Is it this site?

https://onlinebanking.nationwide.co.uk/AccessManagement/Login

That one is working for me (screen shot attached).

During your update, do you recall using Firefox's Refresh feature? This could occur if Firefox displayed a button indicating it was slow and could be sped up using a Refresh or Restore. An Old Firefox Data folder would appear on your desktop in that case. Do you see anything like that?

Thanks for your reply. Your post was a confirmation of what I discovered *after* I posted my message yesterday evening!

I noticed that I had had an email from Nationwide yesterday about savings rates being changed. I tried to logon to Nationwide from that page - and it worked. It was using the URL that you have just suggested above.

The URL that I had been using was https://olb2.nationet.com/default.asp. That still works on FF36, but I notice now that it automatically redirects to the URL that you suggested. FF37 is not able to do that; undoubtedly something to do with certification!

What I didn't realise was that I was using an old URL. Nationwide do tend to change them from time to time without telling their customers.

You ask if I noticed anything during the update. No, I didn't because it was apparently set to do it automatically. Big mistake, and I have changed that now!

Many thanks again for your prompt reply. DavidR

https://portal.nationet.com/nationwide/appforms/RegularSavings/default.aspx

this is in the search bar when i get the error message - can you help a technophobe with plain instructions as how to correct it ... please?

It is usually best to navigate to a login page starting at its home page and not to bookmark a specific page to avoid such issues. A website can always change its layout causing a bookmark to get broken and you may not be aware of this.

You can try this basic URL:

• https://onlinebanking.nationwide.co.uk/

Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

• Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

I get the same error on that page.

Using a test page, the server configuration looks like a problem: https://www.ssllabs.com/ssltest/analyze.html?d=portal.nationet.com

Hopefully cor-el's link will work for you.