Has stopped working altogether with Firefox. Still works fine in Chrome.
Can't even go to the website in Firefox,Get this message

Secure Connection Failed

An error occurred during a connection to www.myibidder.com. The server rejected the handshake because the client downgraded to a lower TLS version than the server supports. (Error code: ssl_error_inappropriate_fallback_alert)

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the web site owners to inform them of this problem.

It seems like you either use proxy which does it for you or something else.
Myibidder did not downgrade TLS version. Can you see if you can get additional information on what version it sees? Sometimes there is a "More info" button or something like that.

Thanks, but that is the complete error message, no more.
I've been using the firefox addon your years.Now Firefox won't even find www.myibidder.com
It works perfectly on the same PC with chrome or IE

Firefox has its own dedicated network settings, that's why it may work differently on your PC.
Chrome and IE share the same network settings.

This is definitely your local issue, I just want to help you as much as possible.
Can you please provide the full screenshot when you go to https://www.myibidder.com/ ?

---

Last edited on Fri Jan 23, 2015 04:26 PM.

Thanks.
It's now working again, I didn't do anything!

I did not do anything either, so it was definitely something external.
I would check your Firefox network settings in case if something is in the middle of your traffic.