This is Firefox2 security issues. By default Firefox 2 disabled the SSL2.0. This caused problem unable to access webpages that are running under SSL2.0 encryption. (eg maxis.com.my to view my bill)
By Following step problem will solve...
Go to location, key in about:configThen, key in security.ssl3.rsa_rc4_40_md5 under filter.
Change it from false to true.