Remove confirmation page in Drupal Installation Profile
I've never tried it but the docs for hook_install_tasks_alter() suggest it's possible since install_finished() it one of those tasks

Alter the full list of installation tasks.
Parameters
$tasks: An array of all available installation tasks, including those provided by Drupal core. You can modify this array to change or replace any part of the Drupal installation process that occurs after the installation profile is selected.

So in theory you should be able to replace the function for that entry with one that performs a redirect instead
function MYPROFILE_install_tasks_alter(&amp;$tasks, $install_state) {
  $tasks['install_finished']['function'] = 'MYPROFILE_install_finished';
}

function MYPROFILE_install_finished(&amp;$install_state) {
  // install_finished() still needs to run but we can discard the output.
  install_finished($install_state);
  drupal_goto('&lt;front&gt;');
}