We have a situation where developers connect to their development boxes via Citrix terminals (that are installed on their laptops), which brings them into a Gnome session (e.g. Linux), where they do all the coding.
Until now developers had Internet Access from those Citrix environments + installed Firefox browser. Starting right now the Internet Access [from that environment] is taken away.
Developers still however have the access via their IE9 browser (strictly IE9) from their laptops.
This of course makes the whole development process a lot less productive. At the same time, it is extremely difficult to come up with a solid explanation, reasons on why the productivity suffers from switching environments (on the same laptop) in order to use the Internet.
I'm turning to SO community to help us find those reasons that can convince decision makers to give Internet Access back to developers [from the system they develop on].