I'm using Chrome on an ultrawide 3440x1440 monitor.
It seems that Chrome doesn't have such an option. The closest is to right click the title bar of the pop-up window and choose "Show as tab" (assuming this option is still around).
Have you tried to Ctrl+Click? That might work too.
There also seems to be an extension, One Window
, but I have no idea how well it works (last update appears to be from Mar 2015).
You can exclude things, but the methods are limited. It is more efficient to update manually.
I was afraid you'd say this. Thanks for answering my questions.