The second one is the basic mode, which shows fewer photos and loads faster. The first one is the Regular/standard mode which loads slower and shows more photos. Well, officially, Facebook provides 2 versions of it. Because you just need a browser for this. You can do this on a PC, Android, or iOS too. Read Also: How To Download All Facebook Information How To Open Old Facebook Version On Mobile And PC Your internet connection is slow and the FB page isn’t loading properly.You have limited internet data and want to save your data.You’re an old FB user and you love old mobile FB.Different people have different requirements.