The
~/Library/Caches/Firefox/Profiles/ folder Grelber and I have been discussing is
not the Profiles folder [
~/Library/Application Support/Firefox/Profiles/] referred to in the linked article. Indeed, the
list of folders contained in that Profiles folder notes the inclusion of a Cache folder in Firefox versions as follows:
Linux - all versions.
Mac OS/Windows - previous to 1.5
But Grelber and I are discussing Firefox 34.