Javascript canvas RGB read back

ISSUE: When reading RGB data from a canvas image the returned R,G,B values are not a true representation of the values in the image. This has been observed during development testing of drawing/reading pixel data. Return R,G,B values vary slightly by +/- 1 suggesting a rounding error.

You can test this by right here. There is a link to a Javascript based program that draws a filed rectangle and reads back the RGB values. about half the time the test fails under Brave only.


The test passes on Firefox, Chrome, Chromium, Opera.
The test fails on Brave (desktop and mobile)

Did the issue present with [default Shields settings] - Shields have no impact

Does the site function as expected when Shields are turned off? - No difference

Is there a specific Shields configuration that causes the site to break? If so, tell us that configuration. (yes/no): No

Does the site work as expected when using Chrome? Yes. according to other testers.

**Brave version (check About Brave): 1.38.109

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