This automatic addition of HSTS security in 58.0.1 is ridiculous! It has broken most web pages, even Mozilla support and google.com! The BBC news page is shorn of all graphics and trials with earlier versions don't seem to have succeeded . Google.com says: Your connection is not secure The owner of www.google.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website. This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate. Learn more… Report errors like this to help Mozilla identify and block malicious sites' The advanced button just gives: www.google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER. There is no button to give an exception . I'm running 57.0.4 in our other system and that seems to work better (Same Win10 but on Core i5) On this brand new AMDA6 7th Gen Win10 Lenovo running 1709 (Build 16299.192) I'm using IE to send this! I'll be installing 57.0.4 shortly to see if it fixed it. BTW the Add Images is broken. I've taken two screen shots and it won't send them. Just circles without end! I shall be looking for a ver 59 ASAP