பயர்பாக்ஸ் Community Forum

Beginning today, I suddenly cannot access numerous websites when I use Mozilla Firefox 151.0.2. Examples include Amazon, and Google, et al. Attempts to do so consistently fail at the point of performing a TLS handshake, when I am advised that "secure connection failed". Kindly refer to the attached screenshots. I have no difficulty whatsoever accessing the same websites when I use other browsers, such as Google Chrome and MS Edge. I previously had Mozilla Firefox enabled as my default browser, but I have had to change this, given these "challenges". Please advise how I can fix this. Best regards and many thanks.

Hi!

We have a intranet site that works in Edge and Chrome without issues with the site added to "internet options". But for some reason we are getting 401 Unauthorized when trying to access it from Firefox. I have tried adding the urls to: network.automatic-ntlm-auth.trusted-uris network.automatic-ntlm-auth.allow-proxies: true network.automatic-ntlm-auth.allow-non-fqdn: true network.auth.force-generic-ntlm: false network.auth.force-generic-ntlm-v1: false

Ingocnito mode , same error. I have tried disabling all plugins. Disabled DNS over HTTPS.

HTTP/1.1 401 Unauthorized Server: Microsoft-IIS/10.0 WWW-Authenticate: Negotiate X-Powered-By: ASP.NET Date: Mon, 25 May 2026 08:15:41 GMT Content-Length: 0

Regards Rasmus

All the tabs, in both my profiles are constantly crashing. I cannot keep at a task for more than a few minutes without needing to restart the tab. Is this a setting problem? I've cleared the cache, and reset Firefox, to no avail. Thank you for any relevant advice and/or assistance.

I used to be able to log into Peacock without issues. Either Firefox changed something or Peacock did. But it no longer works correctly. I can sign in, but the main menu appears for a split second, then the screen goes black.

One of my bookmarked website (www.athletic.net) stopped loading text or graphics this morning. When I go to the site, all I see is a blank page.

I downloaded Google Chrome and can see the webpage loads properly. I also checked with my anti-virus (Bitdefender) and worked with their customer support to make sure their recent update was not causing the problem.

I have tried clearing the cache, rebooting the computer and other recommendations from the Firefox support site but the blank page problem persists. I have the most recent Firefox version 151.0.2 so am not sure what is causing the problem.

See attachment, some sites are not loading correctly at all, which ironically includes the mozilla sign in page. I also noticed it on camelcamelcamel.com. See attachments.

I already tried clearing cookies etc. Unchecking the "allow sites to choose their own fonts" fixes it but obviously I don't really want that disabled. I switched off Chrome recently so I'm already quite disappointed tbh.

Firefox will not allow signin to OptumRx, a well known pharmaceutical supplier. Simply doesn't work with their system, which uses login.gov. When I tried with MS Edge, NO problem!

Firefox ran all right, i.e. accessed anywhere in the world. But after I specified Express VPN to apply VPN to Firefox, Firefox stopped finding sites as if it lost name resolving ability. When I did a similar thing for Google Chrome or Microsoft Edge, such things did not happen.

I had a system crash and had to reset my PC to factory specs. I previously saved my Firefox recovery key so that I would be able to recover my bookmarks etc in case anything happened however when I tried to recover my info I kept getting a message that my key was invalid. I then realized that a 32 character key is necessary but my key is only 28 characters. Did I miss a few characters or do I have an older key that will no longer work? Any help or info you can give me on this will be appreciated.