Firefox 31 menu and tooltips appear on wrong display

[hackel]

Running Firefox 31.0+build1-0ubuntu0.14.04.1 on a dual-display system with Intel HD graphics. Both displays are running at 1366x768, the secondary positioned using xrandr to the right of the primary.

If Firefox is maximised on the primary (left) display, clicking on the menu button will always cause the menu to appear on the second monitor. It also happens when Firefox is unmaximized whenever the right edge of the window is greater than 1197 pixels. The same is true of the tooltips that appear over the firefox buttons. Interestingly, when right edge of the window is at 1197px, the tooltip will display on their monitor depending on where in the button I hovered to generate it. Also, the next button on my toolbar, which happens to be for the Request Policy extension, generates a rather wide popup. This also appears on the second display, but not until the right edge is over 1222px.

My second monitor is a television across the room, so this makes using Firefox rather difficult!

[hackel (hackel)]

I forgot to add, this also occurs with context menus. Basically, if the width of the menu won't fit between where I click and the right-edge of the first display, the entire menu appears on the second display.

Screen shot of main menu attached.

I just noticed that this bug may be a dupe of #295192, although it describes the situation with the monitors reversed. When I have Firefox on my second (right) display, everything functions normally.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[medb (medb)]

The same reproducible on Ubuntu 15.10 Alpha 2 and Firefox 39.0
Environment: MacBook Pro Retina and 2x 27" 4k displays

[Paul White (paulw2u)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. You reported this bug some time ago and there have been many changes in Ubuntu since that time. Your problem may have been fixed with some of the updates.

It would help us a lot if you could test on a currently supported Ubuntu version. When you test it and it is still an issue, kindly upload the updated logs by running only once in a terminal:

apport-collect 1361439

and add any additional information that you think relevant. Alternatively, please confirm that this is no longer a problem and that we can close the report. If we do not hear from you the bug report will close itself in approximately two months time.

Thank you again for helping make Ubuntu better.

Paul White
[Ubuntu Bug Squad]

[Launchpad Janitor (janitor)]

[Expired for firefox (Ubuntu) because there has been no activity for 60 days.]