AnimationKiller

GIF Animation Signature:

    0x21 0xFF 0x0B NETSCAPE 2.0 0x03 0x01 B1 B2 0x00

           0x21 - Extension Introducer
           0xFF - Application Extension
           0x0B - Block Size
       NETSCAPE - Application Identifier
            2.0 - Application Authentication Code
           0x03 - Data Block Size
           0x01 - Fixed value 0x01
             B1 - First Byte of Repeat Count
             B2 - Second Byte of Repeat Count
           0x00 - Block Terminator