Unable to login in webfig linux fedora

Hi

I have updated my mikrotik 450G version from 5.2 to 5.7 its working fine with windows I able to access webfig from windows browser, When I want to access from Linux Fedora system id does not working only upto login when I am hitting user name and password its not getting forward, any solution regarding this issue.

WFM. I’ve never used anything but my Fedora (currently F15) based WS to administer a RB750G, using either webfig (and Firefox) or ssh. This is with RouterOS versions from 4.17 through the current 5.7.

What version of Fedora? What browser are you using? Are you connecting using HTTP or HTTPS? What plugins/extensions do you have installed? When you upgraded the router did you change any other configuration? HTTPS certificates? IP address? …

I am using Fedora-9 and browser is mozilla firefox I am trying to connect with HTTP I did not change any configuration on Router only updated the Firmware.