InoReader - Fix Open Article in Background Tab

Fixes InoReader's keyboard shortcut to open articles in background tabs in Firefox

// ==UserScript==
// @name        InoReader - Fix Open Article in Background Tab
// @description Fixes InoReader's keyboard shortcut to open articles in background tabs in Firefox
// @description Forked from https://greasyfork.org/en/scripts/11519-inoreader-fix-open-article-in-background-tab
// @match       https://*.inoreader.com/*
// @version     1.3
// @grant       GM_openInTab
// @namespace   inoreader
// ==/UserScript==
var element = document.createElement('div');
element.id = 'inoreader_companion_div';
document.body.appendChild(element);
window.addEventListener('message', receiveMessage);
function receiveMessage(event) {
  //console.log("receiveMessage event: ");
  //console.log(event);
  var originRegex = /^https:\/\/[a-zA-Z0-9-]+\.inoreader\.com$/;
  if (originRegex.test(event.origin)) {
    if (event.data.request && event.data.request.url) {
      //console.log(event.data.request.url);
      GM_openInTab(event.data.request.url, true);
    }
  }
}