The good news is, you can turn those annoying sounds off and have Facebook behave the way it should; being nice and quiet when you’re trying to browse discretely. The process is simple:
Obviously, you follow the same process if you want to enable the sounds (if for some reason you want them back). You can, if you wish, chance the notification sound as well. Instead of opening App Settings (in step 2), scroll a little further to ‘Notification ringtone’, and select a more pleasing tone, and bingo, you’re done!
Have you tried the new Facebook update, and do the sounds annoy you as much as they do us?