https://bugs.documentfoundation.org/show_bug.cgi?id=170087

--- Comment #4 from Hossein <[email protected]> ---
(In reply to V Stuart Foote from comment #3)
> Confirmed, *very* brief flash before full draw in dark mode fo both
> skia/Vulkan and skia/Raster framing. But at this level of hw it is hard to
> consider it an annoyance.
Maybe not everyone is affected by white flashes, but it is considered harmful
for some people. Please see:

"Avoid flashing web content
Overview
Content that flashes repeatedly can be harmful to people with photo-sensitivity
or seizure disorders like epilepsy. Flashing content can lead to reactions like
vomiting and nausea, and trigger seizures if the flashes are severe enough."
https://marcom.wwu.edu/accessibility/guide/avoid-flashing-web-content

Also:

"Three Flashes or Below Threshold (Level A)
Individuals who have photosensitive seizure disorders can have a seizure
triggered by content that flashes at certain frequencies for more than a few
flashes. People are even more sensitive to red flashing than to other colors,
so a special test is provided for saturated red flashing. These guidelines were
originally based on guidelines for the broadcasting industry as adapted for
desktop monitors, where content is viewed from a closer distance (using a
larger angle of vision)."
https://www.w3.org/WAI/WCAG22/Understanding/three-flashes-or-below-threshold.html

There is also some pink flashes in Windows, in which I will file in another bug
report.

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