Firefox Support Forum

Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to www.google.com because this website requires a secure connection.

What can you do about it?

www.google.com 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 website, 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 website’s administrator about the problem.

When clicking advanced button there is no way to proceed:

Someone could be trying to impersonate the site and you should not continue.

Websites prove their identity via certificates. Firefox does not trust www.google.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

View Certificate

pleae can anyone see this i need help to find a question of somone who replied but i cant find it on your site there are no links in the email i got directing me to the querstion i can spend so much time on this site tryuing to find the fuycking post i am now just loosing my temper i came here already angrey and i was trying to get help on a serious problem with firefox, but i cant even use your site i cant find the post that a person replied to bueacuse you have no links in the god dam email

When using Firefox (on Windows 10) to open my bank's website, bankofamerica.com, I type 'bofa' and hit Ctrl + Enter which adds "www." and ".com" and then Firefox should load the site. This URL automatically redirects to "www.bankofamerica.com," which is expected. This works fine in Edge and Chrome as well as Safari & Firefox on iOS, but fails with a timeout error in Firefox. Firefox does add the "https://www." and ".com" and attempts to load the site, but it never gets anywhere. I have tested this in FF -safe-mode as well as on two other Windows PCs that had not previously had FF installed.

How do I tell if this problem is with FF or BofA's site?

Hello, I've tried to use google but Firefox won't let me. I have no Idea how to fix this, but had the same problem yesterday and it went away automaticly and now it's back again. Does someone know how to fix this problem permanently?

"Kein Verbindungsversuch unternommen: Mögliches Sicherheitsproblem

Firefox hat ein mögliches Sicherheitsrisiko erkannt und daher www.google.com nicht aufgerufen, denn die Website benötigt eine verschlüsselte Verbindung.

Was können Sie dagegen tun?

www.google.com verwendet eine Sicherheitstechnologie namens "HTTP Strict Transport Security (HSTS)", durch welche Firefox nur über gesicherte Verbindungen mit der Website verbinden darf. Daher kann keine Ausnahme für die Website hinzugefügt werden.

Am wahrscheinlichsten wird das Problem durch die Website verursacht und Sie können nichts dagegen tun.

Falls Sie sich in einem Firmennetzwerk befinden oder Antivirus-Software einsetzen, so können Sie jeweils deren IT-Support kontaktieren. Das Benachrichtigen des Website-Administrators über das Problem ist eine weitere Möglichkeit.

Weitere Informationen… "

Weird thing is, that there clearly is an certificate.

When trying to save PDF's, firefox use to save each file as ex/ document, document(1), document(2) etc... now when trying to auto save it is making me input a name manually and won't automatically add the (#) to each file. How can i fix this?

I had this problem in april, and the fix was given (below) but the link no longer works. Problem started again with a recent update...

Dropa Dropa

   Top 10 Contributor

4/27/22, 9:46 AM

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How about reading this settings that I talked about to see if the save change options changes in what your doing.

FF99.xx and Some tips to make it work. https://support.mozilla.org/en-US/questions/1374212

volume and sound will not work since latest updates 102.00. you tube videos and others will not play sound. Only found solution to uninstall and reinstall but still after some week same error occur.

Where I work I use a state corrections inmate search to get stats on our incoming prisoners. I used to be able to look up the name, get the stats, hit the back button and continue on to the next inmate. Recently when I hit the back button and enter the name, I get an error and have to go completely out of the corrections site and start again. I'll ad that this site does use the "I am not a Robot" security. I do not have this problem in Explorer. What happened? I'd prefer to use Firefox as it is much more secure. Thanks

Went to https://wisc.jobs/Pages/Welcome.aspx to apply for a job. When applying from Indeed to the State of Wisconsin, Firefox goes into a loop whereas the other browsers do not. Trying to click the button to apply for a job only works in other browsers.

Hi,

I recently created a new profile in Firefox as I regularly do, as a consequence I found that the "Page Setup" menu option has been removed in a past release.

I can't fathom why this has been removed, I "print" plenty of PDF's and like to customise the Headers/Footers based on what I'm "printing".

Searching for a fix suggests either installing a 3rd Party Add-on or "hacking" the "about:config". This is not user friendly in the slightest for something that has been around for literal decades.

Forcing a user to install an Add-on or even go through "about:config" and set "print.show_page_setup_menu" to true is bonkers!

Yes, bonkers!

Please restore the "Page Setup" option as default, please don't remove it or stealth hide it.

Sincerely,

Jay

Why I can't get on webpage Doddrv.com.

403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied. Thank you for your time

It seems that since the last update none of the available screen schemes / contrast schemes allow for me to see the input mask boxes. (Of course today with this support page there is an exception but....) I have wasted hours trying to read and adjust and end with only an attitude. HELP

M1 Mac, Macos 12.4

After installing Firefox 102.0 neither of my computers will open Reddit pages. As far as I can tell, all other sites appear to work normally and Reddit functioned before the Firefox update. I restarted Firefox, restarted my computers, deleted Firefox and Reddit history and cache ... nothing so far has solved the problem. Reddit works as expected in Safari.

Any and all suggestions will be appreciated!

After my PC had a blue screen, I reinstalled Windows. Since I use Firefox Snc, I relied on it. Unfortunately, I had to realize that after reinstalling and successfully logging in to fIrefox sync, all my data is gone. He says that he has successfully syncronized, but all bookmarks are missing as well as the settings.

Formula1.com stream does not work with message 'Firefox is installing components needed to play the audio or video on this page. Please try again later.'

Restarting browser, toggling DRM, using private window does not solve this.

While using Firefox I am unable to access two of my online accounts, one for my VPN and one for my Credit Union. So I use Microsoft Edge to access these two websites with no issue. I get this security warning using Firefox: "Secure Connection Failed An error occurred during a connection to www.ftwccu.org. PR_END_OF_FILE_ERROR The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem."

How do I change the background for all webpages to black with letters displayed as white. I have a vision problem which inhibits my ability to view letters on a white background.