從主控台可看到當按下按鈕後會出現

Not allowed to load local resource: read://https//www.ithome.com.tw/news/158019

看起來是瀏覽器限制不允許開啟...
那可試著換個方向，將跳轉方式改成顯示新網址在旁邊，由自己右鍵另開該頁面來略過這限制

像這樣...

// ==UserScript==
// @name         Open Read Mode
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Click [ADD] button to navigate to the URL with "read://" prefix
// @author       You
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // Create the [ADD] button element
    const addButton = document.createElement('button');
    addButton.innerText = 'ADD';
    addButton.style.position = 'fixed';
    addButton.style.top = '10px';
    addButton.style.left = '10px';
    addButton.style.padding = '5px 10px';
    addButton.style.border = '2px solid black';
    addButton.style.backgroundColor = 'black';
    addButton.style.color = 'white';
    addButton.style.zIndex = '9999';

    // Append the [ADD] button to the body
    document.body.appendChild(addButton);

    // Function to add a hyperlink next to the [ADD] button
    function addHyperlink(url) {
        const hyperlink = document.createElement('a');
        hyperlink.href = url;
        hyperlink.textContent = url;
        hyperlink.style.display = 'block';
        hyperlink.style.position = 'fixed';
        hyperlink.style.top = '10px';
        hyperlink.style.left = '80px';
        hyperlink.style.padding = '5px';
        hyperlink.style.border = '1px solid black';
        hyperlink.style.backgroundColor = 'white';
        hyperlink.style.zIndex = '9999';
        document.body.appendChild(hyperlink);
    }

    // Add event listener for the [ADD] button click
    addButton.addEventListener('click', function() {
        // Get the current URL
        const currentURL = window.location.href;

        // Check if the URL already starts with 'read://'
        if (!currentURL.startsWith('read://')) {
            // Add the 'read://' prefix to the URL
            const newURL = 'read://' + currentURL;
            window.open(newURL);
            // Create a hyperlink for manual access
            addHyperlink(newURL);
        }
    });
})();

我猜是因為安全性考量，不給連
類似這種
https://superuser.com/questions/1697167/edge-settings-shortcut-url-not-working-in-custom-html-code

以這個為例 https://code.visualstudio.com/docs
會出現下面錯誤
Not allowed to load local resource: read://https//code.visualstudio.com/docs

一般是轉換相對路徑或是 http://localhost 之類的
但 read:// 還沒找到要怎麼處理

可以用快捷鍵 F9，不過我發現要等一下
似乎也不是每個網址都會出現

== 補充
也許可以結合這篇 [javascript] 複製內容至剪貼簿
將轉換後的網址放到剪貼簿，再自己手動貼上

// 前略
    addButton.addEventListener('click', function() {
        // Get the current URL
        const currentURL = window.location.href;

        // Check if the URL already starts with 'read://'
        if (!currentURL.startsWith('read://')) {
            // Add the 'read://' prefix to the URL
            const newURL = 'read://' + currentURL;

            // Copy Url to Clipboard
            let dummy = document.createElement('input'),
            document.body.appendChild(dummy);
            dummy.value = newURL;
            dummy.select();
            document.execCommand('copy');
            document.body.removeChild(dummy);
        }
    });