google-chromemacostabsweb-browser
Happens periodically with chrome, not sure about other browsers.
If I have a window with multiple tabs and drag one of them either to create a new window or place it in another, usually to my other monitor, the original window gets moved as well, typically about half of the distance.
This just started happening out of now where, the only thing that has changed on my computer recently was I reinstalled chrome after having flash issues with video.
I am not sure it will working?
Try to check the chekbox in screenshot below
I have figured out a fix to this using Firefox 58.0.2. Firefox 59 slightly breaks this functionality - it opens as a new window in a new macOS space instead of a floating popup.
I don't have fixes for Chrome and Safari or Firefox 59, but I am certain they are possible.
(If you require Firefox 58.0.2, you can find it on Mozilla's FTP here. You will likely want to disable Firefox auto-updates, but this will compromise your security in the long run.)
In the address bar, type in about:config and hit enter.
On the warning page, click "I accept the risk". As long as you don't mess with other settings, your browser should remain safe.
In the search field, type link. - this will help us narrow down to the two settings we want to change.
Double click on browser.link.open_newwindow.disabled_in_fullscreen to set the boolean to false.
Double click on browser.link.open_newwindow.restriction and set 1 as the value and click OK.
This should force Firefox to open popups like the one you have as a new window that floats on top of the fullscreen window. Again, if you use Firefox 59, the popup will make a new window, but it will go to a new space instead of floating.
Best Answer
Since this is not a OS X error, and is instead a browser error, you should submit it like this: https://support.google.com/chrome/answer/95315?hl=en
Hope this helps!
(Note that this bug is nonexistent on Safari, latest beta)