Bitdefender Tool Bar block internet access on Firefox and Chrome. i wasn't able to browse any webpage through these browser. Sometime it work when i use these browser but it take very long time to load. However, the problem does not happen on Internet Explorer. For now, i have to disable Bitdefender tool bar in order to use Firefox and/or Chrome. Hope to have a fix for it soon. 
PS: Please note that i have updated to most latest build and i am using Bitdefender Internet Security.