Leaderboards are a bit messed at the moment because the latest update changed how the values are stored on the server. But I have not changed the server to accommodate the code change yet because many people have not refreshed to get the update yet. Either way, the leaderboards will be screwed up for a few days.
For some reason the Firefox 47.0 update changed a setting. You need to go Ad-Ons in Firefox, find the Unity Web Player & make sure it is set to Always Activated. This should fix the issue.
So sorry for the issue but this is tricky. The only way now is to either use Firefox, or try using Web Player, http://bit.ly/20ZVTl4. This means you will lose your progress though so if you want to keep that, you have to wait for cloud saves. Sorry to put you through the trouble and wait.
 "Idle Zoo"){kind=icon}
 "Animation Throwdown"){kind=icon}
 "Idle Hero Tower Defense"){kind=icon}
 "Zombidle"){kind=icon}
 "Castle Clicker : Builder Tycoon"){kind=icon}
 "Kongpanion Park"){kind=icon}
 "Time Clickers"){kind=icon}
 "Enchanted Heroes"){kind=icon}
 "GemCraft - Chasing Shadows"){kind=icon}
 "Tap Cats - Idle Warfare"){kind=icon}
 "Holyday City"){kind=icon}
 "AdVenture Capitalist"){kind=icon}
 "Tap Adventure"){kind=icon}
 "SAS: Zombie Assault 4"){kind=icon}
Leaderboards are a bit messed at the moment because the latest update changed how the values are stored on the server. But I have not changed the server to accommodate the code change yet because many people have not refreshed to get the update yet. Either way, the leaderboards will be screwed up for a few days.