Have you already changed the pref browser.xul.error_pages.expert_bad_cert to true?
Marc From: Enterprise [mailto:[email protected]] On Behalf Of Java Sys Sent: Friday, May 11, 2018 7:06 AM To: [email protected] Subject: [Mozilla Enterprise] Firefox 60 esr - unable to access (internal) routers using self-signed SSL certificates - help! Hello, Just trying out the Firefox v60 ESR and immediately hit problems when attempting to access our (internal) router management interfaces which use self-signed SSL certificates for HTTPS access. The error when connecting is Your connection is not secure The owner of 192.168.192.168 has configured their web site improperly. To protect your information from being stolen, Firefox has not connected to this web site. "Peer's Certificate issuer is not recognised." which is true, but could be over-ridden by adding a temporary or permanent security exception in pre-Quantum Firefox versions. For example, using FF v52.* ESR we'd just use the Advanced > Add Exception option very quick, easy, convenient and 'just works'. However FF v60 ESR when clicking the "Add Exception" button - does nothing. So access is denied - without this we are unable to control our internal CISCO routers (which are deliberately made impossible to access from external networks, which is why we don't add permanent credentials to Firefox). Is there a special incantation needed to add the security exception to allow access web servers offered by our routers (for management purposes only) with self-signed (HTTPS) SSL certificates? The routers are all on the 10.*.*.* and 192.168.*.*private networks, if that helps? Kind regards, JS. p.s. The exact version of firefox we are running on our Mac computers is this one (shasum -a 512 and filename): b383043d3bc69a5d76b39ba195c634252a0 Firefox 60.0esr.dmg Alternatively a URL to a suitable (but accurate or specific for CISCO routers) configuration setup tutorial would be fine too; we find the CISCO web-site information a maze of twisty passages all very similar. Hence impossible to navigate and find (useful) information as by the time they have documented their options there will already be new firmware updates making the information non-working in our experience. This is not to knock CISCO we just cannot afford the support contract costs nor find the information on the public web sites they point you to.
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