[bgarbiak]

Trivia: at some point (around IE8, I believe) Google released a plug-in to Internet Explorer called IEFrame that displayed supported pages inside IE window, but using Chrome underneath. It was fairy popular.

[joshuaissac]

> Google released a plug-in to Internet Explorer called IEFrame

It was called ChromeFrame.

There was also an ActiveX plug-in that allowed hosting XULRunner in IE, which allowed embedding Firefox inside it.