UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36

Steps to reproduce the problem:
1. Open a browser window and maximize to fit screen
2. Open a few tabs in the browser
3. Drag one of the tabs to the middle of the screen or a screen edge.

What is the expected behavior?
Tab detaches from the main browser window into a separate window (this works), new window remains in middle of screen (this does not).

What went wrong?
New window automatically snaps to the entire screen.

New window ignores default Windows behaviour for window dragging and snapping, even though Windows still gives correct visual cues.

A tab window should snap to half the screen if dragged to left or right edge of a screen and should unsnap entirely when dragged to the middle of a screen.

I found no way to get the new window to take on any other size without resorting to first minizing the window or using keyboard shortcuts for window snapping.

Did this work before? Yes unknown

Chrome version: 57.0.2987.133  Channel: stable
OS Version: 10.0
Flash Version: 

Previous version of Chrome did not have this issue. Since it overwrites default (expected) behaviour in the Windows OS, I classify this as a bug.