// ==UserScript==
// @name        Reddit Auto-Open First Post
// @namespace   RedditAutoOpenFirstPost
// @description Auto open first post in Reddit front page using Reddit API URL: https://api.reddit.com/?goToFirstPost
// @include     https://api.reddit.com/*
// @version     1
// @grant       none
// ==/UserScript==
if (location.pathname === "/") {
if (location.search.toLowerCase() === "?gotofirstpost") {
var obj = JSON.parse(document.body.children[0].innerHTML);
var entries = obj.data.children;
if (entries.length) {
location.href = "https://www.reddit.com" + entries[0].data.permalink;
} else {
alert("No posted entry found in Reddit front page data.");
}
}
}