32 or 64 version and then check to get the right language version to install.

Helpful?

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markwarner22 said

Why are you not using Firefox site to download the latest FF version and instead using Chrome? This is probably where the problem is coming form. Firefox has their own site to download the lastest FF. I think first you need to get FF from Firefox site and try again. And make sure your Router itself is working and has lastest firmware. https://archive.mozilla.org/pub/firefox/releases/ Scroll to latest and click the correct 32 or 64 version and then check to get the right language version to install.

When I said I used chrome, I meant I used chrome browser to navigate to the Firefox site download the installer. I did this because I cannot get to any firefox website related pages through the firefox browser as I mentioned in my question. You can't even get the firefox installer form the chrome website

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jscher2000 - Support Volunteer said

Are you using WiFi? One possible reason for a router to intercept your attempted connections is to require you to authenticate, although you normally would only see that as a guest, such as a coffee shop customer or at the airport. As a test, try loading a non-secure address by using http:// explicitly. For example: http://example.com Do you get any messages from the router when you use http rather than https? As a note, when you sign into your router to manage it, you probably need to use the Advanced button to create an exception because it is a self-signed certificate.

I am on wifi although it is my home private network. http vs https made no difference, I get the same error message. There is no advanced option when I log in to my router. Did you meant advanced in router settings?

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Sorry about that. "markwarner22" doesn't seem to have understood the scenario. Let me know what happens with http:// addresses.

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jscher2000 - Support Volunteer said

Sorry about that. "markwarner22" doesn't seem to have understood the scenario. Let me know what happens with http:// addresses.

Same error with http addresses.

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Vipul Sharma said

jscher2000 - Support Volunteer said

Sorry about that. "markwarner22" doesn't seem to have understood the scenario. Let me know what happens with http:// addresses.

Same error with http addresses.

I guess either Firefox, your router, or an add-on is redirecting to https, because you can't get a secure connection error for an http:// address like http://example.com/.

Is your browsing in Chrome proxied by your router? You could check the certificate for a secure site you're visiting to make sure you are connecting directly and not being filtered by your router.

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jscher2000 - Support Volunteer said

Vipul Sharma said

jscher2000 - Support Volunteer said

Sorry about that. "markwarner22" doesn't seem to have understood the scenario. Let me know what happens with http:// addresses.

Same error with http addresses.

I guess either Firefox, your router, or an add-on is redirecting to https, because you can't get a secure connection error for an http:// address like http://example.com/.

Is your browsing in Chrome proxied by your router? You could check the certificate for a secure site you're visiting to make sure you are connecting directly and not being filtered by your router.

How do I check in the certificate whether its proxied by my router?

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In Chrome or Edge, I think you can check the certificate by clicking the lock icon in the address bar on the page. Google sites are generally verified with Google certs. For this site, I'm currently seeing a "Let's Encrypt" cert.

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jscher2000 - Support Volunteer said

In Chrome or Edge, I think you can check the certificate by clicking the lock icon in the address bar on the page. Google sites are generally verified with Google certs. For this site, I'm currently seeing a "Let's Encrypt" cert.

Thats what I see as well. For reddit I see digicert

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Okay, I still think it's some kind of authentication screen, but you need to hit an http:// address that doesn't redirect to https:// in order to get that screen.

How about this link:

http://forums.mozillazine.org/

(The site doesn't redirect to https://)

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jscher2000 - Support Volunteer said

Okay, I still think it's some kind of authentication screen, but you need to hit an http:// address that doesn't redirect to https:// in order to get that screen. How about this link: http://forums.mozillazine.org/ (The site doesn't redirect to https://)

This link works.

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It went straight through? Hmm, I'm puzzled why the router is blocking connections selectively.

If you create an exception for http://example.com/ (click the Advanced button on the error page, then add an exception), does it go straight to the site or does the router show any messages?

Helpful?

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jscher2000 - Support Volunteer said

It went straight through? Hmm, I'm puzzled why the router is blocking connections selectively. If you create an exception for http://example.com/ (click the Advanced button on the error page, then add an exception), does it go straight to the site or does the router show any messages?

Do you want me to go to https or http? The latter does not result in an error page

Helpful?

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Isisombululo Esikhethiwe

Vipul Sharma said

jscher2000 - Support Volunteer said

It went straight through? Hmm, I'm puzzled why the router is blocking connections selectively. If you create an exception for http://example.com/ (click the Advanced button on the error page, then add an exception), does it go straight to the site or does the router show any messages?

Do you want me to go to https or http? The latter does not result in an error page

So under DNS over HTTPS setting in the setting menu I switched to Max Protection and that seemed to have fixed everything.

Helpful?

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Vipul Sharma said

Vipul Sharma said

jscher2000 - Support Volunteer said

It went straight through? Hmm, I'm puzzled why the router is blocking connections selectively. If you create an exception for http://example.com/ (click the Advanced button on the error page, then add an exception), does it go straight to the site or does the router show any messages?

Do you want me to go to https or http? The latter does not result in an error page

So under DNS over HTTPS setting in the setting menu I switched to Max Protection and that seemed to have fixed everything.

Thanks for all your help jscher2000

Helpful?

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Thank you for reporting back. Are you using Cloudflare now, or a different DNS over HTTPS provider?

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jscher2000 - Support Volunteer said

Thank you for reporting back. Are you using Cloudflare now, or a different DNS over HTTPS provider?

I am using Cloudfare which was the default

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Buza umbuzo

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