PR_CONNECT_RESET_ERROR since newest version of Firefox 91.0
Since I updated to Firefox v.91.0 I get this error:
Secure Connection Failed
- An error occurred during a connection to support.mozilla.org. PR_CONNECT_RESET_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.
when ever I try to connect to websites via Firefox only. I've tried many things like reinstalling Firefox and I know its an issue between Firefox and my Antivirus (Kaspersky,) but this didn't happen before Firefox updated to v.19.0 though. I've tried https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can and many other things but nothing works to fix it. I've switched certificate stores and other 'fixes' I've read on this website and others to no avail. It does this with or without any extensions in Firefox.
This only started when I updated Firefox to version 91.0. It doesn't give an errors/issues on any other browser I've tried so far (MS Edge and Chrome) so must be something with the version 91.0 update?
Any ideas to fix this would be great. Thanks!
Modified by Icarus
Chosen solution
I was able to fix it myself (well it fixed itself somehow.) I fully reinstalled Firefox for a third time and all is working now. Not sure why it suddenly worked this way as I had tried reinstalling it before the same way as this last time. Thanks for trying to help.
Read this answer in context 👍 0All Replies (6)
Bing search https://www.bing.com/search?q=PR_CONNECT_RESET_ERROR This simply means, that the peer or some middlebox in between (firewall) is terminating the connection.
There is security software like Avast, Kaspersky, BitDefender, and ESET that
intercept secure connection certificates and send their own.
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
Websites don't load - troubleshoot and fix error messages
http://kb.mozillazine.org/Error_loading_websites
Icarus said
. . . and I know its an issue between Firefox and my Antivirus (Kaspersky,) . . .
Update Kaspersky. If the problem continues, disable it.
I tried steps outlined in your first post to no avail if you read through the link I provided on the community support page.
If I disable Kaspersky I have no protection, which doesn't solve my issue at all as I need an AV...
Modified by Icarus
Disable it as a test. If the problem is gone, check with Kaspersky support.
Chosen Solution
I was able to fix it myself (well it fixed itself somehow.) I fully reinstalled Firefox for a third time and all is working now. Not sure why it suddenly worked this way as I had tried reinstalling it before the same way as this last time. Thanks for trying to help.
That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems. Go to that post and click the 'Solved' button to its right.
It could have been a corrupted fire that was removed.