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However, provided users have not changed their default selection (in IE11 at least!), you can approximate the behaviour you want through appropriate invocation of the window.open() method. Per others' answers/comments here, generally speaking, we as web programmers have little control over how popups are opened. Some context around the IE behaviour with this default setting can be found here: In IE11 at least, the default user setting is to 'Let Internet Explorer decide how popups should open' (Off-hand, I'm not sure what the default was in previous versions).
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