In Ubuntu 12.04 I cannot open any websites while e.g. skype works fine or teamviewer and the wired connection is fine since with Windows everything works perfectly :(. I tried to reset Firefox or to use Chrome and nothing changed. Any help is greatly appreciated.
I feel your pain. I've also had to come to terms with Skype on Ubuntu often not being supported (maybe because the market isn't big enough), and websites not getting opened up, but RHUB's Web conferencing / Webinar solution supports Ubuntu. Linux, Unix, etc.