1251978 - Searchbar and locationbar popups are partially rendered as black if they are forced to open at the top (100% str)

Status: NEW

(Core :: Graphics, defect, P3)

Description

[arni2033]

>>>   My Info:   Win7_64, Nightly 47, 32bit, ID 20160225030209, tested with HWA on and off
STR:
1. Set DPI -> 125% :
    Set that DPI level -> 125% in your OS   [OR]
    Set layout.css.devPixelsPerPx -> 1.25
2. Enable Titlebar, enable Menu bar
3. Get screen with resolution 1366x768
 [Steps 1-3 are only required to help you reproduce this. I can reproduce it w/o them]
4. Switch Firefox to Normal mode. Resize/move the window so that
   the upper side of the window was placed below the center of the screen
5.A) (searchbar) Visit http://de.pons.com/ , add all search engines (again, I can repro w/o that)
5.B) (urlbar) Visit at least 12 different sites by typing them in urlbar (e.g. http://example.org/#12)
6. Click in (A) searchbar  (B) location bar
7. Press Alt+Down

AR:  Suggestions list opens, but it is rendered as black at the bottom. See screenshots.
ER:  Should be rendered normally.

Comment 1

[arni2033]

Attachment: screenshot 1 - searchbar popup is partially rendered as black.png

Comment 2

[arni2033]

Attachment: screenshot 2 - locationbar popup is partially rendered as black.png

Comment 3

[Milan Sreckovic [:milan] (needinfo for best results)]

Does this happen in nightly with browser.tabs.remote.autostart.2 set to false?

Comment 4

[Richard Buczynski]

Attachment: same problem

Thanks from carlkinglythdo1979.