2 - I don’t believe it’s possible. I suspect they have it default back to ‘Hidden’ so folks don’t make mistakes.
3 - What do you mean by scrape? From what you have listed ‘horriblesubs’ is an RSS feed. You mostly likely already know, but incase you don’t. Your system running Sonarr needs to always be up and have Sonarr running to grab the shows you have selected…
My browser is purged after every use. I suppose I’ll write a user script for my purposes. May I ask whether there are any plans to include a more permanent persistence?