One-liner to find & click all post "Edit" links in the WordPress admin area.

wordpress-open-edit-post-tabs.js

/**
 * Note: Most browsers will have pop-up blockers on - you'll need to allow your domain
 * through the pop-up blocker in order for this to work. Also, I'd suggest limiting your 
 * post view to 20 max, or whatever you're comfortable with. However many posts are in the
 * list view, is how many tabs will open!
 */

// jQuery version:
jQuery(".iedit .edit a").each((i, el) => { window.open(jQuery(el).attr("href"), "_blank"); });

// Vanilla JS:
document.querySelectorAll(".iedit .edit a").forEach((el) => { window.open(el.getAttribute("href"), "_blank"); });