VPN turns off on Firefox for Android after restarting phone

I have VPN set to On on Firefox 155.0 on a phone with Android 14. This is the VPN now built into Firefox mobile, not the Mozilla VPN subscription. When I restart the phone VPN turns off. Is there a way to keep VPN on so I do not have to turn it back on each time I restart the phone? Also, VPN sometimes turns off, but not always, when I quit and reopen Firefox. I use Firefox in private browsing mode with the setting on to delete Delete browsing data on quit.