Original sentence: In May 2015 Facebook added support for GIF.The Graphics Interchange Format, better known by its acronym GIF (  or  ), is a bitmap image format animation that was developed by a team at the bulletin board service (BBS) provider CompuServe led by American computer scientist Steve Wilhite on June 15, 1987
Edited sentence: In May 2015 Facebook added GIF support, as they originally did not support GIF on their site.The Graphics Interchange Format, better known by its acronym GIF ( ), is a bitmap image format animation that was developed by a team at the bulletin board service (BBS) provider CompuServe led by American computer scientist Steve Wilhite on June 15, 1987