I want to use an older version of FF portable (older than 48). There used to be a list of older versions (years ago), where one could use any from that list. I can't find any trace now though. Are they still available? Been a while since I used the forums - never needed to - 'til today.
https://sourceforge.net/projects/portableapps/files/Mozilla%20Firefox%2C...
Older than 2007 versions are under a different path which I don't have at hands currently.
https://sourceforge.net/projects/portableapps/ Click the link under the download button. Each app listed on the page has older versions in a directory listed by version and date.