What are the steps to perform a Nikon D90 firmware update in 2017?

To perform a firmware update on a Nikon D90 in 2017, follow these steps:

1. Visit the Nikon website and search for the D90 firmware update.
2. Download the latest firmware update file to your computer.
3. Insert a formatted memory card into your camera.
4. Copy the firmware update file to the root directory of the memory card.
5. Insert the memory card into your camera and turn it on.
6. Navigate to the firmware update option in the camera menu.
7. Follow the on-screen instructions to complete the firmware update process.
8. Once the update is complete, turn off the camera and restart it to ensure the update was successful.