Firefox Support Forum

I am getting a certification issue when trying to visit 2 specific sites which are some of the most visited sites in the web: https://www.google.com and https://www.youtube.com

The error it shows when trying to visit these 2 pages, is SEC_ERROR_UNKNOWN_ISSUER.

I have tried to troubleshoot it and follow the solutions recommended at: https://support.mozilla.org/en-US/kb/error-codes-secure-websites#w_the-error-occurs-on-multiple-secure-sites

however none of the solutions described in this guide worked to solve my problem.

In that guide, one of the suggested solutions is to scan my system for any malware. I used the following: Windows Defender Maleware Bytes AntiMalware Karpersky TDSSkiller however the results are all clean.

In the guide, it suggested that I check the clock as well. The system clock however is synchronized.

Last, I have resetted Firefox Profile but this didnt fix the issue either.

I shall note that the issue appeared yesterday and so far nothing helped fixing it. Not even the system restarts.

The issue about visiting these two sites, is limited only to Firefox.

I can access https://www.google.com and https://www.youtube.com without problems using Google Chrome and the Opera Browser.

Also, Google Mail and Google Translate work fine on Firefox. These two sites can be accessed with Firefox without causing any SEC_ERROR_UNKNOWN_ISSUER errors.

Dear all,

I am planning a move towards the Firefox ESR 78.6.x. Currently my customer is using the Firefox Rapid Release 84.x and need your help with the profile migration. The customer has a very isolated on-premises environment and does not allow the users to login into a Firefox-Account. Therefore the settings for Cookies, Cache, History and especially Bookmarks are not synched.

Environment details:

• Enterprise environment with several tausends of clients
• All clients on Windows 10 Enterprise between 1809 and 20H2
• All clients have always the newest Firefox installed currently 84.x

This creates a huge challenge to sync this stuff. Therefore I have now identified the following two options:

1. 1 Allow the downgrade by using the environment variable MOZ_ALLOW_DOWNGRADE on Windows. For this option I am trying to find the real reason why this "Downgrade-Stop" has been implemented in the first place? What risks in detail do I take to allow this downgrade? Has anybody done this before and do you mind to share your experience here? How many issues did you face and how did you remediate the issues?

1. 2 Hand over the migration to the users. Copy their current profile to their desktop and ask them to import their bookmarks manually. Not preferred by users and I can't even blame them for.

Is there any other way to automatically sync the profiles from 84.x to ESR 78.6.x without user interaction?

Thanks in advance Amir

Reviewed "Sheribee" earlier issue which apparently involved a VPN. I do not have a VPN but have tried several times in the past week to access IRS refund status site without success. I can get into irs.gov, but am unsuccessful in accessing the refund status site after entering required input data. The issue has occurred only this past week.

I'm unaware of IRS issues causing this problem.

Have not had this issue on any other sites; and I have successful retrieved data in prior years.

I am not saving any sign on protocols with the irs or any other sites.

Running Windows 10. Thanks for any help. BTW I did get refund information using the telephone, but I want to ensure there's not a hidden conflict of some sort with FireFox. Thanks for any help.

Dear Community,

I have problem with my Firefox version 86.0 (64-bit). I have Windows 10 20H2 64-bit operating system. Firefox can't load some websites. For example I can load https://allegro.pl/ but I have problem sometimes with this website: https://allegro.pl/myaccount/newpayments_incoming.php

If you go there and use F5 key on keyboard (refresh website) sometimes this can't load. On other browser I don't have this issue. This very frustrated me because I can't work. On Windows 10 1909 on older machine (another computer) I don't have this issue with my firefox (this sam 86.0 version). So this is probably problem only with Windows 10 20H2.

Steps to reproduce:

1) Open new tab and go here: https://allegro.pl/myaccount/newpayments_incoming.php 2) Log in to your account for Allegro website (without account you can't load website) 3) When website loads normally you must refresh this website (F5 key on keyboard) few times (you must be patient, sometimes this can take some time) 4) When website can't load or it's load partly you can see that this stops loading when it try connect to analytics.google.com so I think that it is very strange behavior.

On other browsers on Windows 10 20H2 version this website works without issue. Only with Firefox I have a problem. On Windows 10 1909 version on another machine I can't notice this issue. Also on Ubuntu I don't have any problems with this website with firefox.

Can you fix it? I can't work on my computer with Windows 10 20H2 system. I musted to switch to another browsers (Google Chrome, Microsoft Edge). I contacted with owner of the website but this is not the first problem with Firefox on Windows 10 20H2 so you should fix it. I remember that I had some similar problems on another websites but I don't remember what was address for these websites.

Actual results:

Sometimes I can't load this website on Windows 10 20H2 64-bit: https://allegro.pl/myaccount/newpayments_incoming.php

When website can't load or it's load in a part you can see in the bottom of the browser that this stops when it try connect to analytics.google.com so it is very strange behavior.

This can be not problem only with this website.

Expected results:

I should load this website always: https://allegro.pl/myaccount/newpayments_incoming.php

I hope that you can fix it.

Hi,

I think I broke the ALT keyup events in some way, probably with my configuration but not sure how.

If I put this code in the console : `document.addEventListener("keyup", e=>console.log('alt: '+e.altKey+' | '+String.fromCharCode(e.which).toLowerCase()));` and the press the keys, I have the following results:

- pressing "I", I get the expected "alt: false | i" - pressing "ALT+I", I get "alt: true | �"

I do not have the problem with other modifier keys like CTRL

Hi, Dear Support

Thank you for your browser, it's pleasure to work with mozilla firefox

Please, be informed, that link (https://developer.mozilla.org/ru/docs/Security/MixedContent/FixMixedContent) in page https://support.mozilla.org/1/firefox/87.0/Darwin/ru/mixed-content is not available.

Many Regards

Hello,

I have a problem with login on a few selected sites. On some sites I cannot login at all, on other sites I can log in, but as soon as I don't interact with the website for a few seconds the login is lost and the next click on any link shows me a "not logged in"-state.

For example on my companies Outlook Web Access site, when I enter my account info and click on "Sign In", it briefly shows a loading screen and then takes me back to the login site. On another webiste I can log in and use the website without problems, but not clicking anything for more than ~5 seconds leads to the login being lost. The strange thing is: in incognito mode everything works fine on both sites!?

Firefox is 87.0, I have already deleted all cookies and stored data.

it started from yesterday... when i open firefox after a minute or less the browser suddenly close all tabs and show me a report crash windows. . my windows specifications:

• Windows 10 Pro
• version: 1909
• OS Build: 18363.1440

browser: Firefox version 87.0 (64-bit)

I tried this options but didn't help me and crash didn't stop:

1. open it in safe mode.
2. refresh browser option.
3. disable and delete all extentions.
4. delete cookies and web data button.

. there is some information that i noticed. I unistall and install again and until I didn't sign in to my "firefox account" on the top right corner of the browser, it didn't crashed. but still I want my account, passwords, bookmarks, ect... i sign in and crash started. i goes to appdata and delete firefox folder, start the browser again, my sign in to firefox account disappeared and the browser stopped from crashing. also the crash happened immediately after hitting sync now and happened a few seconds after going to firefox account settings. and it's happening after around a minute when i do absolutely nothing after opening the browser or go to website such as youtube. please help me. even though using another browser is crash-free but i wish to stay using firefox (with my firefox account)

Sir/Ma'am,

My system is a standard install, and when I open Firefox, click Help, About Firefox, and then click the linked word (Mozilla) "Firefox is designed by Mozilla" it takes me to "www firefox com cn" ?

Is the version of Firefox in the Linux repositories the China version with an American facelift?

I know you all do not have command and control of this, but I thought someone should be aware that the default Firefox browser for Linux installs seems to be the CCP Firefox and not American version. With all the CISA activity, it might be something to look into.

Kernel: 5.4.0-70-generic x86_64 GCC v: 9.3.0 Desktop: Cinnamon 4.6.7 Distro: Linux Mint 20 Ulyana Base: Ubuntu 20.04 focal

Firefox for Linux Mint: 87.0 (64-bit)

I am on Mac OS High Sierra Since about a week literally any Russian website I open just crashes Firefox immediately. I have tried to restart in Safe Mode and clear history - it didn't help. What is happening?! Using Chrome in the meantime (no crash there)

Good morning, please help & advise. I am obviously doing something wrong or missing something but I cannot find out how to disconnect my Primary Password which Firefox asked for everytime I click on Firefox. I only want to use the Primary Password when I want to open an excisting connection to a saved folder or site.

I hope I'm making sense.

I try to access my bank website and when I log in the tab says "Something went wrong" and the page tells me Sorry, we couldn't complete your request Sign in to online banking or our mobile banking app to continue. This started on April 1, 2021 Running Firefox v87.0 (64) on Win 10. All apps are current. Tried resetting Firefox, and clearing cache which didn't work. I can sign-in using Edge. Thanks

I use a website (u-bill.com) to access my Product and Account information for software I purchased. To find my purchase I need to enter my email address and 1 of 3 other items of information: Last 4 digits of CC; Order ID Nr; or Password. I am able to enter my email address but the text boxes for the other 3 do not appear. This only happens when I use Firefox as it is my preferred browser. I am able to enter the information in the form using Chrome. A search of possible fixes suggested disabling "hardware acceleration". I tried that and it did not work. Today was the first time I tried to access this information although I have had the account for 1 year so I do not know if Firefox ever was able to access it. I am using Firefox V 87.0 (64 Bit) and Windows 10. Here are two screen shots: #1 is the form using Firefox. #2 is the form using Chrome.

Hi all,

I'm having a repeat of this issue: https://support.mozilla.org/en-US/questions/1291551

Again some links from emails have been giving me the "Warning: Potential Security Risk Ahead" page with the error message "SSL_ERROR_BAD_CERT_DOMAIN". I get this in safe mode but not in private browsing. I have tried all of the fixes suggested last time I asked about this problem including deleting cert9.db but that hasn't worked this time (so maybe it wasn't the fix last time either).

To be explicit, I've tried all fixes on these pages so please don't suggest them again without providing an explanation about why you think it will work (a technical explanation please): https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites 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 https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors

And also this one, which is actually related to the message (none of the above are): https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean#w_ssl-error-bad-cert-domain

Some examples of links that I get this message for: https://click.mail10.smallworldlabs.net/ls/click?upn=4FIN3hZFvI-2BP9iq5nue2vk-2BIMF5sm7TLqXM-2BBHmHs4tQjfdaurWm34ztLj9SPiVE4gseyCl-2FaqSWT59ygV9BpAcDzFkriqc5NC2qBiwl5aOaxL8F5mgo-2BFX-2Fgbi7iwZeFhIlJVBY5pUPWQy6owSYMskwXWDY7Y1aaoMS-2BkHbmCPTNSg29Z4JoYD7fjx9bZW5b2-2Fg5dX2SSuZS5csOf3H6IGmB8UNGulRns8j4EzznpinCvgJxocujRrlszMnMzDFaGlZcc-2BWOcJNASuRsaEH6HcXAoqMnLhDAoAdn0UChLWOY-2FfbP2Ib-2FUEDr6NloUbD-2FnHqHVVYd821nihjMp740-2F5x7GMXZmwRiFR7H2o2PqTC4rmR-2BSqxJ-2BuAl15SvxjWYbO9ClP8PSHw5pY80IikJqK10tVO8wFNKUY0vnffi80-3DW8m3_a4b-2FpboTDHPk-2BrdoYKQMvkNzRfSbL-2BRxE8OVpRrBC237mTF3qcpluLuTnfAWEU7fFwhhtOg-2BbDd1pxD5bmCpb3y8948sPEH5oTF-2Fsg1k82R-2Be5SnCvGNogmdD1MB5K11JV0Ow8rxc63etMs7M6GZzfslGWbxLHW9hydaH2RME5RPXqcBAsIRau-2FizQsq15rW5BclijLm23gWXw-2BvlJjO8gxiJ-2BQwpw2wvKihYGT4DKxPTObnz-2Fpn1ua2ng0ah-2BN1xDub-2Bav5GSEDaq4OPiG8JUArfSPtya-2ByoEn6CzLpZaqsLJ5rbTCztuAV25pOmNhojUORS-2Fnyv8FFlz-2Fh4EX6xolAvA1UgOdaXT3xescKfmROnAvFsYyB88QxIKBXi1-2Br

Web sites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for click.mail10.smallworldlabs.net. The certificate is only valid for the following names: *.sendgrid.net, sendgrid.net

Error code: SSL_ERROR_BAD_CERT_DOMAIN

https://click.topgear.bbc.com/?qs=c719f0befb99016fe4d64e88dc7ec435f7eee7452916295aaa562fc47d530c91af5900c5d298ac67019e3560abca9b8eab0be3a91e8e632f

Firefox does not trust this site because it uses a certificate that is not valid for click.topgear.bbc.com. The certificate is only valid for origin-click.s6.exacttarget.com.

Error code: SSL_ERROR_BAD_CERT_DOMAIN

Please tell me if you need more info. All helpful suggestions much appreciated.

Thanks :)

So basically it has been 2 days since this happened, before update 88; main page of youtube doens't load correctly (only few thumbnails) and only after refreshing it for many times; other browsers load it fine; I did everything I could find and think of, including re-installing clean install, and even restoring windows to a week ago. any ideas or help are appreciated.

Hey Whenever i tried to Open my website unionwellspain in Mozilla Firefox, then I found a lot of space in my blog, as compared in chrome all things space padding is okay, but not in firefox It creates negative impact on users, So Please guide me that How can I solve this issue....

Image attached: https://imgur.com/a/EXAkurj