linux gtk+
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It is _immensely_ annoying that you can't just download and install Firefox 3 on Linux (at least the Xandros distro that comes with the Eee PC) without having to install something called Gtk+ 2.10. Not least because you can't just `apt-get install` the latter: you _have_ to build it from source, and handle countless dependencies. Really, I thought we were supposed to have got past all that shit.
This page details the steps.