Z jiného fora:

Dobrý den,obrátil jsem se na forum Mozilly a toto je jejich odpověď:
"Because you are using ESET/NOD32 security/AV the probability is very high it is causing your problems. According to their forums, you should temporarily disable SSL until they solve the problem per https://support.eset.com/en/kb3126-disable-ssl-filtering-in-eset-windows-products?ref=esf - the problem is being reported by dozens of users https://forum.eset.com/topic/26517-problems-with... https://forum.eset.com/discover/"