Nice for entertaiment

I browsed on a legitimate channel, suddenly a popup forced me to download an app to have a chance to win $100. I could not use Mercury anymore and had to delete it

My rear camera is bad so I use front camera. Previous Presence version allowed me to switch camera but the new version has rear camera as default. And it requires to access rear first before it allows me to switch so it render my device useless. It keeps saying my camera is offline. Who is the smarta.. to change it.