1153368 - Drop-down menus are drawn across multiple monitors

Status: UNCONFIRMED

(Core :: XUL, defect)

Description

[itbro]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:37.0) Gecko/20100101 Firefox/37.0
Build ID: 20150403141925

Steps to reproduce:

-Have 2+ monitors.
-On left-most monitor, open maximized Firefox window.
-Open any drop-down box menu on the right side of the Firefox window and the menu will appear across both screens, whereas I would think it should draw only to the window that Firefox is open on.


Actual results:

Drop-down menu is drawn across multiple monitors if opened on the side of a screen when there is another screen "attached" on the other side.


Expected results:

It would be nice if these drop-down menus could be drawn strictly on one monitor, using the edge of that screen as an "impassible" border when drawing drop-down menus to the screen.

Comment 1

[Liviu Cirdei]

User Agent 	Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0
Build ID 	20151210084841

Hi, 

Can you still reproduce the issue on latest Firefox versions? e.g. Firefox 43 / Nightly 46.
I tried on Firefox 43 but I can't see the issue. If you can reproduce, please provide a test case example (maybe a website where you see the issue).

Thank you.

Comment 2

[itbro]

Yes, I am still having the same issue on 43.0.4. This occurs on all websites, including blank tabs that not navigated anywhere yet. Right-clicking anywhere in the browser causes the menu to be drawn down and to the right, with the cursor being in the topmost left corner. The menu being drawn disregards the placement of the window itself, whereas I think the menu should be drawn inside the border of the Firefox window. Other browsers (such as Chrome) work this way with menus being drawn only inside of its own window.

Comment 3

[Liviu Cirdei]

Still can't reproduce.

1. I have 2 monitors.
2. On left monitor, I open a Firefox window (maximized).
3. Right click on the right side of the Firefox window.

Result: the menu appears only in this window. The menu is not drawn on the second monitor.

Maybe I missed something so please correct me if I'm doing this wrong. Also you could attach a screenshot/video with the issue.

Comment 4

[itbro]

Attachment: FirefoxMenu_DrawnOutsideWindow.png

See attached.