> So why don't they have two browsers
I definitely do not claim they were right, but one of my previous employer's (not a software company) IT department insisted that additional applications in employee's computers were an extra workload for them to maintain. (Occasionally also security was used as an excuse). So the text editor that was allowed was notepad and the browser was IE.
So why don't they have two browsers - one for internal use only (IE6), which is firewalled to only internal network shares and another browser (Chrome, whatever) which can only go to the real internet?
At least that way you'll be browsing the wild internet safely.