Notes about the FIR file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The FIR file type is primarily associated with 'Canon Digital Camera' by Canon Inc.. This is an encrypted firmware file used to update the software that controls camera functions.