This shouldn't be the default ever. I the user, have the control of I want a new window/tab or use the current one. Sites opening links in new windows/tabs try tomorrow me on their site, for their reasons, not mine. When building a web application: Make sure to not play with links in a way that Ctrl+click, context menu or, on mobile, long touch don't work, but allow me to open new tabs, and keep the state if I go away and then use the back button to come back. Even for non-powerusers this is a good habit. Non-powerusers are often surprised bu new windows popping up.