It doesn't seem to work, I tried it using reddit.com as the domain. It worked on the first load of the page and then stopped doing anything. It's a shame because it's a really good idea, I'd love to give 5 starts once it's fixed.
Every time you open a new tab, it delays the page load. You can set it to be restrictive that even if you click a link and open a new tab, it delay the page load(set false by default). Let me know if you are still having issues
