I am getting the error SEC_ERROR_UNKNOWN_CRITICAL_EXTENSION on every page i open. I have looked around and tried to fix it using similar error messages but nothing has worked. I have uninstalled and reinstalled but nothing has worked.
Can anyone help me as there is nothing online that i can find that will fix this.
All Replies (5)
Do you have an example of a website where this is happening?
There's an unresolved discussion in an old thread.
Are you using a proxy or VPN?
You can check the connection settings.
- Settings -> General -> Network: Connection -> Settings
If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.
See "Firefox connection settings":
Tried all fixes on this and none work. Damn annoying.
Just a quick update. I downloaded version 77 and it works fine. I then re-downloaded version 101.1 and it worked. although i got the error SEC_ERROR_UNKNOWN_ISSUER on all sites. I then followed another fix where i went to about:config then security.enterprise and changed this to true.
All good. Well so far!!