copy your subreddit list
// Step 1: visit
// https://www.reddit.com/subreddits/
// Step 2:
// copy & past these into Chrome developer tool
var array = []
document.querySelectorAll('.subscription-box ul li').forEach(function(element) {
var subreddit = element.querySelector('a[class="title"]')
subreddit_name = subreddit.innerText
array.push(subreddit_name)
});
copy(array)
// now you can past to whereever you want