Undercover browser

Recently, I told a group to not use Internet Explorer until the update came out to make it more secure. Unfortunately, many sites, especially government ones only allow using Internet Explorer. Why this is, I have no idea. However, an add on to your browser may solve this issue. Add an agent switcher to fool the website you are on to think it's IE or something else, like an iPhone. These switcher agents are great  for testing or getting through something oddly blocked websites. Here is a link for the Chrome add on and Firefox extension