FBReader

Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.

Allows the app to read the contents of your USB storage.

Allows the app to write to the USB storage.

MANAGE_EXTERNAL_STORAGE

Allows the app to view information about network connections such as which networks exist and are connected.

FOREGROUND_SERVICE

POST_NOTIFICATIONS

FOREGROUND_SERVICE_DATA_SYNC

Allows the app to prevent the device from going to sleep.

Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the device and allow the app to slow down the overall device by always running.

Allows the app to modify the system's settings data. Malicious apps may corrupt your system's configuration.