Why Amazon Kindle Fire WiFi auto turn off by itself? Why Kindle Fire WiFi is disabled when the screen off? That might be the questions you will ask with your Kindle Fire. Normally, we use Wi-Fi connection when we actually using Kindle Fire like watching Amazon Prime movies or TV shows, surf Internet, watch YouTube… However, it is not user friendly when we try to download big file from Internet. The WiFi connection will cut off by itself when the screen off after idle for 5 minutes by default. You can keep WiFi on all the time by force Kindle Fire screen always on. Or the simple and economy way ~ use Wi-Fi Keep Alive App.