FireFox is blocking many sites and says This Connection is Untrusted

many sites is blocked by firefox like facebook , yahoo mail and even this site.
its saying This Connection is Untrusted
and this sites working on other browsers
and i'm sure that the pc date is right and up to date
so what???

I have been having the same problem, chased my tail around for ages and then realised that my system clock was out of date because my laptop battery is toast.
I reset my clock to today's date and the certificate errors disappeared.
Check your clock?

Similar Messages

Ugent help - Every time i go to a secure website firefox latest version says This Connection is Untrusted. This was never there before and now its appearing

Every time i go to a secure website using firefox latest version i get an error saying "This Connection is Untrusted" This was never there before and now its appearing. My computer clock and date is correct and i have tested out all plugins that they are updated. Also did a scan on all viruses and spyware nothing there any help please.

Sorry, I didn't look at all the images.
You can see that the certificate is issued by your security software (Firewall): ESET SSL Filter CA 
So you will have to disable that filter or install the ESET root certificate that chains to that certificate.

Why can't I connect to web sites that require my user name and password. window pops up saying this connection is untrusted.

This Connection is Untrusted
You have asked Firefox to connect
securely to cards.chase.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
cards.chase.com uses an invalid security certificate.
The certificate will not be valid until 5/4/2010 5:00 PM.
(Error code: sec_error_expired_certificate)
I Understand the Risks

Can you post links to pages that give that error?
Did you try to remove cert8.db in the [[Profiles|Profile folder]] or tested with a new profile ?

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

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]]

Website box says, ' this connection is untrusted, can't confirm it's secure'.

I'm trying to open a secure website. a box comes up, it reads:
'this connection is untrusted... can't confirm connection is secure... this sites identity can't be verified... this error could mean someone is trying to impersonate the site.' I called the company and they said it is my browser. I don't know what to do?

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.

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])

I keep getting a message that says "this connection is untrusted" whenever I try to access ANY website

I looked through the previous questions and deleted any suspicious software (there really wasn't any, just a bing toolbar). I deleted firefox and reloaded it. I bought Norton Antivirus and ran a scan - nothing. Date and time on my computer are correct. Explorer works fine. Help! I prefer firefox but I can't access ANY website. I get this message every time.

I already went through all the instructions on the Firefox support forum and nothing worked. The issue can't be the website certificate because it happens for EVERY SINGLE WEBSITE I attempt to access. Regardless, I did add an exception for Facebook per the instructions. That caused a strange, unformatted page to come up. I have since read that to do an exception is dangerous as it can cause MORE unwanted malware to infect the computer.
I did, however, figure it out on my own so maybe this will help people who are experiencing this problem in the future: After reading the past posts from people who experienced the same thing, I realized that in every case, the solution was to remove some sort of unwanted software (malware). I am very careful to NOT download software and I noticed that another victim of this said the same thing so this one is sneaky. I even bought new antivirus software (Norton), ran a scan and the problem was not found.
I went to Programs "uninstall programs," sorted them by date and removed anything that looked suspicious that was recent. I had something with the word, "rocket" in it. It looked like a game. There was also one other program that I removed (can't remember the name of it now). Removing those didn't solve the problem, so I went back through all the programs on my list and removed anything that said "toolbar" on it, even if it sounded trusted (I had a bing and a google toolbar). That didn't seem to work either so I sorted the programs by date again and I noticed that the "rocket" software was STILL THERE.
I right clicked on it and then clicked on "uninstall" again. It takes an exceptionally LONG time for that program to uninstall AND nothing shows up on the screen. The computer just sort of sits there and does nothing. I walked away and when I came back (about an hour later) the program was gone from the list.
Firefox works now. I'm not getting that message anymore, but here's the deal: I am not 100% sure which program was the problem. It was either that rocket software or one of the toolbars. Regardless, the answer always seems to be some sort of unwanted malware so I would recommend that any victim of this problem try uninstalling suspicious programs as a FIRST step. And that means ANY suspicious programs that are RECENT, regardless of whether they look like games or antivirus or whatever. If it's recent and you don't remember downloading it, uninstall it.

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.

I get the "unresponsive script" message now for nearly all sites, and sometimes this is followed by the popup box saying that the "plugin contain for Firefox has stopped working."

Many sites now say that a script is unresponsive. And by unresponsive I mean that the whole browser slows to a crawl and it can take ~20 minutes to get 2 pages loaded.
Also, I sometimes get a popup window saying the the plugin container has stopped working.
This whole issue is making Firefox unusable. I cringe to say it, but I'm currently in IE. :-/

See http://kb.mozillazine.org/Plugin-container_and_out-of-process_plugins

This Connection is Untrusted...I accidently put in the wrong login info and a specific site and now I am blocked from it, how do I unblock this.

After trying to login to a specific website three times, Firefox has now blocked me from this site. "This Connection is Untrusted" I have used this site for many years and need to be able to access it.

Rename or delete the file cert_override.txt (cert_override.txt.old) in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder] to remove all permanent exceptions that you have saved.

Firefox (latest versions) on both Mac 10.6 and Windows 7 show "this Connection is Untrusted" on my bank site

This started for me 1/17/2011 on the savingsbank.com website:
Firefox (latest versions) on both Mac 10.6 and Windows 7 show "this Connection is Untrusted" on my bank site https://www.savingsbank.com
NO other browsers - Explorer, Chrome, Safari - give this error box on this site. Please advise if this has to do with the bank site? or Firefox compatibility.
Saw in a forum someone else having this problem and they were told it had to do with their Date and time being off?? I've been on several computers, all with the correct date and time and they've all shown this Insecure Certificate statement on my bank site with Firefox and no other browser.

I've looked at the banking site with IE8 and it does NOT show me that "This connection is Untrusted" window. (please see attached screen shot of viewing the site with IE8) It opens fine and has "Identified by Network Solutions" showing on the address bar as it always does.
The latest version of Opera (not earlier ones) does show a problem with the website's security certificate.
We've contacted the bank about this, and they say there's no problem with their certificate but are looking into it.
My question remains, why only Firefox and one version of Opera claim this and NO other browser?

I just downloaded the new version of Firefox and now every site I used to use such as Facebook, Twitter, and Youtube show "This Connection Is Untrusted"

I just downloaded the new version of Firefox and now every site I used to use such as Facebook, Twitter, and Youtube show "This Connection Is Untrusted". Even when I do accept the risks the site no longer looks the way it's looked for years. Twitter doesn't even give me the option to accept the risks at all and shows this error (Error code: sec_error_unknown_issuer). I've tried resetting Firefox, I've checked the time and date, and I've removed and added Firefox to see if that would work. Nothing seems to be working so I can see the sites the way they normally would be instead of "coded". Can anybody help me please?!!! Thanks

ok, unfortunately the fiddler2.com 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]]

When I start to download Firefox, I get a message that says "This type of file can harm your computer. Do yiu want to keep Firefox...p7.0.1.exe anyway? What does that mean and in what way can it harm my computer? Do I download it anyway?

When I start to download Firefox, I get a message that says "This type of file can harm your computer. Do yiu want to keep Firefox...p7.0.1.exe anyway? What does that mean and in what way can it harm my computer? Do I download it anyway?

You get that message any time you download an executable file. It is safe to open as long as you download from http://www.mozilla.org/en-US/firefox/new/

In Client Operations Download Computer Policy is listed many times and says Expired.

In Client Operations Download Computer Policy is listed many times and says Expired. I'm not sure how to remedy this.
Thanks
James A+, Network+, MCP

Hi,
When it is set as expired it means that the client has perfomed the task in question and the information in the console is just for historical reasons and will be cleaned out automatically from the Console/DB by one of the Site Maintenance Tasks.
So there is no error and nothing to do in this case just sit back and wait for it to be cleaned up.
Regards,
Jörgen
-- My System Center blog ccmexec.com -- Twitter
@ccmexec

FireFox is blocking many sites and says This Connection is Untrusted

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