I tried to load onlinesbi.com in both Firefox and Internet Explorer, and, although it worked it was very slow to load in both browsers. (It took a good 10 seconds until anything showed.)

I don't see any difference on the site in Firefox compared to IE though, so there seems to be no problems here. Could you clarify this problem with more information, or report back if the problem is already solved?

Unrelated to your issue, it looks like you're using a very old version of Firefox. You should upgrade to the latest version -- just go to the Help menu and click Check for Updates. This link walks you through the process: Update Firefox to the latest release