Insecure Connection

[Goofy]

I use Firefox. The last couple of days I've been unable to log in to most sites because I have an insecure connection. I've been logging in to AB, BBC and various others for years! I've had to use Chrome to get anywhere.
Any ideas as to why this is happening, and how to fix it?
The thought of changing my browser, and having to re-enter all my user names and passwords!

[woofgang]

my bt hub does this to me occasionally. Switching the hub off and on again after 5 minutes or so fixes it

[Bertrum]

There have been a number of problems with the latest update of Firefox 60.0.3 it revolves around the TLS security protocol that conflicts with some internet security programs that block certain websites
Not sure this is your problem but if it is editing the configuration file of Firefox should provide a temporary fix
Open a new Firefox window, type in the address bar: "about:config"
Search for "security.tls.version.max". Once found change the value from “4” to “3”
Restart Firefox.
As said this should be a temporary fix until your internet security program is updated and TLS should be returned to its default value

[Goofy]

Thanks Bertrum. I'll give it a go.
Don't think it's teh hub as Chrome OK.

[Goofy]

Unfortunately I've still got the problem. I can't even get on to my home page (bbc.co.uk) !
I'll have to start using Chrome or something.
Not my hub I think as so far Chrome is working, and I have no problems using my phone or tablet.
I might go and stick my head in a cupboard!