Bug 689623's fix is re-enabled in FF24, which is currently in Aurora. It goes a long way towards fixing the problems with image-heavy pages. And bug 847223 sh

Bug 689623's fix is re-enabled in FF24, which is currently in Aurora. It goes a long way towards fixing the problems with image-heavy pages. And bug 847223 should fix them completely once it's done; there are numerous patches but some haven't passed code review, so it's unclear how much longer it'll take.