Older Internet Explorer and Firefox versions displayed the source that was downloaded, not the one generated/modified by scripts. It makes so much more sense, especially since there was always an option to view the generated source (by using JavaScript for an example) but I don't see how you can access the downloaded source at all if View Source is replaced by View Generated Source. Hm, actually one could use FireBug and watch Net response I suppose, but that's inconvenient.