Changes

==== Painting/Rasterizing (Layers aka Non-WebRender) ====

Painting/rendering/rasterizing is the step where graphical primitives (such as a command to fill an [https://developer.mozilla.org/en-US/docs/Web/SVG SVG] circle, or a [https://developer.mozilla.org/en-US/docs/Web/Guide/Graphics/Drawing_graphics_with_canvas canvas] command to stroke a path between x, y, z, or the internally produced command to draw the edge of an HTML div's border) are used to color in the pixels of a surface so that the surface "displays" those rasterized primitives.