Didn't know you were "Firefoxing" it...
Have you been trying out other browsers?
I rather like most modern browsers, though I find Firefox somewhat on the slow side. Chrome's ok in a minimalist way. (I know Eri doesn't care for it.) And Opera is, well...available. In the end, I always wind up back in IE. I've quite often used non-standard MS extensions for personal projects, or for work on an intranet (every corporate environment I've ever been in mandates IE). I don't even know if you can use client-side code in Firefox or Chrome to write to the file system, for example...with IE on Windows it's trivially easy.