Now you can scroll in apps like Gmail, Chrome, WhatsApp, etc.
Now it is easy to look at your notifications and go back quickly.
Only some functionality requires root. Root is needed to control extra functionality.
If the sensor does not pick up your fingerprint correctly multiple times, then it stops working. Another app may also access the sensor at a higher priority level. Lock and unlock your device to resolve this.
It is not an error. This notification is needed to keep the app alive. Closing the notification will seize functionality.
No, it should not mess up your device. If you switch off the button, then it stops.
No, it hardly takes resources. Find its usage under Settings > Battery. Cannot find it? Then it is less than one percent.
Fingerprint Gestures uses an Accessibility Service to run some functionality. This permission is needed. We only use it for the actions you define on the gestures.
Screen overlays can prevent you from clicking on a button. Disable the third party non-system application temporarily. Example: Twilight