I had a similar problem - still not sure what caused it or how it fixed itself.
I am using Firefox 84, Kaspersky 21.3.
Kaspersky updated itself and I could not open anything in Firefox (everything worked fine in other browsers). I went through this thread, checked every option mentioned, turned on the option to stop checking encrypted connections.
Then I saw that my Firefox version was out of date - updated it to the recommended 87 and now (knock on wood!) everything is back to normal.
"Error while scanning the encrypted connection with" for every website!
in Kaspersky Security Cloud
Posted
I had a similar problem - still not sure what caused it or how it fixed itself.
I am using Firefox 84, Kaspersky 21.3.
Kaspersky updated itself and I could not open anything in Firefox (everything worked fine in other browsers). I went through this thread, checked every option mentioned, turned on the option to stop checking encrypted connections.
Then I saw that my Firefox version was out of date - updated it to the recommended 87 and now (knock on wood!) everything is back to normal.