"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:

Similar Messages

Firefox always asks for a username/password from a proxy for any website I try to visit. "No proxy" is selected.

Firefox is installed on my work computer (v16 on windows XP). When I go to any unsecure website, I get a request for a username and password from a proxy. I don't have one, so I press "cancel." I get the following message (I put the asterisks in):
"This Page Cannot Be Displayed
Authentication is required to access the requested web site ( *******-webproxy ). A valid user ID and password must be entered when prompted.
If you have questions, need assistance with your login information, or feel this is an error, please contact your corporate network administrator and provide the codes shown below.
Notification codes: (1, WWW_AUTH_REQUIRED, *********-webproxy)"
The website in the address bar is: http://*******-webproxy/B0000D0000N0001F0000S0002R0004/http://www.whatever.com/
This started after it upgraded (to which version, I don't remember). I also had another version of firefox installed to my "Local Settings" directory since I can't (un)install programs on the computer. That one was working fine until I upgraded to v.15 or v.16 (or maybe 14... I don't remember), and then I started getting the warning screen for an untrusted connection whenever I went to a secure website (https), I had to confirm a security exception, etc. And even then some pages only appeared as text.
I uninstalled that version, and then installed 17b4, and I'm back to the same problem as the original firefox: unsecure websites always seem to be redirecting through a proxy, and secure ones always tell me the connection is untrusted and I have to confirm an exception. I have "No proxy" selected in the network options. I tried v16 with the same results.
I would love to be able to just go to a website and not have to confirm security exceptions or get web proxy errors.
Internet Explorer works fine, btw.

Not sure from your example but it appears that the address doesn't have a full domain, i.e., the part between http:// and the next / is not a valid internet domain name, e.g.,
http://sometext-webproxy/
In that case, it's probably something running on your computer, either as part of your security software, or as a Firefox add-on, or malware.
A standard diagnostic to bypass interference by extensions (and some custom settings) is to try Firefox's Safe Mode.
First, I recommend backing up your Firefox settings in case something goes wrong. See [[Backing up your information]]. (You can copy your entire Firefox profile folder somewhere outside of the Mozilla folder.)
Next, restart Firefox in Firefox's Safe Mode ([[Safe Mode]]) using
Help > Restart with Add-ons Disabled
In the dialog, click "Start in Safe Mode."
If you can access sites normally, this points to one of your extensions or custom settings as the problem.
To also disable plugins, you can try here:
orange Firefox button ''or'' classic Tools menu > Add-ons > Plugins category
Any change?

Why does Firefox say "This Connection is Untrusted" for most websites?

Firefox tells me the connection isn't trusted for pretty much every site I attempt to go to. I can't bypass it and I have tried everything I read in the support articles, changed settings, resetting and restarting etc. Nothing works. Please help!

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 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.
* Name associated with your security software, such as ESET, BitDefender, etc.
* FiddlerRoot (usually indicates unwanted software being installed named similarly to BrowserSafeguard, BrowserSafe, SafeGuard; see [/questions/982532#answer-520145])
* Sendori (indicates unwanted software from Sendori; see [/questions/861138])

Problems with receiving error message "This Connection is Untrusted" for any https sites. On version 17.0.1 of firefox. IE does not get error.

whenever I go to an https site, I get this error message. My other browsers are not having the same issue. I deleted cert8.db as one site suggested. Stopped using firefox due to this issue. example: www.comcast.net, once I sign into email, I get this error message. Amazon.com - same issue. So, these are very common sites. This only started in past two weeks.

Does updating to Firefox 18 (which comes out today) help? It fixed a few issues with certificates.

I got "This connection is untrusted," on a website I visit everyday. I wasn't given any options to choose for a solution.

I tried to log into a site that I use on a daily basis for my freelance writing. In the middle of the page - where it lists my reports - is a box that says, "This connection is untrusted." I read some other Help articles and one said there should be three options, one which allows me to continue. In my instance, there were no options to do anything to continue or to leave the page.

I don't know what an iframe is. When I right-clicked, it said that this website does not supply ownership information.

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]]

I get "This Connection is Untrusted" on every website?

I've uninstall firefox and changed the time and I can't get the bowser to work. Every single webpage gets the This Connection is Untrusted message. Every website gets the error message (Error code: sec_error_unknown_issuer). I don't have any problems with IE only firefox won't work. I just bought the computer 2 days ago so im sure its not a virus. I have Kaspersky internet security

It didn't work. I could not find KasperskyAnti-VirusPersonalRootCertificate in firefox. I have windows 8.1 so I don't have a start button. I made hidden folders viewable from the control panel, but I couldn't find the certificate

Firefox says this connection is untrusted for every single site! HELP!

Every website that I have visited, says the connection is untrusted. This is getting extremely frustrating. Help will be greatly appreciated!.
Here is my firefox info:
"application": {
"name": "Firefox",
"version": "26.0",
"userAgent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0",
"supportURL": "https://support.mozilla.org/1/firefox/26.0/WINNT/en-US/"
"modifiedPreferences": {
"browser.cache.disk.capacity": 358400,
"browser.cache.disk.smart_size.first_run": false,
"browser.cache.disk.smart_size.use_old_max": false,
"browser.cache.disk.smart_size_cached_value": 358400,
"browser.startup.homepage_override.mstone": "26.0",
"browser.startup.homepage_override.buildID": "20131205075310",
"extensions.lastAppVersion": "26.0",
"network.cookie.prefsMigrated": true,
"places.history.expiration.transient_current_max_pages": 73687,
"privacy.sanitize.migrateFx3Prefs": true
"graphics": {
"numTotalWindows": 1,
"numAcceleratedWindows": 1,
"windowLayerManagerType": "Direct3D 10",
"windowLayerManagerRemote": false,
"adapterDescription": "AMD M880G with ATI Mobility Radeon HD 4250 ",
"adapterVendorID": "0x1002",
"adapterDeviceID": "0x9712",
"adapterRAM": "256",
"adapterDrivers": "atiu9p64 atiuxp64 atiu9pag atiuxpag atiumdva atiumd6a atitmm64",
"driverVersion": "8.770.2.1000",
"driverDate": "9-19-2010",
"adapterDescription2": "",
"adapterVendorID2": "",
"adapterDeviceID2": "",
"adapterRAM2": "",
"adapterDrivers2": "",
"driverVersion2": "",
"driverDate2": "",
"isGPU2Active": false,
"direct2DEnabled": true,
"directWriteEnabled": true,
"directWriteVersion": "6.1.7601.17514",
"webglRenderer": "Google Inc. -- ANGLE (AMD M880G with ATI Mobility Radeon HD 4250 Direct3D9Ex vs_3_0 ps_3_0)",
"info": {
"AzureCanvasBackend": "direct2d",
"AzureSkiaAccelerated": 0,
"AzureFallbackCanvasBackend": "cairo",
"AzureContentBackend": "direct2d"
"javaScript": {
"incrementalGCEnabled": true
"accessibility": {
"isActive": false,
"forceDisabled": 0
"libraryVersions": {
"NSPR": {
"minVersion": "4.10.2",
"version": "4.10.2"
"NSS": {
"minVersion": "3.15.3.1 Basic ECC",
"version": "3.15.3.1 Basic ECC"
"NSSUTIL": {
"minVersion": "3.15.3.1",
"version": "3.15.3.1"
"NSSSSL": {
"minVersion": "3.15.3.1 Basic ECC",
"version": "3.15.3.1 Basic ECC"
"NSSSMIME": {
"minVersion": "3.15.3.1 Basic ECC",
"version": "3.15.3.1 Basic ECC"
"userJS": {
"exists": false
"extensions": [
"name": "AVG Security Toolbar",
"version": "17.2.0.38",
"isActive": false,
"id": "avg@toolbar"
"name": "GreatArcadeHits Add-on",
"version": "1.0.0",
"isActive": false,
"id": "{B21F5E31-B8E8-41CD-B74C-168A71A10E49}"
}

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
*http://kb.mozillazine.org/Error_loading_websites
Do a malware check with some 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: Home Page: http://www.microsoft.com/windows/products/winfamily/defender/default.mspx
*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

This Connection is Untrusted for Outlook mail

I get this error message anytime when I try log in on mail.live.com using my email [email protected] but when I use secondary account email address I can log in without any errors. Nothing has change exempt my email addresses. I have tried all other fixes which have been posted to fix this problem. When I look into more about the error, I notice Firefox was trying to log in to my yahoo mail account, which is mail.yahoo.com. Why is Firefox trying to log in on yahoo when I typed in live.com URL.
This just started couple weeks ago, up until then I could log in to my live.com account. No virus or malware or time wrong. I get the like error message with IE and Chrome. Where is problem and how to fix??

When you log in to a Live Mail (Hotmail, Outlook.com, etc.) account, you should always be on this domain:
https://login.live.com/login.srf
Then the site will redirect to a particular server, such as
'''col125'''.mail.live''.''com
It's possible that your accounts are on different servers and that one of them has a certificate Firefox finds disagreeable while the other one is fine. If the problem is with the following server, please see the linked threads for suggestions:
'''bay174'''.mail.live''.''com
* [https://support.mozilla.org/questions/1033421 I get the message "Untrusted Connection" just with Firefox; not with IExplorer]
* [https://support.mozilla.org/questions/1019979 Hotmail untrusted connection,why?]

Why does Firefox send scary warning "This Connection is Untrusted" for URLs that I know are OK?

Example: I try to log on to renew automobile registration at www.DMV.state.pa.us or other innocuous locations and I receive that scary warning. So I log in on Explorer on my PC and the website works OK. Am I doing something wrong?

as far as I know, you are not doing anything wrong. I get the same message for some government managed pages. I believe it has to do with who furnishes their certificates.
Firefox has a article that explains security certificates here:
http://support.mozilla.com/en-US/kb/This%20connection%20is%20untrusted

Firefox Nightly keeps bugging me with "This Connection is Untrusted" on every single site I visit

So I am trying out the new FireFox Nightly, as it was suggested by a friend to me. Now I am liking it at first, but when I remove all my old FireFox stuff (completely uninstalled as there was alot of useless junk/plugins/data that I wanted gone) I am now getting this "This Connection is Untrusted" message on every single site I visit! It even says that the mozilla site is dangerous. So is there any way to disable these warnings?

Hello Rykuu, also, check the time and date of your system, if the date and time on the computer are wrong then security certificates may not be valid.
which security software do you have (firewall or/and anti-virus)?
thank you

How to permanently remove "This Connection is Untrusted" notification for all future websites everywhere forever?

Dear Mod/Helper/Whoever
Please read this entire post before answering since it addresses virtually all the most popular "solutions" for this problem and they DON'T WORK.
I've already found this and it was of no use: https://support.mozilla.org/en-US/questions/1015256?esab=a&as=aaq
The moderator's blatant copy-paste response was an insult and not helpful at all.
My system date is ok and the cause of invalid certificate is the LEAST of my concerns. I just want to browse the website and not get ANY warnings about ANY invalid certificates or ANY risks involved, period. All popular workarounds with settings/advanced/validity properties have been tried but none of them fix this for me. I want FF to accept all invalid certificates instantly without notification or warning, no matter what.
I want to remove the warning screen "This Connection is Untrusted" permanently for all future references, so that I don't even see any errors related to it when I browse a website.
I'm not here to argue the merits or lack thereof for this action, I just want to get rid of it.
I'm running a lot of custom software on my comp and I have 3 LAN cards connecting me to 3 different networks with varying degrees of security and this notification is a huge pain in the... back, because it eats my time every day.
I've been using Firefox for years exactly because it didn't have stuff like this in the past - I could visit all the funny/suspicious/malicious websites without problems, where IE would have died 10 times over. Sadly that FF feature began changing to the worse in the past years, an ever-increasing slope downwards for this once great web browser.
I KNOW all the risks involved and I don't care. In fact I encourage websites to try and install "stuff" on my computer because as I mentioned, this is a special computer. I'm visiting 40-50 websites with that prompt DAILY because that's what I do for a living. Every time I have to add an exception is a wasted effort and time. I'm running other browsers as well but FF is my focus due to its popularity.
Please for the love of all that is sacred, provide some sort of workaround for this without the need to install an addon or click "I understand the risks" a gazillion times. An "about:config" variable would be nice but apparently it's not there, I looked.

That is not possible as that would expose you and other Firefox users to unacceptable security vulnerabilities.
The normal procedure is to contact the website maintainer and ask them to fix the certificate chain or install missing root certificates in Firefox and set the trust bits accordingly.
If you do not care about certificates then why don't you install proxy software and use that proxy and let it handle the certificates and import the root certificate of that proxy in Firefox?

I use firefox 3.6.22 and google chrome, my google chrome works perfectly so i know my internet is connected, but when i try to use firefox, i am unable to connect or go into any website. I need to be able to use this firefox for fafsa thank you

I use firefox 3.6.22 and google chrome, my google chrome works perfectly so i know my internet is connected, but when i try to use firefox, i am unable to connect or go into any website. I need to be able to use this firefox for fafsa thank you.

Firefox works fine on Windows 2000 SP4 for me.
Any chance you have a dial-up connection that uses a web accelerator to speed the loading of content?

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]]

As of today I get "This connection is untrusted" message for EVERY website, including all the ones that I've bookmarked and been using for years.

It's not an exception problem, as I get it on all the websites I try to visit and all of these have worked for years.

Who is the issuer of the 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 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" for any website I try to visit

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