The problem is that FF does not read the OS list of programs (or can call the "Use OS selection for program/Open With"), but has "its own source" - on Linux, this sucks, because if I want to specify an unknown program, it's most likely in /usr/bin, which has thousands of files and so blocks the disk for a huge time while reading the file list.
On Windows, it sucks too, because I have to go to c:\, then remember if the program is x64 or x86, then remember the producer of the program, hope the program files-directory is named after the producer or the software, and then find the correct .exe to open. SUUUUCKS.
On Windows, it sucks too, because I have to go to c:\, then remember if the program is x64 or x86, then remember the producer of the program, hope the program files-directory is named after the producer or the software, and then find the correct .exe to open. SUUUUCKS.