Files with frf extension can be found as font files from old FontMonger program made in early 90s. Most likely no longer used.
There are 3 other file types using
the FRF file extension!
.frf - FreeReport template file
.frf - Ginga X-Ray first reduction file
.frf - Abbyy FineReader intenal page data
FRF file extension - FontMonger intermediate font
What is frf file? How to open frf files?
File type specification:
The frf file extension is associated with a font-conversion utility called FontMonger, developed by Ares Software Corporation.
The program was created in early 90s and it is likely that it is no longer available or supported.
The frf file used in FontMonger contains font data..
This frf 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.