[Fix] “Secure Connection Failed” Problem in Mozilla Firefox Web Browser

Today when I was trying to open a few HTTPS websites such as Google, Facebook, Twitter, etc in Mozilla Firefox web browser, I was getting “Secure Connection Failed” error message. None of the HTTPS websites were opening for me. I tried to clear cache and cookies in the browser. I also tried to create a new user profile in Firefox but all in vain. I even tried to completely uninstall and then reinstall Firefox web browser but it didn’t help in fixing the annoying issue. I was still receiving “Secure Connection Failed” error message on all HTTPS websites.

Secure_Connection_Failed_Problem_Mozilla_Firefox.png

After a few minutes of research, finally I was able to fix the problem. The culprit behind this problem was ESET NOD32 antivirus program. If you are also using ESET NOD32 antivirus or security suite and facing “Secure Connection Failed” problem in Mozilla Firefox web browser, this tutorial can help you in solving the issue.

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Sometimes ESET security products can’t import root certificates properly after installation or upgrading to a new version. When it happens, HTTPS websites with SSL certificates become not accessible and start throwing “Secure Connection Failed” error message in Mozilla Firefox web browser.

To fix this issue, we just need to reset SSL scanning feature in ESET products which can be done with the help of following simple steps:

1. Open ESET product main window by clicking on its icon in system tray.

2. Now press F5 key to launch Advanced Setup window.

3. Now click on Web and Email link in left-side pane and then in right-side pane click on SSL/TLS to expand it.

4. Now you need to turn off “Enable SSL/TLS protocol filtering” option. Click on the slider near the option and it’ll set it to ‘x‘ mark which means the option has been disabled.

Disable_SSL_TLS_Protocol_Filtering_ESET_NOD32.png

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After turning off the option click on OK button to apply changes.

5. Now again press F5 key to launch Advanced Setup window. Again click on Web and Email link in left-side pane and expand SSL/TLS in right-side pane.

Now turn on “Enable SSL/TLS protocol filtering” option. Click on the slider near the option again and it’ll immediately enable the feature.

Enable_SSL_TLS_Protocol_Filtering_ESET_NOD32.png

After turning on the option click on OK button to apply changes.

That’s it. Now try to open HTTPS websites in Mozilla Firefox web browser and it’ll work fine without any problem.

If the problem still persists, you can try to restart your computer.

Also Check:

Published in: Mozilla Firefox, Troubleshooting Guides

About the author: Vishal Gupta (also known as VG) has been awarded with Microsoft MVP (Most Valuable Professional) award. He holds Masters degree in Computer Applications (MCA). He has written several tech articles for popular newspapers and magazines and has also appeared in tech shows on various TV channels.

Comments

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  1. I have the same problem with Firefox but I am using Kaspersky antivirus program do you have a remedy for that
    thank-you keep up the good work

  2. ^^ Try to disable WWW or similar Internet safety feature in your security program. If it contains any option related to SSL, disable it.

  3. I fixed the issue:

    1. Open up Computer and and then Organize and Folder Options.
    2. Make sure you have “Show hidden files, folders, and drives” box checked
    3. Make sure you have “Hide protected operating system files (Recommended)” box unchecked.
    4. Open up Firefox browser and Options, then navigate to Advanced tab and then to Certificates tab.
    5. Click on View Certificates
    6. New window appears, now select Authorities tab and then Import button
    7. Navigate here: C:\ProgramData\Kaspersky Lab\AVP17.0.0\Data\Cert
    8. Now import file called “(fake)Kaspersky Anti-Virus Personal Root Certificate.cer”
    9. New window appears, make sure you check all 3 boxes
    10. Then just hit OK
    11. Try to open up https based website, website opens up correctly

  4. Internet bankieren KBC werkt niet, krijg foutmelding “BEVEILIGDE VERBINDING MISLUKT”
    Mijn virusscanner is ‘BIT DEFENDER’
    KBC helpdesk heeft geen oplossing, men vraagt de virusscanner uit te schakelen en opnieuw te proberen in te loggen.
    Kan de virusscanner niet uitschakelen, dit is niet mogelijk bij bit-defender.
    Een internet bankieren site opstarten zonder virusscanner is naar mijn mening zeer gevaarlijk.

    Is er een oplossing voor bit defender?

  5. Always interesting to read tips. My I.T. pal suggests there could be a deeply hidden virus, despite AVG and SUPERantispyware scans. Nowhere could I find the SSL box and the F5 key didn’t appear to be relevant, as nothing happened. Had aleady tried the Certificates option suggested above – couldn’t get it to enter the – suddenly – blocked site. BTW, AVG will not save any Skype URL exception, nor web.skype – am receiving insecure messages via Firefox, Chrome and Opera, despite skype now being owned by MICROSOFT… HUH?

  6. I either can’t follow these directions or don’t understand them. Can I please have my old firefox back!?? System restore didn’t even work. I use Avast, and when I press F5 nothing happens. I can’t get my email, facebook, anything even firefox has an error message. This all started tonight. I really don’t want to fix, what wasn’t even broken!
    Someone please help. I typed in ESET NOD32 and my computer didn’t know what that was, except for web search.
    thank you, Noel

  7. did not work, started ~ December 2017
    FireFox about to be Dumped
    Secure Connection Failed
    The connection to was interrupted while the page was loading.
    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.
    Learn moreā€¦ (what I need to take a course to use the net)

  8. cannot access natwest online banking log in page all I get is,Secure Connection Failed,

  9. I was recently unable to connect to any https site with Firefox Quantum, even Google and Gmail. Read on another site to remove HSTS.plist from Profile folder. It worked! Not sure how necessary this file is, but Firefox appears to function perfectly well without it, and I can access all sites.

  10. 4/10/2018. I made the mistake of downloading the latest version but I’m just a regular guy and I don’t even know the basics of how to start doing these fixes. It;s a shame but firefox in it’s present state is unusable to me. I can’t even do a basic internet search. Much to my sorrow I have to go back to msnat least for awhile. I hope to return when this problem is resolved or when I can download a fix.

    Thanks for all the advise. I wish I knew enough to use it.

  11. The connection to sbicard.com is interrupted while the page is loading.

    The page I am trying to view cannot be shown because the authenticity of the received data could not be verified.
    Please help me in this regard.

  12. ^^ Clear cache and cookies in your browser and then check again. Also try with a different browser.

  13. I am using Avast Free and cannot open any attachments. I keep getting Secure Connection Failed. Also Avast is stopping the attachment as being malware. Any suggestions?

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