Follow the instructions on the Google Support site for updating Chrome on Windows & macOS:
Follow the instructions on the Google Support site for updating Chrome on Android:
Follow the instructions on the Google Support site for updating Chrome on iPhone & iPad:
Follow the instructions on the Mozilla Firefox support site for updating Firefox on Windows:
Follow the instructions on the Mozilla Firefox support site for updating Firefox on macOS:
Follow the instructions on the Mozilla Firefox support site for updating Firefox on Android:
Follow the instructions on the Mozilla Firefox support site for updating Firefox on iPhone/iPad: