Originally Posted by isaac
Taking a wild guess, that sounds like a user browser setting, rather than a website setting.

Ctrl+Left Click - Open a link in a background tab.
Shift+Left Click - Open a link in a new browser window.

https://www.howtogeek.com/114518/47-keyboard-shortcuts-that-work-in-all-web-browsers/

I'm not sure how you'd do that for "previous pages" unless you were viewing your browsing history.

Can you explain what you mean by, "open previous pages in separate tabs."

This also doesn't work in a multi-page thread on this site.

What I am trying to do is to look at page one of a thread in one tab and then also look at page two of that same thread in another tab.