This Connection is Untrusted Error

Having trouble with my Mac or Mozilla. I keep getting the "This Connection is Untrusted" on 3/4 of the websites I visit during a session on the internet. I have made sure that I have the Use SSL 3.0 and Use TLS 1.0 Protocols checked.
I might have deleted some security certificates or added some add-ons right before I noticed the error message.
Anyone have any ideas?
Thanks.

check this article ...
[["This Connection is Untrusted" error message appears - What to do]]
... and let us know, if it helped.

Similar Messages

Can't skip "This Connection is Untrusted" error page

The SSL certificate for one of the sites I use expired today a couple hours ago, and the devs of that site still haven't had spare time to update it yet. Suppose it's not a big issue, in most (other) browsers you can just review the problem and click on "continue anyway" link or something like that, when you're sure that the certificate was expected to become invalid. So you can visit the page requested with broken certificate in _single_ click. But not in Firefox.
As I remember - some time ago on the Cert Error page there was "I understand the risks" paragraph with the button "Add exception" below. Looks like it got disabled in Firefox 30 as I don't see it there. Okay, I googled around and found out that in about:config page there's a secret option browser.xul.error_pages.expert_bad_cert which was in disabled state by some reason (I personally haven't ever touched it before). Okay, now I'm able to open the ugly "Add exception" window, but when I add exception - nothing happens. Neither temporary not permanent exception option allowes me to view the site. "This Connection is Untrusted", browser says. Period.
After that I've tried to install "Skip cert error" add-on - with no success. Even if I add the site URL to whitelist in add-on options, which "in theory" should bypass ANY security checks for this exactly domain - then I still end up staring at "This Connection is Untrusted" error which simply can't be bypassed by any means.
The sites I've tried to reach are https://lists.openwrt.org and https://forum.openwrt.org. It's interesting though, the certificate is also expired at https://openwrt.org, but that site can be added to exception list and then firefox opens it. However I see completely NO WAY to make firefox open https://lists.openwrt.org or https://forum.openwrt.org.
I've run out of ideas and came here. Hope somebody knows how to workaround this issue.
PS: I wonder why the hell there's no option to bypass the check by some _simple_ means like in other browsers so that I could reach requested site in seconds rather then searching for settings/addons/workarounds for hours. Thank you firefox for such enourmous care for security, you've made me run Internet Explorer again...
Update 1:
It appears that in this case the certificate was registered for domain openwrt.org, but was also used for forum and lists subdomains. Now it is expired, but the expiration issue can be ignored by exception list only for openwrt.org itself. Other subdomains are actually added to exception list, but it doesn't work for them, so that browser is stuck at "untrusted connection" error which can't be ignored or skipped. What a shame.
Update 2:
I was quiet wrong in Update 1: in fact the SSL certificate for openwrt.org was Level 2 certificate with correcly registered subdomains like forum.openwrt.org and lists.openwrt.org. However when the certificate expired, only openwrt.org exception worked and the site was browseable. All the subdomains could be added to exceptions but regardless of that fact firefox refused to open those sites and was stuck on unskippable "untrusted connection" error page.
For now openwrt.org maintainers have already renewed their certificate so the problem can't be observed on those domains anymore. However I believe that the problem in firefox exceptions handling still exists and should be fixed in future firefox releases.

Hi kozaki, this thread is about an older version of Firefox. Could you start a new question?
For what it's worth, I see the "I understand the risk" section of this page in Firefox 33.0.3: https://forum.anomos.info/ -- but I have not added an exception for the top level site, so maybe that's a partial explanation for the difference.
Also, a new release of Firefox is out today which makes some changes for certificate issues.
To start a new Q: https://support.mozilla.org/questions/new/desktop/fix-problems
If the suggested articles are not useful, scroll past them to continue with the form.

I noticed that I get a "This Connection is Untrusted" error in Firefox. I use KIS 2015. I reseted Firefox. Pls advise

I've just installed the latest version of KIS and now I"ve noticed that I get a "This Connection is Untrusted" error in Firefox whenever I try to go to either of those websites. I reseted Firefox. I am unable to open anything through firefox-- my yahoo mail, google accounts, search through google, etc. Any suggestions on how to get firefox to work?

http://www.ehow.com/how_11385212_troubleshoot-reset-connection-firefox.html
https://support.mozilla.org/en-US/kb/server-not-found-connection-problem
https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can
https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message
https://support.mozilla.org/en-US/kb/connection-untrusted-error-message
'''http://kb.mozillazine.org/Error_loading_websites'''
'''This Connection is Untrusted''' is sometimes caused because the
computer system clock is wrong. Check the time / date / time zone settings.

While replaying ajax truclient scipt in loadrunner i am getting "this connection is untrust" error in the 40th step. I tried by deleting cert8 file but no use

while replaying ajax truclient script in loadrunner 11.0, getting error "this connection is untrust" page in 40th step. Add this exeception permanently check box is disable when i got the exeception certificate file. i tried with by deleting cert8.db file in loadrunner ajax truclient profile but still same result.
can any one guide me to resolve this issue...

Is that content loaded in an iframe?
You can check that via the right-click context menu to see if there is a "This Frame" item. 
If that is the case then try top open the frame in a new tab or otherwise check the Technical Details of the error message.

I am getting "this connection is untrusted" error messages from Firefox for Desktop when I try to log into certain websites, such as Facebook. Why?

I get this error message "this connection is untrusted" after I re-installed Windows Vista and all my programs. This happened before but after reformatting my computer everything was good. Why am I getting this? Could it be a virus of some sort? It happens when I use Windows Internet Explorer as well....

Hi,
Please check the time/date on the PC. The ideal setting would be to '''Automatically synchronize ...''' in Date and Time > Internet Time.

Cannot access any https sites, clock is OK, get This Connection is Untrusted error message.

All works OK on Chrome and IE, but Firefox just suddenly stopped access to https sites yesterday, e.g. Google, Facebook and Linkedin. Non secure http sites are OK though. "This Connection is Untrusted" is the error message and technical details are www.google.com.tw uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer). I've tried all the Mozilla support suggestions, clock (which was always correct), reset Firefox, etc. No change so far, I hope you can help fix this issue.

Check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar.
Check out why the site is untrusted and click "Technical Details to expand this section. If the certificate is not trusted because no issuer chain was provided (sec_error_unknown_issuer) 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.
*Note that it is not recommended to add a permanent exception in cases like this, so only use it to inspect the certificate.

This connection is untrusted error reportwhen trying to check e-mail

Every time I try to get my Yahoo or Google e-mail, I get the following message "You have asked Firefox to connect securely to us-mg5.mail.yahoo.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."
I have tried uninstalling and reinstalling Firefox, and tried deleting cert8.db. file and nothing has worked.
How do I fix firefox so that it will work with two of the most popular e-mail addresses?

hello bgreenberg, maybe your antivirus software is interfering here. does it make a difference when you disable the scanning of encrypted connections/https within the kaspersky network settings?

This Connection is Untrusted and few websites layout is broken

I have tried almost all the solution to get rid of the issues but could not find a solution.
My Chrome and IE is working fine as its expected in same machine but not firefox.
Issues - 1
Website layout is disorted eg.
https://support.mozilla.org/en-US/products/firefox?as=u&utm_source=inproduct
https://www.facebook.com/
Issues - 2
This Connection is Untrusted
You have asked Firefox to connect securely to www.facebook.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.
I have tried following Solution:
1. Uninstalling firefox completly including deleting profile + reboot + install
2. Reset the Firefox
3. Clear the caches and evreything.
But could not solve my problem so now I am posting this questions. I am using Latest Firefox with Windows 7.
Please help me to get rid of these issues as I am highly dependent on Firefox.
-Rajesh
troubleshoot info
Application Basics
Name: Firefox
Version: 33.1.1
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0
Multiprocess Windows: 0/1
Crash Reports for the Last 3 Days
All Crash Reports
Extensions
Name: Troubleshooter
Version: 1.1a
Enabled: true
ID: [email protected]
Name: WebEx Productivity Tools
Version: 2.0
Enabled: false
ID: [email protected]
Graphics
Adapter Description: Intel(R) HD Graphics 4600
Adapter Drivers: igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32
Adapter RAM: Unknown
Device ID: 0x0416
DirectWrite Enabled: false (6.1.7601.18245)
Driver Date: 6-3-2013
Driver Version: 9.18.10.3204
GPU #2 Active: false
GPU Accelerated Windows: 0/1 Basic (OMTC)
Vendor ID: 0x8086
WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 4600 Direct3D9Ex vs_3_0 ps_3_0)
windowLayerManagerRemote: true
AzureCanvasBackend: skia
AzureContentBackend: cairo
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0
Important Modified Preferences
browser.cache.disk.capacity: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.frecency_experiment: 4
browser.places.smartBookmarksVersion: 7
browser.sessionstore.upgradeBackup.latestBuildID: 20141113143407
browser.startup.homepage_override.buildID: 20141113143407
browser.startup.homepage_override.mstone: 33.1.1
dom.mozApps.used: true
extensions.lastAppVersion: 33.1.1
gfx.direct2d.disabled: true
layers.acceleration.disabled: true
network.cookie.prefsMigrated: true
places.history.expiration.transient_current_max_pages: 104858
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
privacy.sanitize.migrateFx3Prefs: true
Important Locked Preferences
JavaScript
Incremental GC: true
Accessibility
Activated: false
Prevent Accessibility: 0
Library Versions
NSPR
Expected minimum version: 4.10.7
Version in use: 4.10.7
NSS
Expected minimum version: 3.17.2 Basic ECC
Version in use: 3.17.2 Basic ECC
NSSSMIME
Expected minimum version: 3.17.2 Basic ECC
Version in use: 3.17.2 Basic ECC
NSSSSL
Expected minimum version: 3.17.2 Basic ECC
Version in use: 3.17.2 Basic ECC
NSSUTIL
Expected minimum version: 3.17.2
Version in use: 3.17.2
Experimental Features
---------------------

hello, first please make sure that the date, time & timezone are set correctly on your system. if this doesn't solve the issue (or it is already set properly), a possible solution depends on different factors:
* what is the '''error code''' shown under ''technical details'' on the error page?
in case the error code equals ''sec_error_unknown_issuer'', please attempt to add an exception on the bottom of the error page & inspect the certificate (see the screenshot attached for instructions):
* which '''issuer information''' does the certificate contain?
thank you!
[["This Connection is Untrusted" error message appears - What to do]]

My FireFox Keeps Saying This Connection Is Untrusted

It Happened After I Reset FireFox.

hello, first please make sure that the date & time is set correctly on your system. if this doesn't solve the issue (or it is already set properly), a possible solution depends on different factors:
* what is the '''error code''' shown under ''technical details'' on the error page?
in case the error code equals ''sec_error_unknown_issuer'', please attempt to add an exception on the bottom of the error page & inspect the certificate (see the screenshot attached for instructions):
* which '''issuer information''' does the certificate contain?
thank you!
[["This Connection is Untrusted" error message appears - What to do]]

"This connection is untrusted" for any website I try to visit

Trying to access any website and I get the "this connection is untrusted" error come up.
Sites like the FireFox addons, Facebook, Tumblr, etc etc.
I've tried adjusting my date and time (although it already is on the correct date and time..) and still, nothing.

Example:

Every time I try to log into ANY website that is secured, I get an error message "This connection is untrusted."

The error message is:
This Connection is Untrusted
You have asked Firefox to connect securely to www.facebook.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.
www.facebook.com uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer)
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.
Steps I have take so far:
Verified that system clock is correct
Cleared all cache, history, cookies, etc.; didn't help
Started Firefox in Safe Mode; didn't help
Disabled all Firefox extensions; didn't help
uninstalled and reinstalled Firefox using Control Panel; didn't help
Ran Microsoft Safety Scan for malware; nothing was found
Other information:
This problem exists ONLY in my user profile and ONLY in Firefox. All 5 other users can run Firefox with no problem. I can run IE and Chrome with no problem.
Problem exists in ALL secured (https) sites.
I use Avast and Windows Firewall. Had never heard of ESET or BitDefender before searching these forums.
A lot of the sites don't give me the option to Make an Exception. The two that I tried to make exceptions for, still wouldn't open.
Run Windows 7 64-bit

unfortunately the fiddler2 issuer in certificates might be a sign of unwanted software present on your pc that is intercepting secure network traffic. please go into the system control panel and uninstall programs like BrowserSafeguard, BrowserSafe, SafeGuard or other software that sounds suspicious and didn't get installed by you intentionally.
 reference: https://support.mozilla.org/en-US/questions/982532#answer-520145
afterwards, run a full scan of your system with different security tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes] & [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner].
[[Troubleshoot Firefox issues caused by malware]]

How do I disable "this connection is untrusted" I visit the same web site mutiple times in a day visit I get this same error, these are trusted sites within my work

How do I disable "this connection is untrusted" I visit the same web site mutiple times in a day and every visit I get this same dam error, these are trusted sites within my work environment. This is getting really old, and I am thinking that I should just uninstall, which is a pity becuase I do like firefox

Okay, before you copy 'n paste canned responses, you should read the post first.
'''The date & time on my computer is correct''' I've already checked this.
'''I don't give a damn why the site is untrusted''', I probably know why in fact (behind corporate proxy server).
As for exporting a known good certificate from another browser, sure good idea, but it doesn't seem to work. I tried exporting from IE, Firefox did the import without complaint, but it still complains. At any rate, I don't care about that. '''I just want to permanent disable it for ALL SITES for ALL TIME'''. Is that too much to ask for?
Judging by the number of posts on this topic, apparently I am not the only one complaining about this.

This connection is untrusted with Error code: sec_error_unknown_issuer.

Hello,
When I try to open G-Mail & twitter and some other trusted websites, I got the following warning "This Connection is Untrusted" with Error code: sec_error_unknown_issuer.
For most of the site, I can bypass by clicking « I understand the risk » but this is a bummer but for Gmail and Twitter, there is no other button than "Get me out of here"
When I go through « about:support » and « reinitialise » system, I no longer have the problem, but not only it erases all my personnal set-up but the problem always come back when I restart my system
Date and time are set right.
I have also tried to reinstall completely FIREFOX to no avail
I am using McAfee Total protection 2014 & Firefox 31.0 on Windows 7 64 bits.
I have had this problem for the last 5 days and only Firefox.
Other Browser ( IE8.0) is working fine
I have searched for solutions but they all failed -
Deleting cert8.db did not solve the problem either
How do I solve this Problem?
Thanks and Regards

You can check the connection settings.
*Tools > Options > Advanced > Network : Connection > Settings
*https://support.mozilla.org/kb/Options+window+-+Advanced+panel
If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.
See "Firefox connection settings":
*https://support.mozilla.org/kb/Firefox+cannot+load+websites+but+other+programs+can
Do a malware check with several malware scanning programs on the Windows computer.
Please scan with all programs because each program detects different malware.
All these programs have free versions.
Make sure that you update each program to get the latest version of their databases before doing a scan.
*Malwarebytes' Anti-Malware: http://www.malwarebytes.org/mbam.php
*AdwCleaner: http://www.bleepingcomputer.com/download/adwcleaner/ http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml
*SuperAntispyware: http://www.superantispyware.com/
*Microsoft Safety Scanner: http://www.microsoft.com/security/scanner/en-us/default.aspx
*Windows Defender: http://windows.microsoft.com/en-us/windows/using-defender
*Spybot Search & Destroy: http://www.safer-networking.org/en/index.html
*Kasperky Free Security Scan: http://www.kaspersky.com/security-scan
You can also do a check for a rootkit infection with TDSSKiller.
*Anti-rootkit utility TDSSKiller: http://support.kaspersky.com/5350?el=88446
See also:
*"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

I am continuously recieving the same error message (this connection is untrusted)

When I try to access my emails (Gmail) I recieve this error message; what should I do? My laptop PC is a Windows Vista and Firefox is 33.0. My laptop currently runs Kaspersky Internet Security 2015 as protection.
This Connection is Untrusted
You have asked Firefox to connect securely to mail.google.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.
mail.google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. (Error code: sec_error_unknown_issuer)

What about on https://www.google.com/ ? Can you load that? If so, take a look at the "Issued by" section by clicking the padlock in the address bar, then "More Information" then "View Certificate".

Why am I getting the error "This connection is untrusted" in Firefox on my new computer?

Many familiar sites are giving me an error relating to certificates. See message below:
"This Connection is Untrusted
You have asked Firefox to connect
securely to www.xxxxxxxxxxxx.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."
The same sites are still working perfectly on an older computer without these issues. They also work in other browsers, but Firefox is my default.

As there have been no further responses to this thread, I've finally marked Google Chrome as my default browser on both computers.

This Connection is Untrusted Error

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