(Never used mozregression before so let me know if you need more details from the log.) Mozregression's last logs: Narrowed inbound regression window from (3 builds) to (2 builds) (~1 steps left)įound commit message: Bug 1503022 - Refactor window and toolbar color handling and make the Dark and Light themes honor the Windows 10 accent color setting. The final autoland bissection was e0555201 - 4ec5f59a of which builds, only b9a0d600 was good. I have provided screenshots (attached) and also a YouTube video which may illustrate the behaviour more clearly: įirefox 65 should behave identically to Firefox 64, with no DWM artifacts.Ĭompleted mozregression tests, the last good build was b9a0d600 in autoland. I am considering rolling back to Firefox 64 for the timebeing but will stay on 65 on at least one affected device so I can provide resources to support this report. This issue is seriously affecting my ability to use Firefox day-to-day, because of the visual artifacting and the broken window functionality. When you interact with the window, the tab strip returns to its proper colour.Īs noted above, I have reproduced all these issues on two devices which upgraded from Firefox 64 to 65 automatically although I do use registry hacks which I consider could have the potential to interfere with windows, removing them has not remedied the issue and Firefox is the only affected application. This appears to occur across all included themes. Occasionally, and it appears usually when switching back to an inactive Firefox window, the window enters a state where the tab strip background becomes solid white, and only favicons remain visible. It's also of note that Firefox Windows do not show up as automatic snap suggestions after snapping one window also illustrated in the video. I say "always," because as indicated in the video below, sometimes it works, and sometimes it doesn't – only Firefox is affected. For example, it is not always possible to snap any Firefox window to the sides of the screen, by dragging it to a side of the screen, or using the Win+ArrowLeft/Win+ArrowRight screenshots. When selecting a Firefox window after it has been inactive, you can momentarily observe the entire basic DWM default titlebar flash at the top of the Firefox window.įirefox windows no longer work with Windows 10 DWM functions. It is visible on the top corners that this border is actually a DWM (Desktop Window Manager) artifact from a basic-styled Windows window you can see in the top-left, despite the clipping, that the Firefox icon is visible, and in the top-right, the default close button is visible. Reproduced on Windows 10 17134 (1803) and also 17763 (1809)Īfter updating to Firefox 65.0, all Firefox windows are surrounded by a permanent white border on the top, left and right sides.Reproduced on 3440x1440 (one monitor in a triple-monitor setup) with GTX 1080 Ti also Surface Pro with Intel Graphics intend to test on further hardware once I get a chance. ![]() ![]() I do use the Windows freeware utility Sizer which assists in resizing/positioning windows (and its current size tooltips are visible in the attached video) again, removing it has had no effect on Firefox. ![]() I am using a custom (black) titlebar colour in Windows 10 (registry edit) I wondered if this may be connected, but reversing this change has had no effect on Firefox. ![]()
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