Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox will not open websites after windows updates

  • 6 respostas
  • 0 have this problem
  • 1 view
  • Last reply by techguy150

more options

Every time windows updates, Firefox will not open websites and gives Secure Connection Failed error, even website to download Firefox. Edge and Chrome open the websites fine. Last time I downloaded earlier manual install Firefox and it would open the websites fine, but it would not update when prompt came up saying update available. Windows just updated and most of the websites I need/use will not open in Firefox, even the federal government websites like USPS.com. It is getting to be too much hassle and I am considering to change main browser, even though I like Firefox (when working properly) better than the others. "Fixes" I found with internet searches do not work. Firefox was upgraded to 105.0 (64-bit), the latest version according to website. (Note: Had to download using Edge, Firefox gave Secure Connection Failed error when clicked on download button.)

Every time windows updates, Firefox will not open websites and gives Secure Connection Failed error, even website to download Firefox. Edge and Chrome open the websites fine. Last time I downloaded earlier manual install Firefox and it would open the websites fine, but it would not update when prompt came up saying update available. Windows just updated and most of the websites I need/use will not open in Firefox, even the federal government websites like USPS.com. It is getting to be too much hassle and I am considering to change main browser, even though I like Firefox (when working properly) better than the others. "Fixes" I found with internet searches do not work. Firefox was upgraded to 105.0 (64-bit), the latest version according to website. (Note: Had to download using Edge, Firefox gave Secure Connection Failed error when clicked on download button.)

All Replies (6)

more options

Hi Steve,

Underneath the error "Secure Connection Failed" message there should be a section called "Error Code:"

Could you provide me with what that error code is? This will help us better determine what's causing this issue.

Thank you~!

more options

For the websites that will not open, the error code listed is PR_END_OF_FILE_ERROR.

Some websites still open fine.

more options

See this article (remove the blank space in the link).

https://appuals. com/pr-end-of-file-error/

more options

Most all of the "causes" listed should have given same error before the Windows update if they were the culprit. While reviewing the info link you sent, notice of .Net framework update popped up. After the .NET framework update installed, the websites started opening properly. Thanks so much for your help!

more options

The next time Firefox was started the websites would not open, back the the PR_END_OF_FILE_ERROR.

more options

Check virtualization settings and clear the virtual cache, if your Internet security software includes this feature, or visit the software provider's support site for more help. Firefox may fail to start for some Windows users after updating, if AVG or AVAST antivirus is installed.