Mozilla ran a zillion dollar campaign spreading the (false) rumor that Firefox was safer, faster and all sorts of possitive words, than IE - allthough it never was or is.
As far as one can objectively measure it, IE's rendering engine is the slowest of the current engines available overall, that is no "propaganda" (it is also the most bug-ridden in HTML/CSS/JS by a large margin). Neither is IE's horrendous security record some sort of collective fanboy fantasy, irrespective of whatever reasons can be ascribed (or that savvy users can tweak it to fill its copious holes). As someone who has no affiliation to either, I would put money on saying Firefox *is* safer and faster than IE. This thread is about resource usage however, and in that neither of them are particularly svelte...
