(In reply to Robert Mader [:rmader] from comment #2) > I assume this is on Gnome 3.38. In that case, no red overlay implies fullscreen unredirection, e.g. the compositor directly flips the buffer without compositing, which is great for performance. That still seems to be the case when playing a fullscreen [video](https://bug1619882.bmoattachments.org/attachment.cgi?id=9149605) with Firefox' default video player UI. I can even hover or move the progress bar and nothing becomes red as long Firefox is fullscreen. (Darkspirit from comment #1) > This bug doesn't seem to occur on Gnome X11. The video has a transparent purple rectangle on top of it. (damage region painting: bug 1640858 comment 12) MOZ_ENABLE_WAYLAND=1 looks like X11. The video itself it red all the time.
Bug 1677892 Comment 5 Edit History
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(In reply to Robert Mader [:rmader] from comment #2) > I assume this is on Gnome 3.38. In that case, no red overlay implies fullscreen unredirection, e.g. the compositor directly flips the buffer without compositing, which is great for performance. That still seems to be the case when playing a fullscreen [video](https://bug1619882.bmoattachments.org/attachment.cgi?id=9149605) with Firefox' default video player UI. I can even hover or move the progress bar and nothing becomes red as long Firefox is fullscreen. (Darkspirit from comment #1) > This bug doesn't seem to occur on Gnome X11. The video has a transparent purple rectangle on top of it. (damage region painting: bug 1640858 comment 12) MOZ_ENABLE_WAYLAND=1 looks like X11. The video itself is red all the time.