Extract (unzip) the downloaded file. Look for a file named autorun.upg or similar upgrade file.
But then, you connect to the internet.
The Ultimate Guide to Philips TV Firmware: Updates, Troubleshooting, and Performance Optimization philips tv firmware
If your home Wi-Fi frequently drops out, turn off automatic background updates. A corrupted background download can trigger installation errors. Instead, run manual checks once every few months. Extract (unzip) the downloaded file
Compare the available firmware version with the version on your TV. If the web version is newer, download the .zip file. download the .zip file.