WebRender unfortunately doesn't handle vector content at all, so all vector content in Firefox is rendered using CPU (CPU part of Skia). This is not true of other browsers.
I think SVG filters are actually all raster effects, which is why WebRender supposedly can accelerate SVG filters... though if it does, I seem to be hitting cases that force it to fall back. Maybe it doesn't like SMIL animations.
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WebRender unfortunately doesn't handle vector content at all, so all vector content in Firefox is rendered using CPU (CPU part of Skia). This is not true of other browsers.
I think SVG filters are actually all raster effects, which is why WebRender supposedly can accelerate SVG filters... though if it does, I seem to be hitting cases that force it to fall back. Maybe it doesn't like SMIL animations.