Is that NAB the Australian bank — particularly ib.nab.com.au/login URL?

That one seems to work fine from here, however I can see they're using Akamai/Edgesuite that's been causing trouble across many enterprise websites lately… Do you use any add-ons and could you try with addons disabled?

Thanks for the suggestion -- addons are disabled and it doesn't make a difference -- yet. sometimes I get Page Not Available. Unfortunately this problems seems beyond me to fix. Apparently NAB allows Firefox -- and it nevr was a problem until about 4 days ago. Odd that Chrome browser connects.

Actually I finally realised how to log into the menu and disabled ad block and now I can access thee site and microsoft is also working better -- hoKus pokus?

thanks for your encouragment.