Many people have requested that a version of Portable Firefox be made for the Mac OS just like there is for Windows. While doing some searches on Google I happened to find someone that was creating some portable applications for Mac’s. Among the programs were OpenOffice 2, Firefox 22.214.171.124, Thunderbird 126.96.36.199, and more! I haven’t been able to test these applications because I don’t have access to a Mac but I have found other sites that link to them, so I would think they are reliable.
The best part is that this person is constantly updating the portable versions of the software when new releases come out.