Files with ffr file extension can be encountered as old FFR compressed archives. Probably no way how to decompress them now.
FFR file extension - FFR compressed archive
What is ffr file? How to open ffr files?
File type specification:
The ffr file extension is mostly related to FFR compressed archive format.
Seems like some very old format, with no supports nowadays and such, there is no way how to extract these .ffr archives.
This ffr file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.