Multiple-URL-selection-and-opening-userscript

Use Ctrl + Left mouse click to select multiple urls, they will be highlighted with red outline and opened when you release mouse.

Userscript showcase at codepen: https://codepen.io/XCanG/pen/EEyWMW

This userscript not work in Chrome because Chrome not allow to opening 2 or more tabs in one action, for that use chrome addons with API:

chrome.tabs.create({
    url: urls[i]
});

You need addon in your browser such as Tapermonkey to use it.