Anyone else having issues with Tesco bank logins?

[#1]

I have used online banking for several years with no problems, went to log in to day and it is just sitting there saying "Detecting browser settings"
Their "help" shows M$ & Mac browsers but of course no Linux ones.
This is in FF 19.

[#2]

Works in Opera though 

[#3]

It appears to work correctly in Firefox 20 in Mint 13 (although obviously I'm not going to register).

[#4]

Must be one of my many addons then. Not updated to 20 yet, did you side load it or from a ppa?

[#5]

It was supplied as a standard update in Mint 13 - probably from Ubuntu.
The package is "20.0+build1-0ubuntu0.12.04.3" in precise-updates.

[#6]

Not in mine, strange that. Still running v19 under Mint 13 Mate edition.
Mind you I have the U update stuff disabled. (After it broke my wine install)
EDIT:
OK just checked my update sources and for some reason I had disabled the "recommended & critical" updates 
167Mb to download and FF20 is amongst it.
Thanks mate. Wondered why I hadn't had any updates for a while