After wasting nearly 10 hours total I finally got the youtube constantly working on 64-bit firefox (2).
However there is this site www.cib.hu which has this little button at the top-right side of the page under the title "CIB INTERNET BANK" called "Belépés". I just couldn't get the applet it opens to work.
I tried epiphany but the result was the same. I almost thought I had some problems with my ubuntu when I downloaded Opera and it worked like magic.