userman VS OSV6.15

Got 2 x RB750 with old OS 6.1 and userman was working well upgarde to 6.15 userman not working with Firefox, Chrome or IE 11 or 10

try to figured out why in Firefox and Chrome keep getting messages (Your session has been reset due to inactivity) no luck

In IE 11/10 got login screen but no account working keep getting message (invalide username or password)

check in cli if the account is there with print command and yes all my account are there. Reset router reconfigure everything retry same trouble again.

Finaly i decide to try something weard i install ietab in firefox and try to login in userman with ietab on firefox and now i got login screen
I enter the username and password and Magie everything work and got access back to userman. Witch browser developer use to test module on Mikrotik router?

By the way anyone know at Mikrotik developpement that we are now at Windows 8.1 firefox 30 IE11 Ubuntu 14.04lts Chrome 28 and best of in 2014 years??

Vaccin