DashClock Viber extension works WITHOUT root permission!
It enables display of the number of unread message from Viber in Lock Screen.
IMPORTANT: You *MUST* enable notification access for this extension to work.
If you have enabled notification but it still doesn't work, try to reboot your phone once.
Known Limitation: Group message may counted at one message in some situation.
Please note that this is a DashClock extension, you need to install DashClock to use it: