Remove comment popup on StackExchange sites ( see https://meta.stackoverflow.com/q/433155/5267751 )

stackoverflow-remove-comment-popup.js

// ==UserScript==
// @name         Auto-Click Popover Comment Button (Suppress Original Click)
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  When a comment-add button is clicked, prevent its default behavior and instead click the corresponding popover comment button.
// @author       user202729
// @match        https://*.stackoverflow.com/*
// @match        https://*.stackexchange.com/*
// @match        https://*.superuser.com/*
// @match        https://stackapps.com/*
// @match        https://*.serverfault.com/*
// @match        https://*.askubuntu.com/*
// @match        https://*.mathoverflow.net/*
// @grant        none
// ==/UserScript==

/* created by o3-mini, with some modifications */
/* tested by me and it work on qutebrowser and Firefox tampermonkey */
/* with match list copied from https://stackapps.com/questions/9443/revert-stack-exchanges-new-up-down-vote-buttons */

(function() {
    'use strict';

    // Helper function to check if an element's id starts with a specific prefix.
    function startsWith(element, prefix) {
        return element.id && element.id.indexOf(prefix) === 0;
    }

    document.addEventListener('click', function(e) {
        let target = e.target;

        // Check if the clicked element is a button
        if (target.tagName !== 'BUTTON') {
            return;
        }

        // Look for a comment-add button
        if (startsWith(target, "comment-add-button-")) {

            // Extract the random part of the id.
            const idParts = target.id.split("comment-add-button-");
            if (idParts.length < 2) return;
            const randomPart = idParts[1];

            // Find the corresponding popover comment button.
            const popoverButtonId = "popover-comment-button-" + randomPart;
            const popoverButton = document.getElementById(popoverButtonId);

            // If found, trigger the click on the popover comment button.
            if (popoverButton) {
                // Suppress the original event and its default actions.
                e.preventDefault();
                e.stopPropagation();

                popoverButton.click();
            }
        }
    }, true); // useCapture set to true to intercept the event early.

})();

apparently JavaScript already have https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith and o3 doesn't know. Well it works anyway