Greasmonkey script to ask you if you really want to access some distracting web resource

Digital_conscience.js

// ==UserScript==
// @name     Timeout blocker v2
// @require  http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// @grant    GM_addStyle
// @grant    GM_setValue
// @grant    GM_getValue
// @match    https://www.facebook.com/*

// ==/UserScript==
//--- The @grant directive is used to restore the proper sandbox.

let storageKey = window.location.origin +'LoadTime';

let interval = 600000;
let pastThreshold = Number(new Date()) - interval;


function displayOverlay() {
    let unlockPhrase = 'I do want to open this resource';
    let questionInput = $('<input>', {id: 'question_input'});

    let overlay = $('<div>', {class: 'overlay'}).append($('<div>', {class: 'question_block'}).append(
        $('<label>', {for: 'question_input', text: `Are you really sure you want to do this? If yes - please type the unlock phrase in.`}),
        questionInput));
    $('body').append(overlay);

    overlay.keypress((event) => {
        if (event.which == 13 && questionInput.val() === unlockPhrase) {
            overlay.hide();
        }
    });
}

let lastLoaded = GM_getValue(storageKey, pastThreshold);

if (lastLoaded <= Number(new Date()) - interval) {
    displayOverlay();
    GM_setValue(storageKey, Number(new Date()));
}





GM_addStyle(`
.overlay {
    position: fixed; /* Sit on top of the page content */
    display: block; /* Hidden by default */
    width: 100%; /* Full width (cover the whole page) */
    height: 100%; /* Full height (cover the whole page) */
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.99); /* Black background with opacity */
    z-index: 2; /* Specify a stack order in case you're using a different order for other elements */
    cursor: pointer; /* Add a pointer on hover */
}

.question_block {
    width: 80em;
    height: 3em;
    position: fixed;
    top: 50%;
    left: 40%;
    display: block;
}

#question_input {
    margin-left: 20px;
    width: 25em;
    height: 2em;
}

`);