The problem I had with upgrading Firefox to 1.5 RC was overcomed today, which I’m quite happy about. It feels noticably faster.
Part of the solution was to clean out all existing profile and remnants (everything from around 0.5 era is there). The extensions are also gone, which gave me the opportunity to run through the top rated list and install the ones I used to use, one-by-one.
And there I found this gem. “IE Tab”:https://addons.mozilla.org/extensions/moreinfo.php?id=1419&application=firefox works as advertised. (And _advertise,_ they did) Pages are rendered correctly (read: buggily, standard defying, IE style), even the old javascript-ridden intranet page I had to deal with everyday.