I was trying to update Firefox esr deployed in my company's citrix environment from 52.7.3 (32-bit) version to latest released 60.2.0 and it opens up an extra tab of https://www.mozilla.org/privacy/firefox/ page with a warning "Your connection is not secure" along with my set homepage. its been like this since April release Firefox 60.0.1 ESR so I'm still stuck with old 52 version. I use customized config file and tried adding lines such as lockPref("browser.newtabpage.activity-stream.aboutHome.enabled", false); as suggested on some forums but nothing seems to work for me.