1982441 - Dragging a tab off the tab-bar doesn't do anything if you drop it on the print-preview content area

Status: NEW

(Firefox :: Tabbed Browser, defect, P3)

Description

[Daniel Holbert [:dholbert]]

STR:

1. In a window with several tabs open, visit http://example.org in one of the tabs.
2. Ctrl+P or Cmd+P to bring up Print Preview
3. Click the tab and drag it down over the print-preview content area (the paper or its gray surroundings)

ACTUAL RESULTS:
Nothing happens; the tab remains part of the same window.

EXPECTED RESULTS:
The tab should tear off to spawn a new window (which is what happens if you drop the tab anywhere else, e.g. over the print-preview menu options or outside the print-preview dialog entirely).

Comment 1

[Daniel Holbert [:dholbert]]

Attachment: screencast of bug (dragging and dropping tab over print-preview content area [doesn't detach] and then finally over the print options [successfully detaches]

Comment 2

[Daniel Holbert [:dholbert]]

As shown in the screencast, the STR here sometimes also starts to trigger the colorful "make a new tab group" UI, too, as if I were dragging the tab on top of another tab (even though I'm not actually doing that).

Comment 3

[Mark Striemer [:mstriemer]]

It seems like the UI issue of the tab not moving around and showing the incorrect state (like it will stack them) is unrelated to the print preview being open for me

I was able to reproduce the issue of the tab not tearing out when dropped on top of the print preview.

This seems like it might be an issue with the tabbed browser code that handles the drop event, I'm not too sure about how that happens so I'm going to move this over there. If we're preventing it from working in the printing code happy to take it back though