Opening Fb File
Fb! extension stands for Flashget unfinished downloading file. You can run these files with Flashget software.
While Flashget software downloads files, it changes the extension of file for avoiding confusion.
For example, File extension may be like this:
Because these files are unfinished, can not work by themself. If you need to use these, you should change the extension by clicking change the file name option. Then you should delete .fb! part of the extension.
You may watch avi or mp3 files unfinished.
Opening methods of Fb file
Flashget or free alternatives
Links to opening Fb file