For these two lines: https://dxr.mozilla.org/mozilla-central/source/image/OrientedImage.cpp?from=OrientedImage.cpp&case=true#310 https://dxr.mozilla.org/mozilla-central/source/image/OrientedImage.cpp?from=OrientedImage.cpp&case=true#316 Coverity considers that this is incorrect: swapped_arguments: The positions of arguments in the constructor for mozilla::gfx::IntSizeTyped<mozilla::gfx::UnknownUnits> do not match the ordering of the parameters: innerImageSize.height is passed to aWidth innerImageSize.width is passed to aHeight I guess this is a not a big deal because we are probably doing a multiplication of the two arguments. However, if the code evolves, this might cause some issues.

This is not a bug. The comment on line 310 explains that we are intentionally swapping the sizes here.