Firefox 10 ESR is currently the only version that ever ran on Gentoo ia64. However, a single patch recently landed in Mozilla repo that fixes the issue in mozjs that was preventing Firefox 24 ESR from running on ia64. Without this patch, Firefox 24 ESR is simply unusable and instantly crashes. Please add it so that the stabilization process for ia64 can begin :-) Reproducible: Always Relevant upstream bug report is https://bugzilla.mozilla.org/show_bug.cgi?id=910845. Relevant patch for Firefox 24 ESR is https://bug910845.bugzilla.mozilla.org/attachment.cgi?id=801153.
New patchset has been rolled and updated ebuild is in tree, will be avaliable soon as mirrors sync.