Firefox sec_error_unknown_issuer

Similar Questions

• Facebook, google ERROR sec_error_unknown_issuer in 35 charges of Firefox windows 8.1

  8.1 Windows 64-bit
  Firefox 35 (later)

  -Installed fresh firefox 35
  -Same Firefox refreshed with safe mode
  -When you open the page google.com, facebook.com (attached Image) get the error page that shouldn't be the error/exception.
  -Is not for the first time even in past I had this error for google.

  Why Developer firefox is neglecting this every time they introduce a newer version. ?

  relocation of probably will not work. This problem sounds like it is caused by the security filter for the family of MS and Windows Update KB2965142 (published on 09/06/2014) in particular.
  in order to solve, please refer to the Microsoft documentation on the subject: http://support.microsoft.com/kb/2965142/en-us#2

• When you try to access a web page I get the following error: (error code: sec_error_unknown_issuer) Firefox will not let me add an exception

  I can access the site with other web browsers below, however, Firefox won't let me access it or I can add an exception so that it is access. If I can't access the web site, I have no reason to use Firefox at all. Can someone please?

  If you can not add an exception, but get a pop-up with the error message, you can go the pref browser.xul.error_pages.enabled on the topic: config page and make sure that the value is set to true (the default).

  You can retrieve the certificate and the control that has issued the certificate.

  • Click on the link at the bottom of the error page: "I understand the risks".

  Let Firefox recover the certificate: "Add Exception"-> "get certificate".

  • Click on the "view..." button. "to inspect the certificate and the Coachman, who is the sender.

  Only leave the brand in the box at the bottom to "permanently store this exception' If you trust this certificate.

  • Click on "Confirm the Security Exception" to enter the site if you still want to go to this site.

• Untrusted connection Firefox

  I tried all possible ways to correct this error, none of the work site, the only one which is yahoo and they all say the same error

  If you normally connect to this site without problems, this error can mean that someone is trying to impersonate the identity of the site, and you should not continue.

  This site uses HTTP Strict Transport Security (HST) to specify that Firefox didn't connect safely. As a result, it is not possible to add an exception for this certificate.

  www.Google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server may not send the appropriate intermediate certificates. A certificate of origin additional should be imported. (Error code: sec_error_unknown_issuer)

  There are security software such as Avast and Kaspersky and BitDefender and ESET which intercepts secure connections and sends its own certificate.

  If you cannot inspect the certificate by "I understand the risks", then try this:

  Open the "Add Security Exception" this URL chrome by pasting into the address bar of Firefox and check the certificate:

  • chrome://pippki/content/exceptionDialog.XUL

  In the field of location of this window, type or paste the URL of the Web site.

  • retrieve the certificate via the button 'Get certificate '.
  • Click on the "view..." button. "to inspect the certificate in the certificate display

  You can check details such as the issuer and the certificate chain in the Details tab of the certificate display.
  Check which is the issuer of the certificate.
  If necessary, you can attach a screenshot that shows the display of the certificate.

• Error code: sec_error_unknown_issuer

  Hi, I've been reviewing several similar positions, but none of them is trying to solve my problem.
  Question: "this connection is untrusted" with "sec_error_unknown_issuer". But NO option of "I understand the risks".
  My firefox suddenly unable to access sites such as YAHOO Mail, Google Mail, Facebook, Linkedin, etc while firefox is able to access other websites on a regular basis. Other broswers (IE, Chrome) do not have this problem.

  Measures taken
  1. confirmation of Date and time is correct.
  2. 'certificate' shows that these sites are in the list
  3. cleared Cache and cookies.
  4. I am in the company network. So I must be either "proxy auto-detection" or "use the system proxy setting. If I change the 'no proxy', Firefox could not get in any Web site.
  5 deleted cert8.db

  None of them worked to solve this problem. Please help solve this problem. Thank you

  IMPORTANT: Make sure THAT YOU APPROVE the INTERMEDIARY TO READ ALL YOUR SECURE TRANSMISSIONS before USING THIS SOLUTION. FIRST CHECK FOR MALWARE.

  In fact, it was a string of a link, then another, then a clarification, is probably easier to copy and paste:

  Export

  • In the certificate Viewer IE or Chrome, click on the cert that you want to export in the Certification Path tab and use the button view the certificate to open it directly. Note: in this case, try to export the certificate of the ROOT CA at the top of the trajectory
  • Click on the Details tab, and then click the Copy to file button. This will start the Export Wizard. Use the DER format and save to a convenient location.

  Import

  • In Firefox, open the Certificate Manager using the: button menu '3-bar' (or Tools menu) > Options > advanced > mini-onglet Certificates > "view certificates" button.
  • Click on mini - the References tab, then on the 'Import' button and find the DER file. Note: I suggest allowing the certificate for Web only, unless your IT suggests otherwise.

  I enclose some screenshots for reference.

  It work?

• Https (sec_error_unknown_issuer) sites display problem

  Lately, I have upgradet Windows 8.1 to 10. First of all, it seemed all right.
  But when I opened Firefox and wanted to open Google.com I got sec_error_unknown_issuer error.
  First of all, I cleared my cache. But it did not work after that. So I uninstalled Firefox and installed it again.
  The error message is still there.

  Sorry for the inconvenience. Many users are updating their security software or activate the parental control during or shortly after their upgrade to Windows 10 and Firefox may need to be put in place to work with these changes.

  Using Avast, BitDefender, ESET or Kaspersky Security software?

  If not, could you try to disable the parental controls from Microsoft: http://windows.microsoft.com/en-us/windows-10/turn-off-microsoft-family-settings

• Sites Web regularly not approved since refreshing Firefox. I deleted cert8.db; time settings are fine, but still does not work. What should do?

  First had error message saying that something prevents update with the Firefox Firefox refresh query. So I did. Result is common Web sites such as google and own sites of mozilla not opening not because "Untrusted connection" - (error code: sec_error_unknown_issuer).
  I am working on Mac OS X 10.10.2
  Has deleted the cert8.db in folder profile a couple of times, but does not work.
  Time settings are fine.
  Removed the whole browser app and reinstalled again; same problem occurring. What is going on? And above all, how can it be fixed?

  Ah, you see AVAST there under the issuer of certificate?

  Your Avast security software is intercepting your navigation to filter threats. In order to filter connections secure, Avast creates these false certificates and presents them to your browser. Since Firefox uses a certificate from Safari, Firefox should be set up to trust in Avast to generate these certificates.

  Now... in theory, Avast is supposed to update Firefox automatically when you go outside and start it again. I guess you left Firefox since this problem started, but, if not, that give a try.

  If this does not work, you or a volunteer will have to search the steps to get the Avast signing certificate in Firefox.

  Plan C would be to get the old file cert8.db file old data of Firefox on your desktop and it transplanted into your current Firefox profile. You must already have been put in place to work with Avast.

• Firefox won't open Google without a mistake "this connection is untrusted", and no option to obtain a temporary certificate is available.

  This problem arose for the first time a few months ago. but I managed to work around it by clicking on "I understand the risks" on the warning page "this connection is untrusted", then adding a security exception. This fix would work for the lengths of time, sometimes for days, sometimes for minutes. Now, after upgrading to the latest version of Firefox, I get the same caveat of security, but the option to click on "I understand the risks" disappeared. I get this error message on the page of technical details: (error code: sec_error_unknown_issuer)

  I have everything listed here repeatedly made: https://support.mozilla.org/en-US/kb/connection-untrusted-error-message
  I tell everything. Remove cert.db, start in safe mode, clear the cache, delete and reinstall... Nothing works.

  Your help would be greatly appreciated!

  In Firefox, you must import into the authorities. The certificate will generally have a .cer extension.

• All of a sudden, after a update of firefox, I get "this connection is untrusted" for Facebook, no matter if I use http: or https:, WHY?

  All of a sudden, after a update of firefox, I get "this connection is untrusted" for Facebook, no matter if I use http: or https:, WHY? Here are all the details of the error message:

  This connection is Untrusted

  You asked Firefox to connect safely to facebook.com, but we cannot confirm that your connection is secure.

  Normally, when you try to connect safely, sites will present a reliable identification to prove that you're in the right place. However, the identity of this site cannot be verified.
  What should I do?

  If you normally connect to this site without problems, this error can mean that someone is trying to impersonate the identity of the site, and you should not continue.

  This site uses HTTP Strict Transport Security (HST) to specify that Firefox didn't connect safely. As a result, it is not possible to add an exception for this certificate.

  Facebook.com uses an invalid security certificate.

  The certificate is not trusted because the issuer certificate is unknown.

  (Error code: sec_error_unknown_issuer)

  (Also included a screenshot).

  COR - el said

  You can check the date and time and time zone in the clock on your computer: (double) click on the clock icon in the Windows taskbar.

  • https://support.Mozilla.org/KB/secure+connection+failed

  You can retrieve the certificate and check details such as WHO issued the certificates and the expiration dates of certificates.

  • Click on the link at the bottom of the error page: "I understand the risks".
  • Let Firefox recover the certificate: "Add Exception"-> "get certificate".
  • Click on the button "View" and inspect the certificate and the Coachman, who is the issuer.

  You can see more details like the intermediate certificates that are used in the Details tab.

  If you cannot inspect the certificate by "I understand the risks", then try this:

  Open the chrome URI by pasting or typing this URI in the address bar to open the window "Add the Security Exception" and to check the certificate:

  • chrome://pippki/content/exceptionDialog.XUL

  In the field location type and paste the URL of the Web site

  • retrieve the certificate via the button 'Get certificate '.
  • Click on the "view..." button. "to inspect the certificate in the certificate display

  Check which is the issuer of the certificate.

  You can get more details like the certificate chain in the Details tab of the certificate display.

• Gmail NOT working, error this site uses HTTP Strict Transport Security (HST) to specify that Firefox didn't connect safely

  You asked Firefox to connect to www.gmail.com, but we cannot confirm that your connection is secure.

  Normally, when you try to connect safely, sites will present a reliable identification to prove that you're in the right place. However, the identity of this site cannot be verified.
  What should I do?

  If you normally connect to this site without problems, this error can mean that someone is trying to impersonate the identity of the site, and you should not continue.

  This site uses HTTP Strict Transport Security (HST) to specify that Firefox didn't connect safely. As a result, it is not possible to add an exception for this certificate.
  www.gmail.com uses an invalid security certificate.

  The certificate is not approved, because no sender string has been provided.

  (Error code: sec_error_unknown_issuer)

  Well, these aren't real site certificates, they are signed by a different transmitter, apparently your VPN. In order to trust with your VPN as a certificate issuer, you need to import another certificate, the signing certificate.

  In Internet Explorer, you would an expert this certificate to the REB/DER format, and then in Firefox you should be in the References, not the servers tab tab, the display of the certificate. After that, the false certificates signed JuniperSSL will be considered valid.

  At least that's what's supposed to happen.

• I keep getting the "this connection is not approved" in all the sites when I use Firefox on windows laptop 36.0.1 8. How can I overcome this.

  I keep getting the "this connection is not approved" in all the sites when I use Firefox on windows laptop 36.0.1 8. How can I overcome this.

  Hi vijaysampath, please make sure first that the date, time, and time zone are set correctly on your system. If this does not solve the problem (or it is already set correctly), a possible solution depends on different factors:

  • What is the error code indicated under Technical Details on the error page?

  in case the error code is equal to sec_error_unknown_issuer, please try to add an exception on the bottom of the error page to verify the certificate, as shown on the attached screenshot:

  • What information about the issuer of the certificate contain?

  Please take these two pieces of information. Thank you!

• I'm trying to access all sites gives the warning (error code: sec_error_unknown_issuer)

  This affects my computer only profile (windows 8) and only on Firefox. I disabled SSL on AVG as help pages suggest and tried to reinstall, both without effect. Someone knows how to fix this?

  Check the date and time and time zone in clock of your computer: (double) click on the clock icon in the Windows taskbar.

  Find out why the site is not approved, then click on "Technical Details" to expand this section.
  If the certificate is not reliable because no issuer channel was provided (sec_error_unknown_issuer) and then see if you can install the intermediate certificate from another source.

  You can retrieve the certificate and check details such as WHO issued the certificates and the expiration dates of certificates.

  • Click on the link at the bottom of the error page: "I understand the risks".

  Let Firefox recover the certificate: "Add Exception"-> "get certificate".

  • Click on the "view..." button. "and inspect the certificate and the Coachman, who is the issuer of the certificate.

  You can see more details like the intermediate certificates that are used in the details pane.

  If "I understand the risks" is missing, then this page can be opened in a (i) frame and in this case, try the shortcut menu and use "Frame this: Open image in New Tab".

  • Note that some firewall monitors connections (sure) and that programs like Sendori or FiddlerRoot can intercept connections and send their own certificate instead of the certificate of the Web site.
  • Note that it is not recommended to add a permanent exception in such a case, so only use it to inspect the certificate.

• Firefox is not trusting a Web page, I chose to continue. That is what it is?

  I had trouble getting through the internet, since I had to restart Firefox. Each. Unique. Web site I try to go to it automatically throws to the top of the "Unsafe/trusted Connection" box and I have to trust all. unique. page... now I can't on a site I trust because Firefox has decided that he was not sure because "the certificate is not reliable because no sender string has been provided. (Error code: sec_error_unknown_issuer) ». He makes me seriously consider changing to a new browser, because this problem is ridiculous. I even had to push it through Google. Google. Now Firefox.

  Hello palekitsune, this error message will be a reason why it caused - most likely your software security or unwanted software, interfering with the secure network connections.
  Please try to add an exception on the bottom of the page error (do not add this for real!) and inspect the certificate - see the screenshot attached for instructions:

  • What information about the issuer of the certificate contain?

  Thank you!

• Why Firefox 32 suddenly does not recognize a certificate?

  Firefox 32 says that https://rcmail.secure.ne.jp/rcmail-05/ is not approved:
  rcmail. Secure.ne.jp uses an invalid security certificate.
  The certificate is not trusted because the issuer certificate is unknown.
  (Error code: sec_error_unknown_issuer)

  Web site identity
  Website: rcmail.secure.ne.jp
  Owner: This Web site does not provide ownership information.
  Verified by: unspecified

  Privacy & history
  I have visited this site before today? Yes, 114 times

  31 Firefox displays the site very well before today.

  Internet Explorer 10 says that everything is confidence today:
  SECOM Trust Systems CO LTD
  Servision CA
  rcmail. Secure.ne.jp

  Of SECOM certificate by http://www.valicert.com/ and valid from 1999 to 2019.
  From Servision also certificate of http://www.valicert.com/ and valid from 2007 to 2017.
  rcmail.secure.ne.jpcertificate is issued by Servision and valid from the 2014.01.08 to the 2015.01.16.

  Hello n0diamond, mozilla removed support of certificates root with RSA key sizes less than 2048 bits for security reasons, SECOM has been one of them.

  https://wiki.Mozilla.org/ca:MD5and1024
  https://developer.Mozilla.org/en-us/Firefox/releases/32/Site_Compatibility#security

• Impossible to go to Firefox or Mozilla Web sites

  I just installed Firefox on my work laptop and imagine my surprise when the first site, I try to visit the site of https://accounts.firefox.com , does not open because:

  Accounts.Firefox.com uses an invalid security certificate.
  The certificate is not trusted because the issuer certificate is unknown.
  (Error code: sec_error_unknown_issuer)

  This also happens with support.mozilla.organd virtually every https site I'm trying.

  I tried the solutions and the best that no one can say 'remove the cert8.db' file... which doesn't help.

  I deleted cert8.db twice and reset Firefox. Nothing I did worked. And the pages of all open them very well using other browsers.

  How can I fix it? Or should I give up on Firefox at 10 minutes to try out it...?

  Thanks Phillip, I managed to export the certificates of Chrome, and then import them into Firefox. It seems to work more or less (Sync does not work so well but who may be independent).

  Thanks for your help, really appreciate it!