firefox is [http://www.mozilla.org/en-US/firefox/12.0/system-requirements/ fully compatible with windows 7] - for norton 360 refer to this guide on how to configure it in order for firefox to work properly: [[Configuring Norton 360]]. as for juniper networks, i've no experiences about that - is it a ISP? firefox will just work fine as long as your OS has established a connection to the internet...