Currently the only information displayed in the Web browser's window title for ALL windows with Defects (I suspect it's the same for all other IDs) is this: "Defects - Details".
When there are multiple windows / tabs opened to different Defect IDs it is not possible to determine the ID and title just by looking at the window's title, you have to actually switch to the window, bring it in the foreground and look at the contents.
Displaying the ID and the Title in the Web browser's window title would make the process of identifying the window with the ID that you are looking for much easier and faster.