I can't figure out why on sites that I previously regularly accessed on my Windows 8.1 laptop using most recent Firefox browser now display a message that the site is insecure. Most recently this morning it happened with my bank connection which I cannot believe are now suddenly insecure. The notice says that the owner of the site " has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website."
Like I said, this has been happening with other websites but now that I see it is happening with my bank whose site I have confidence in I realize I need to get this figured out. On another site I was able to override Firefox and connect - but on another website it wouldn't override. On the one that I did manage to override the site I couldn't use it because it was impossible to use. I wanted to respond to the site but couldn't ever figure out where or how to do so.
Your insight would be appreciated.