Inability of FireFox to verify security certificates.

The warning below shows up consistently on every attempt to access the web, whether directly or by link such as in an e-mail: This includes sites regularly accessed including Google and Mozilla.
This Connection is Untrusted
You have asked Firefox to connect
securely to support.mozilla.org, but we can't confirm that your connection is secure.
Normally, when you try to connect securely,
sites will present trusted identification to prove that you are
going to the right place. However, this site's identity can't be verified.
What Should I Do?
If you usually connect to
this site without problems, this error could mean that someone is
trying to impersonate the site, and you shouldn't continue.

Please Update to the latest Firefox 19.0.x version.
*Help > About Firefox
*https://support.mozilla.org/kb/update-firefox-latest-version
*https://support.mozilla.com/kb/Updating+Firefox
The Firefox 4 version that you currently run is no longer supported with security updates
Check the date and time in the clock on your computer: (double) click the clock icon on the Windows Taskbar.
*https://support.mozilla.org/kb/Secure+Connection+Failed
Check out why the site is untrusted (see the Technical details).
Some firewalls monitor secure (https) connections and send their own certificate instead of the website's certificate.
You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.
*Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
*Click the "View..." button and inspect the certificate and check who is the issuer.
You can see more Details like intermediate certificates that are used in the Details pane.

Similar Messages

Trying to register MS Word 8.5 and Firefox says Invalid security certificate.

I tried to register MS Word 8.5 and got an error message from Firefox saying > Profile. microsoft.com uses an invalid security certificate. Error code:sec_error_unknown_issuer > I downloaded a patch that MS said I needed > kb933828 but it refuses to activate. MS Word 8.5 seems to work o/k but I want to get access to other templates etc, but cannot register. Please, help if you can.
== I downloaded MS Word 8.5 and tried to register with Microsoft.

The www.photoshopuser.com server doesn't send a required intermediate "PositiveSSL CA" certificate issued by Comodo.
You can inspect the certificate chain via a site like this:
*http://www.networking4all.com/en/support/tools/site+check/
You can Copy and Paste the certificate text of the missing intermediate certificate on the www.networking4all.com site to a .cer text file and import the certificate(s) in the Certificate Manager. 
DON'T set any trust bits, those are only required for root certificates and should never be set for intermediate certificates.
*Firefox > Preferences > Advanced : Encryption: Certificates - View Certificates

Firefox reporting bad security certificates

All of a sudden, Firefox is reporting "bad security certificate" for a number of websites--including Mozilla's!! I am using version 6.0.
The problem is worst on Google+. I added exceptions for the security certificate issues, but Firefox will not load any photos at all anymore for Google+. This is not an issue with IE on the same computer. This problem has been occurring only for the last three days.

I had already read that article, performed the recommended actions, and upgraded to 6.0.1. Unfortunately this has not solved anything. In addition to Google+, other https websites are having the same problem: Vanguard, Yahoo Mail, etc. This is happening across three of my computers, only on Firefox. When I use IE on the same computers to navigate to the same sites, no problems are occurring. I have tested both work and home PCs and it is happening no matter where I connect from.

Safari, chrome and firefox cannot verify identity of secure websites after upgrading to 10.7.4, apple engineers have tried multiple things including operating system with no success

safari, chrome and firefox cannot verify identity of secure websites after upgrading to 10.7.4, apple engineers have tried multiple things including operating system with no success

There are several threads about this problem, most notably one called 'Invalid Certificates' is over 4 pages long. Many of us have experienced difficulty connecting to banking and other secure sites. On my Macbook Pro, I cannot get to my banking site with any browser, however I can get there on my iMac using Safari, but get the 'Invalid Certificate' notice with FF and Chrome. The problem started after the installation of 10.7.4. I have sent a message to Apple--they will be dismayed to hear that I cannot complete an order at their online store!

Firefox (21.0) won't accept the security certificate for Twitter & won't let me add an exception.

My mother was having problems with her computer on the Internet and had to reset the modem. Problem was, I was on the Internet at the time using Twitter. She reset the modem, I thought everything was okay, but now Firefox isn't letting me access Twitter at all because of the security certificate. Here's the error message:
This Connection is Untrusted
You have asked Firefox to connect
securely to twitter.com, but we can't confirm that your connection is secure.
Normally, when you try to connect securely,
sites will present trusted identification to prove that you are
going to the right place. However, this site's identity can't be verified.
What Should I Do?
If you usually connect to
this site without problems, this error could mean that someone is
trying to impersonate the site, and you shouldn't continue.
twitter.com uses an invalid security certificate.
The certificate is not trusted because the issuer certificate is not trusted.
The certificate is only valid for gateway.2wire.net
(Error code: sec_error_untrusted_issuer)
gatway.2wire.net is the default error page for my modem, if the Internet is not working at all. I think the problem here is that now Firefox thinks the legitimate site for Twitter is the error page and not, well, Twitter.com. Also, I'm not getting any "add exception" option. How do I fix this?

Clear the cache and the cookies from websites that cause problems.
"Clear the Cache":
*Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"
"Remove Cookies" from sites causing problems:
*Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"

I have a server runnng on Mac OS 9.2.2 with a secure certificate from Verisign. Apparently some Firefox users get a message warning that the issuer is unknown to them. Verisign is perhaps the best-known issuer of certificates

Note: I am in the process of moving the site to our central server so all pages, with the exception of the secure ones and the homepage, are redirected. See https://www.homelink-usa.com/secure/subscribe/subscribe.lasso which is secure and, in my browser Firefox 3.6.13, the location window is blue just like your site that I am typing on. The certificate expires on March 20, 2011.
I do not get the error message on any of my machines or browsers.
Karl
This Connection is Untrusted
You have asked Firefox to connect securely to *www.homelink-usa.com*,
but we can't confirm that your connection is secure.
Normally, when you try to connect securely, sites will present trusted
identification to prove that you are going to the right place. However,
this site's identity can't be verified.
What Should I Do?
If you usually connect to this site without problems, this error could
mean that someone is trying to impersonate the site, and you shouldn't
continue.
Technical Details
www.homelink-usa.com uses an invalid security certificate. The
certificate is not trusted because the issuer certificate is unknown.
(Error code: sec_error_unknown_issuer)
I Understand the Risks
If you understand what's going on, you can tell Firefox to start
trusting this site's identification. *Even if you trust the site, this
error could mean that someone is tampering with your connection.*
Don't add an exception unless you know there's a good reason why this
site doesn't use trusted identification.

Might have a hardware issue that was caused by the minor liquid spill.
Take it to Apple to have them look at it. I think they do a free diagnostics. That way you can find out what's wrong with your MB.
Good luck....Hope you get it sorted out.

Freecause security certificate has expired and now i can't use firefox. What's the fix?

When I launch Firefox I get the following error message; Could not verify this certificate because it has expired.
xml.freecause.com:443 uses an invalid security certificate.
Issued to
Common name *.freecause.com
Organization freecause, Inc
Organizational Unit IT
Serial Number 04:64:CB:B8:16:32:4C:E5:AB:11:DF:01:5E:29:DC:78
Issued by
Common name Digicert Global CA
Organization Digicert Inc
Organizational Unit www.digicert.com
Validity
Issued on 9/11/08
Expires on 9/24/11
Fingerprints
SHA1 fingerprint D1:EB:E9:45:5F:67:D4:C1:82:10:EB:B4:A4:FE:OE:3E:D4:A5:CE:6C
MDS fingerprint C5:5D:8B:95:ED:C6:72:1A:A6:F8:EO:58:A8:62:6E:A8
Can't make it go away and it renders Firefox unusable.
Please help,
Marianne Hart

I don't have any freecause add-on, nor do I have a gamers unite toolbar, or a tracker for airline miles. I am completely unable to use Firefox (I'm on another computer right now).
It looks like I will just need to completely uninstall Firefox. I don't get this error message in IE 8 or in Google Chrome, so it's a Firefox problem apparently.
I can't even access Tools because the pop up window won't go away.
Bummer!

After upgrading to Firefox 10.0.2 there is no way to proceed to a website with an invalid security certificate. How do you proceed to these websites in the new release? The fault page only has a button that says "Try again."

Using Firefox 10.0.2 for Mac.
In trying to proceed to various websites (corporate such as dlnet.delta.com (expired certificate), government such as https://www.homeport.navy.mil/links/owa-navy-links/ ) with "invalid" security certificates, Firefox 10.0.2 does not have a button on the error page to continue on to the website. How can you do this using Firefox 10.0.2? I have not found any settings in Firefox preferences to enable this capability either.
Thx.

Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Invalid security certificate for my website host-they say the problem is Apple Safari and use Firefox instead

For the past few days, I keep getting an invalid security certificate in Safari whenever I select Edit My Site from my website homepage (http://annaporterartist.com), or whenever I select anything requiring a secure log in from my website host main page (FASO.com). I have contacted technical support at my website host (fineartstudioonline.com) and they say that this has been an intermittently recurring problem in Safari for years and they recommend that I use Firefox instead. As proof of this they emailed a link to an Apple Support discussion, but it was for Mac OS X Lion v 10.7.4 and Safari 5.1, even though I told them I am using Mac OS X Mountain Lion v 10.8.2 and Safari 6.0.2. I do not get this error message anywhere else on the web using Safari. I did try Firefox and it seems to work fine, but I prefer Safari and I want to know why Safari is not working as it should be. I am concerned that there is a real security problem with my website host and I need someone to explain why I am getting this error message, what it means, and if it is, in fact, a known problem with Safari or is my website host corrupted? Really tired of technical support playing pass the buck or pretending the problem does not exist.
The specific error message is:
Their response to my inquiry and my reply is shown below:

Back up all data.
Launch the Keychain Access application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Keychain Access in the icon grid.
From the menu bar, select
Keychain Access ▹ Preferences ▹ Certificates
There are three menus in the window. What is selected in each of them?

Firefox won't allow security certificate, even adding new will add a expired one. Clock is correct.

So i was trying to get into a admin panel for my mumble server.
www.mmo-mumble.com
But for some reason firefox decided this website is unsecured.
So i checked my security certificate and it was showing it expired yesterday.
I can get into that one, but when i removed it.
It did not even ask me to add a new one after visiting the site again.
I cannot even ignore the warning and continue to the site.
Adding the certificate manually worked, but it added one which was already expired.

I have experienced this problem exactly as the OP has described. I have to open task manager to temporarily restore Firefox functionality.
Also, my sister bought a new HP PC about a month ago. I intalled Firefox on it, and she also sees this problem.
I've been forced to go back to IE (which does not have this problem) until Firefox can sort this out, which hopefully will be soon.

Firefox won't let me allow a security certificate

I need connect to work remotely, but firefox won't let me. Says it can't verify the gateway and it's not safe to connect to the server. It doesn't even give me any option except to view the certificate. when I do that, it just ways that Windows doesn't have enough information to verify the certificate. Help!

Thanks -- however, I did previously and marked it as an exception. Now it says that it is a valid certificate, but I am still not allowed access -- I get the same message.

Firefox thinks every single website is insecure, does not validate literally any security certificates.

I have been using Seamonkey for quite some time without any issues. Recently, I wanted to start using the evernote web clipper extension, and there is no compatible version for Seamonkey. So I installed the latest version of Firefox, and it insists that the security certificate is invalid to literally every single website including even Google and Mozilla websites. I will post a screen shot of the problem here as well.
Thank you.

Check out why the site is untrusted (click "Technical Details to expand that section) and if this is caused by a missing intermediate certificate then see if you can install this intermediate certificate from another source.
You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.
*Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
*Click the "View..." button and inspect the certificate and check who is the issuer of the certificate.
You can see more Details like intermediate certificates that are used in the Details pane.
If "I Understand the Risks" is missing then this page may be opened in an (i)frame and in that case try the right-click context menu and use "This Frame: Open Frame in New Tab".
Note that some firewalls monitor secure (https) connections and send their own certificate instead of the website's certificate.

Firefox 27 in new profile will not store security certificate exception

I created a new profile in order to transfer settings to a new PC. Under the new profile I cannot permanently store Security Certificate exceptions although I can do so in the default profile. I can create a one off exception in the new profile. Is there a fix?

What I meant is which websites require you 990you to add an exception.
Check the date and time in the clock on your computer: (double) click the clock icon on the Windows Taskbar.
Check out why the site is untrusted (click "Technical Details to expand that section) and if this is caused by a missing intermediate certificate then see if you can install this intermediate certificate from another source.
You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.
*Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
*Click the "View..." button and inspect the certificate and check who is the issuer of the certificate.
You can see more Details like intermediate certificates that are used in the Details pane.
If "I Understand the Risks" is missing then this page may be opened in an (i)frame and in that case try the right-click context menu and use "This Frame: Open Frame in New Tab".
Note that some firewalls monitor (secure) connections and that programs like Sendori or FiddlerRoot can intercept connections and send their own certificate instead of the website's certificate.

The server you are connected to is using a security certificate that CAN NOT BE VERIFIED.

First we have changed nothing, we have not done anything to our Yahoo or Outlook 2003 and suddenly this starts popping up all the time.
We have Windows 7, Office Pro. 2003 and use Outlook 2003 with Verizon Fios and Yahoo is our email server. This message started popping up yesterday out no where, does anyone have any thoughts about it? I have posted it on the Verizon site, however I have more faith in the help I receive here thank you.
The server you are connected to is using a security certificate that CAN NOT BE VERIFIED.
A certificate chain processed but terminated in a root certificate which is not trusted by the trust provider.
Do you want to continue using this server?
Solved!
Go to Solution.

Did you get any email notification of a change to your email servers? So far I only found these settings from 2010
Incoming Server: incoming.yahoo.verizon.net
Server Requires Authentication: Yes
Username: fakeacct
Password: fakepassword
Requires a Secure Connection (SSL): No
Port: 110
Outgoing Server: outgoing.yahoo.verizon.net
Server Requires Authentication: Yes (You can set it to use the same settings as incoming, or manually enter the username and password.)
Requires a Secure Connection (SSL): No
Port: 25
(Big thanks to SomeGirl for this info)
Are these the settings configured in outlook? If these are the setting they may need to be updated
If a forum member gives an answer you like, please give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem. Thanks !!!
http://forums.verizon.com/t5/Verizon-net-Email/Fix-for-Missing-Inbox-sent-folders-etc-with-Internet-Explorer-11/m-p/647399

Firefox won't open my PayPal account. There is a message about security certificates

I am having a lot of trouble with security certificates for different sites. Messages keep coming up about invalid security certificates and it isn't true. I have to check my PayPal account and I can't get into it. eBay also register as invalid security certificates.

Make sure that your security software isn't intercepting secure connections and send its own certificate.
You can retrieve the certificate and check who issued the certificate.
* Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
* Click the "View..." button to inspect the certificate and check who is the issuer and other details.

Inability of FireFox to verify security certificates.

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