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I am trying to reach an internal company website ([URL]), with a certificate chain rooted in a company certificate authority. This works fine in Chrome, and worked in Firefox on my previous computer. But i recently got a new machine, and something somewhere is not quite right. I get an error message looking like this (between the ~~~s):

~~~ Someone could be trying to impersonate the site and you should not continue.

Web sites prove their identity via certificates. Firefox does not trust [URL] because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates.

Error code: SEC_ERROR_UNKNOWN_ISSUER

View Certificate ~~~

If i click on the error code, i get these details:

~~~ [URL]

Peer's Certificate issuer is not recognised.

HTTP Strict Transport Security: false HTTP Public Key Pinning: false

Certificate chain:

[certificate]

[certificate]

[certificate]

~~~

If i click 'View Certificate', i get a chain of three certificates:

1. Subject common name = [certificate]
2. Subject common name = [certificate]
3. Subject common name = [certificate]

If i go to Settings > Privacy & Security > View Certificates > Authorities, i can find both the [certificate] certificates. As far as i can tell, they are identical - i can open the certificate from 'View Certificate' and the corresponding one from the certificate manager and flip between tabs, and all the details are the same.

I am using Firefox 120.0, via a flatpak, on Ubuntu 22. I have given the flatpak access to /etc/ssl/certs, where my company's internal CA certificates are located.

To me, this seems like it should all work. The server has a certificate signed by an internal CA, which is signed by another internal CA, and both those internal CA certificates are in my certificate manager. So what is going wrong? Is there any way i can debug this?

Currently I must sign on to Frontline Education to see if there are any new substitute teaching job offers available 24/7. I would like to receive audible notifications on my Macbook Pro or Apple ipad or Apple iphone to alert me to a new job offer so that I can then go to my device and look at the job offer. Thank you. John Marshall

I tryed Firefox 115.8.0esr and 115.9.0esr 32Bit on Windows 7. (78.15.0 works) Firefox crashes(the whole program, i mean no tab) on "about:support" or some pages on support.mozilla.org like https://support.mozilla.org/de/kb/firefox-leistungseinstellungen always reproduceable.

I disabled all Addons, i disabled this power optimizion setting, removed usercrome.css same. With Firefox savemode it dont crash. Spyware is blocked, means datareporting/telemetry/ping by disabling the options and empty the urls (like on FF 78 but it dont crash). Somewhere i read firefox can crash on a empty url, but i assume its fixed long time ago. A wrong, unreachable or empty url should not crash on well programming. Think about countrys that blocks urls, adblocker, pihole and so on. I dont remember about what url i read.

Does the savemode revert all about:config settings? What does support.mozilla ask the browser that causes the crash? It know it seems to identify the Browser, but usual its done by useragent and no "internal" communication.

Then FF always crash on ebay.de search if you scroll or change settings while the page is not ready. Spyware is too blocked by Hardware, ebay may wait for some ad? But thats already on FF78 but on 115 it seems more often, this was not with FF 52. But some sites including ebay stops to work with FF52/78 so no choice.

I'm encountering some difficulties with my current account, which is locked out. I would like to request assistance from the support team to help me delete my account and remove my personal information from the platform. However, I'm having trouble finding the contact information for the support team. I couldn't locate their email address or phone number, and I'm hesitant to post my personal email address and information on a public forum.

I'm feeling quite frustrated, as I've never encountered such challenges with an app before. It appears that I'm unable to reach the Firefox support team at the moment. Can someone please provide guidance on how I can securely and privately request their assistance in deleting my account and personal information?

I had to create a new account just to post this question because my original account got locked out. This happened because I recently acquired a new phone and didn't transfer the two-step authentication information to my new device.

Secure Connection Failed

An error occurred during a connection to www.youtube.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

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.

ERROR MESSAGE WHEN TRYING TO ACCESS ALL WEB SITES: Secure Connection Failed

An error occurred during a connection to connect.xfinity.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

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

Okay, I give up. So, Facebook is or has implemented this Turn on two-factor authentication or whatever it is. What this means for me at the moment is that I am unable to access my Facebook account as it is now forcing me to use this Two-factor authentication thingie, despite that I do not have a mobile phone. (yes, I know it's unusual in this day of age not to have one. I did have one at one time, but for the moment I have no interest in getting another one). I would rather use my laptop anyway.

Doesn't Firefox have a Two-factor Authentication thing that I can use with Facebook? Without a mobile phone using the Firefox browser on a computer or laptop?

Now, from what I can see, Facebook is offering 3 ways of doing this. #1) Authentication app, like Google Authenticator or Duo Mobile. #2) Text message (SMS). #3) Security Key. So, because I do not use or have a mobile phone, I was guessing that my option would only be #1 Authentication app, like Google Authenticator ... which I have never used before, and while reading up on it, I keep reading that I can only use it with the Google Chrome browser?!? If that wasn't bad enough, I typically use Microsoft Outlook, not Gmail. So, I am at a loss at this point.

Again, I do not have a mobile phone. Doesn't Firefox have a Two-factor Authentication thing that I can use with Facebook? Without a mobile phone using the Firefox browser on a computer or laptop?

Help please.

Hey all,

Last night I made the mistake of clicking a sketchy link on twitter thinking what it was some meme site( the person who tweeted is someone I know personally so I thought it was safe) once I clicked on it, I wasn’t redirected to the site so I thought it was weird then once I learned that he deleted it because it was compromised. I got scared and I was running scans through Microsoft defender. After the full scan it said that it detected Trojan:HTML/Phish!pz and the affected files where C:\Users\….\Local\Mozilla\Firefox\Profiles\cq0glqqq.default-release\cache2\entries. I deleted my cache a few hours later than I should.

So I reached out to a friend and they told me that it was probably was a false flag and I didn’t need to delete my cache. But I’m nervous that it’s an actual threat and I should do more to ensure my computer is completely safe. Also probably a lot of grammar mistakes I haven’t slept since I got this information.

I need to change my email address. The old email address is disabled and doesn't work. I have a new email address *email*@gmail.com and can't get a code from the old one which doesn't work anymore. What do I do.

I am having trouble pinning any Extensions to my toolbar. When i click on the Extensions icon (puzzle piece), the Extensions menu immediately pops up. My extension (Bitwarden) is set to "Enabled". When I click on the three horizontal dots, however, the only options are 1) Remove, 2) Report, or 3) Manage. There's no option given to pin the extension.

Because of that, the extension basically never opens, and I am unable to use it. Does anyone have any suggestions for me? Thanks in advance.

I am running Firefox 129.0.2 (64-bit) in Windows 11 on a Surface tablet. FWIW, the extension is running fine in Chrome.

I have Fire fox 4 and I wish to upgrade to Fire fox 5 or 6 , is this free? and if I do upgrade will I lose my bookmarks ? ....... I want to upgrade ! .... fire fox has improved my computer speed ....alot .........GREAT PRODUCT ...... I only wish to improve my fire fox .......and if the upgrades are free or ? ..........thanx Don L

I've been trying to watch live sports events on SECN+ through my Hulu subscription, but I'm encountering an error message stating, "The media could not be loaded, either because the server or network failed or because the format is not supported." I discovered that Firefox is blocking the stream, while it works perfectly on Chrome. With the college football season and other sports events approaching, I’m concerned that if this issue persists, I may have to stop using Firefox, which I've relied on for over two decades. Please help me fix this issue at your earliest convenience. Thanks.

I've written this back in March of 2024 about Being Managed By Your Organization but after reading all the ones that state "Resolved" I still don't get it! I'm using Win 10 Pro 64 Bit Enterprise and everyday or any time I reboot I have to go into the registry to find Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies and delete Mozilla which the key shows ImportEnterpriseRoots. Now I'm running Avast Premium Security and have dealt with it from what I read about anti virus programs. When it comes to going into C:\Programs\Mozilla\ it doesn't show a folder called Distribution (not sure if that is the correct name but close enough to delete some jason file. I need some plain simply answer to resolve this daily problem.If you need more information please ask since I'm at my whits end dealing with this idiotic injection where even MircoShaft thinks I'm being managed *Some settings are managed by your organization? What organization since I don't have one. Please help a senior at 74 get this resolved.

Thank you and hopefully I'll get the answers I've been looking for. Jan Klassan

Firefox is refusing to open sites I am trying to access from links in my protonmail email account. It is giving me a message saying the sites are potential threats. "pdpwbj.clicks.mlsend.com" is what it tells me is the problem.

This is something I do everyday without issue. It isn't limited to one source of emails/websites - it is all of them.

I have cleared cache and history already. Help please as I need to access these websites for my work and having to go to all the individual websites and then to search for the linked content is taking a lot of time I don't normally use because I can just load using the links.

Thank you

It seems since the latest update to FireFox (129.0) I am no longer able to pick a search engine to use, I can click on DuckDuckGo or any other choice for a search and no search engine will come up?? Thank You for any help or suggestions.

I've added https://x.com as an exception site but it is still blocked.

https://x.com/mozilla doesn't work either

Error message on the page:

"Something went wrong, but don’t fret — let’s give it another shot.

⚠️ Firefox’s Enhanced Tracking Protection (Strict Mode) is known to cause issues on x.com"

After 2 days it used to finally load without my doing anything, but not now. I never loads using Firefox.

https://x.com is added as an exception, but obviously ignored.

Tried You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

   hold down the Shift key and left-click the Reload button   

NOPE

Tried: Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings), click the padlock icon (Clear cookies and site data) for the domain in the selected tab.

"Remove the Cookies" for websites that cause problems:

   Settings -> Privacy & Security
   Cookies and Site Data: "Manage Data" 

"Clear the Cache":

   Settings -> Privacy & Security
   Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear 

   https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox
   https://support.mozilla.org/en-US/kb/how-clear-firefox-cache 

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

   switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
   do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window 

   https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
   https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems 

NOPE - lost all my bookmarks, extensions, settings - not going there again thank you

as for:

You can check for issues with Enhanced Tracking Protection. Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

   click the shield icon for more detail and possibly disable the protection 

the sheild has a slash thru it saying "enhanced tracking is off for this site" when i put my mouse over it.