Open Bug 1399455 Opened 7 years ago Updated 1 year ago

First window paint draws the border on Windows 7


(Core :: Graphics, defect, P3)

Windows 7



Tracking Status
firefox-esr102 --- wontfix
firefox55 --- unaffected
firefox56 --- wontfix
firefox57 --- wontfix
firefox108 --- wontfix
firefox109 --- wontfix


(Reporter: aflorinescu, Unassigned)


(Keywords: regression, Whiteboard: [gfx-noted])

Windows 7 x64 - Version 57.0a1 20170912220343

1. Open a screen recorder.
2. Open Firefox.
3. Analyze the Firefox start-up.

[Actual Result:]
See (Firefox window border is first painted)

[Expected Result:]
The Firefox window should be painted directly without any transition, though I'm not sure what's causing the border to be drawn first for Win7. 

This scenario is particular to Win7. I haven't seen this in Linux/Win10, Win8.1 cases.
Windows 7 x64
FF 55.03 20170824053622  - not reproducible
FF 56.0b11 20170911193316 - reproducible
therefore concluding it is not a regression introduced by bug 1362103;

updating flags accordingly.
Whiteboard: [photon-performance][triage]
No longer blocks: 1362103
Component: General → Graphics
Product: Firefox → Core
Version: Trunk → 56 Branch
Severity: normal → S3

After a detailed investigation I managed to come up with these results:
Tested mozilla-central build: 2017-03-15 (verdict: g)
Tested mozilla-central build: 2017-03-16 (verdict: b)

Tests were done with and without mozregression, on Windows 7 x64.

Version: 56 Branch → Trunk
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