It looks that the login input fields are added via JavaScript and the input fields are a Flash object.

So if you do not see them then check that you aren't blocking JavaScript and that Flash is working properly.

• http://kb.mozillazine.org/JavaScript
• http://kb.mozillazine.org/Flash

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

• Do not click the Reset button on the Safe mode start window or otherwise make changes.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

And the form is in an iframe hosted on a different server. Very strange.

If the Flash plugin is disabled then I get normal input fields with autocomplete=off, so the script is able to workaround that.

This worked - thanks