1306633 - Right click menu opens in the wrong place on Mac with multiple monitors while in full screen mode or in a window with a width exceeding a certain amount

Status: RESOLVED WORKSFORME

(Core :: Widget: Cocoa, defect)

Description

[ktruong008]

Attachment: actual.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:51.0) Gecko/20100101 Firefox/51.0
Build ID: 20160930004005

Steps to reproduce:

1) Have multiple monitors active (2 external, 1 Macbook for my setup)
2) Full screen the Firefox window on my Macbook
3) Right click anywhere on the screen in the Firefox window


Actual results:

The right click menu opens up in different places.
If I right-click near the top left, the menu will open closer the middle.
If I right-click in the middle, the menu will open up to the far right.

After the Firefox browser reaches a certain width, any right click will open up a menu that's completely out of position (sometimes popping up in a different browser), and no where near the cursor's position at the time of right clicking.

See picture attached. I right click near the middle of the screen, but the menu pops up near the bottom right.

This happens when I'm using multiple monitors.


Expected results:

When right-clicking in the browser, the option menu should appear to the right and under the cursor.

Seems to be another manifestation of:
 https://bugzilla.mozilla.org/show_bug.cgi?id=245418

I noticed this bug during v51.0a2 of Firefox Developer Edition.
I currently use OS X El Capitan Version 10.11.3, MacBook Pro Retina 15-inch

Comment 1

[Tracy Walker [:tracy]]

I cannot reproduce this on latest Nightly 52.0a1, 20161004030204, with a single external monitor connected (I don't have the ability to connect two).

Reporter, does it reproduce for you on Nightly?

Comment 2

[ktruong008]

Thanks for taking a look.

I just tried it on the latest Nightly and the bug is NOT present on there.

I made a Jing screencast to show the bug happening in normal Firefox Developers vs. Nightly:

http://screencast.com/t/qqqE2tzp1kWU

Right now, my arrangement of monitors is: 

~23" ViewSonic monitor | 15" MacBook | ~23" Asus monitor

Comment 3

[ktruong008]

And the bug only happens in Firefox windows present on the MacBook Pro in the middle when the window is full screen or with a width close to full screen, if that helps.

Comment 4

[ktruong008]

Not sure what happened, but it's fixed :)