Firefox Support Forum

Can't connect with the just downloaded version 66.0.4 to virtually any site - not to Google, not to NYT, not even to Mozilla - Firefox won't accept ANY certificate! Following errors appear (examples): "Did Not Connect: Potential Security Issue Firefox detected a potential security threat and did not continue to addons.cdn.mozilla.net because this web site requires a secure connection. What can you do about it? addons.cdn.mozilla.net has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site. The issue is most likely with the web site, and there is nothing you can do to resolve it. If you are on a corporate network or using anti-virus software, you can reach out to the support teams for assistance. You can also notify the web site’s administrator about the problem.

Or: Warning: Potential Security Risk Ahead Firefox detected a potential security threat and did not continue to www.nytimes.com. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details. What can you do about it? The issue is most likely with the web site, and there is nothing you can do to resolve it. If you are on a corporate network or using anti-virus software, you can reach out to the support teams for assistance. You can also notify the web site’s administrator about the problem.

The explanation is as follows: Someone could be trying to impersonate the site and you should not continue. Web sites prove their identity via certificates. Firefox does not trust www.nytimes.com because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates. Error code: SEC_ERROR_UNKNOWN_ISSUER

No problems whatever with other browsers. I'm sending this with Safari.

Everyone going to the above mentioned website experiences the same annoying reloads. Please add a method to Firefox like IE has that can restrict sites reloading, assuming this doesn't exist already. Thanks

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.

The page Give feedback landing page says: ‘Please check back soon’. What does ‘soon’ exactly mean?

again the shopping cart in aliexpress does not work. there are no addons. in pinterest, and after a while, the computer hangs up.

опять корзина в алиэкспресс не работает. никаких дополнений нет. в pinterest и вовсе через некоторое время намертво вешает комп.

Attached is a sample of how web pages display. These can either initially display this way or, as in this example, the page opened correctly, I stepped away for a few minutes and when I viewed the page again it looked like the example. I can have a page open and it is displaying correctly, then open a new tab and go to a different site and the text will look like the example.

I have cleared the cache, dumped all the cookies. Restarting the browser (I do this many times a day) will fix the current page but eventually another page will display like this.

I running version 84.0.2 64bit on a Mac Pro Mojave. I don't have this problem with other browsers like Chrome or Safari. I never see it on my Windows 10 system.

Some websites do not load if an ad-blocker extension is enabled. In FireFox Windows Browser, how do I disable u block origin on some certain websites? I don't want to disable ad-blocker and then enable it again and again.

For the first time after 10 years, I can no longer access my PNC bank account using Firefox V84.0.2. This problem started just this Sunday Jan 24, 2021. I am using AVG and the Defender firewall. When I try to enter my account PNC tells me that it cannot find the code and tells me to use another browser like Chrome or Internet Explorer which I don't want to do. PNC tell me to contact Firefox as, "It is not their problem." But so far I have found nothing in Firefox to solve the issue whatever is causing it. I need help as I would rather not change browsers.

I have restarted my PC, checked and restarted AVG, checked the troubleshooting program, and reinstalled Firefox, but nothing seems to correct the problem. So where do I go from here?

I'm using Firefox 85. Windows 10. Started happening 2 days ago.

I've come across some sites that are giving me errors, but they work fine in chrome.

Things I've tried:

• Restarting computer
• Restarting router
• Disabling Firefox addons
• Clearing all cookies + history
• Clearing cache

Below is what happens when I try to sign into the Playstation Store. Also getting similar 406 error trying to access Yamazaki Home

Example: When I click "SIGN IN" on the Playstation Store page, I'm met with a 406 error.

These are the headers that are returned.

Response Headers. Cache-Control no-cache, no-store, max-age=0, must-revalidate Connection keep-alive Content-Length 38 Content-Type application/json;charset=UTF-8 Date Sat, 30 Jan 2021 20:01:40 GMT Expires 0 Server nginx Strict-Transport-Security max-age=31536000 ; includeSubDomains X-Content-Type-Options nosniff, nosniff X-CorrelationId c22fffff-05c7-4d2c-81c0-699bbba555c3 X-Frame-Options DENY X-Psn-Correlation-Id c22fffff-05c7-4d2c-81c0-699bbba555c3 X-Psn-Request-Id 8b5177d1681a03522a5a687f9de05f18 X-RequestId 8b5177d1681a03522a5a687f9de05f18 X-XSS-Protection 1; mode=block

Request Headers Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/\*;q=0.8 Accept-Encoding gzip, deflate, br Accept-Language en-US,en;q=0.5 Connection keep-alive DNT 1 Host ca.account.sony.com Referer https://store.playstation.com/en-us/latest Upgrade-Insecure-Requests 1 User-Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:85.0) Gecko/20100101 Firefox/85.0

I am using Firefox and have noticed that when I do a view page source I do not see the current page, but a cached copy. To view the page source I first have to go to options and delete data.

Here is how to reproduce. 1. Go to a website showing changing data 2. Right click and select view page source 3. Examine the page source to see that it shows an older copy of the data, not the current data 4. Go to options and search on the term 'cache' 5. Delete the cached data 6. Go back to view page source and try again 7. Now the page source is the current data seen in Firefox

Hiya:)

I am experiencing weird *deletions* of my saved passwords in the autofill of some sites...

I select the saved u/p and as soon as i press *login*, it clears the fields...

Anybody know what could be causing this?

Thx:)

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.

When When i Click a link in my Gmail it opens with MS Edge I want it to open with firefox. can someone give me step by step instructions on how to accomplish this. my default browser is Fire fox

My Firefox version is 86.0 on Mac. OS Version is 11.2.2 Big Sur.

I found that basically all color rendered in Firefox is more vibrant than Safari and Chrome, maybe Firefox doesn't handles color management right and renders sRGB in full P3 color space, lead to a over saturate color for almost every element on webpage.

Hopes firefox can fix this soon, I love the efficiency and privacy features on Firefox, This is the only bit I found a little uncomfortable.

You can test your browser here: https://cameratico.com/tools/web-browser-color-management-test/ if you have a P3 support Mac or Windows.

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.

When I use Gmail in my up-to-date Firefox under Windows 10 or Linux and type e.g. "Leser und Leserinnen", then exit the draft and reopen it, "und Leserinnen" is gone. This happens to all tested feminine forms ending with "-innen", even irregular or non-existing ones, if they follow the masculine form and " und " (both preceded and followed by exactly one space). The truncation is case insensitive, and when I type the feminine form first, "innen" will be cut, and " und [masculine]" as well. Turning off auto-correction didn't help. Also, when I send a mail containing such a double form, it arrives correctly, but in my sent mails " und [feminine]" is gone. However, when I then open "forward" or "reply" with repetition of the sent mail, the deleted words are back in place. None of this happens when I use another browser or an E-Mail client or the Gmail app on my phone, nor does it happen with other mail providers, not even when using Firefox. I know this sounds weird, as if there were an automatic "politically incorrect maker". But it is exactly what happens. I wonder if anyone can replicate the phenomenon or - even better, find out why it occurs.

So i downgraded to Firefox 55 and i like it. But i hate 1 thing, there is a green line when i watch a YouTube video on my downgraded Firefox. It is on the bottom of the screen, Somebody help me to get rid of the green line?

Hello, It seems that since Firefox updated to 86.0.1 64bit I can not longer play videos on FOX News. I do have uBlock Origin and Privacy Badger and I have used them for years. By trial and error of disabling each of my addons one by one to see which one could be the culprit I found that by turning off uBlock I am able to play Fox News videos. I kept Privacy Badger turned on and it blocks the advertisements and trackers and I can view Fox News videos with that. I would also like to add that I have not changed any settings in my Options. bold text Now I have noticed the same problem with Edge Chromium in viewing Fox News videos and I had to turn off uBlock and turn on Privacy Badger for that browser in order to see them on Edge. I have always used Firefox for years as my default browser. Does anyone else have this problem or do you have any info on whether Fox News has done something with there site to where you can no longer use Adblockers like UBlock. I have no problems with viewing videos on any other website i.e. YouTube. Thank you for your time in reading this and for any info.

Regards

I have a problem with YouTube looking in Firefox. When I go to any channel, the header of the channel is not displayed at all, together with its content, i.e. the name of the channel, banner, links, etc. I checked the code by examining the element and I found something like that

1. header, #search-pva, #premium-yva, #feedmodule-PRO, #video-masthead, #watch-buy-urls, #sub-frame-error, #main-frame-error, #watch7-sidebar-ads, #feed-pyv-container, #shelf-pyv-container, #watch-branded-actions, #watch-channel-brand-div, #homepage-chrome-side-promo, #watch-channel-brand-div-text {

   display: none !important;

}

when I unchecked display none, I saw everything normally after refreshing the page as well. I restarted my browser and didn't see the header again. Someone knows how to fix it, because what if it is a bit disturbing and irritating when you can't see it. You can see everything normally in Chrome. I don't want to use Chrome because I don't like it and this browser sucks in my opinion. Thank you for your help on the screen below :)