Two cool firefox add-ons, but bad news is they are only for windows firefox users. Good news is you can get VMWareFusion on your Mac and install windows and then take advantage of these tools.
IE Tab let’s you switch from mozilla rendering engine to the IE rendering engine and thus see how the page would look in IE. I suppose this is only marginally helpful b/c then you’d probably see that your page is broken, and you’d want to manipulate the CSS in IE Developer Toolbar or something. Although, if you’re awesome maybe you already know what’s wrong with your page in IE and you can just go modify your css in the source code. But, I digress.
