Auto subscribe to a lot of subreddits after you move to a new account.

autosub_reddit.js

/*
-Visit https://old.reddit.com/subreddits/ using your old account
-Copy link address of "multireddit of your subscriptions"
 It will give you a link address like this: https://old.reddit.com/r/[subreddit1+subreddit2...+subredditN]
 Please note that if you have a lot of subreddits the link won't work because there's a limit to the link's length, you can simply split it to two or three links
-Visit that link (or links) using your new account.
-Open the console by pressing F12 and then clicking the console tab
-Past the code bellow and press enter. You're welcome :)
*/
const sub = () => {
	let btn = document.querySelector(".add.active");
	if(btn) {
		btn.click();
		setTimeout('sub()', 500);
	} else {
		alert("You have subscribed to all the subreddits successfully");
		return;
	}
}
setTimeout('sub()', 500);