Did not like - I didn't see much effect, but it seemed to mess with YouTube Enhancer, which I love. Had to disable it. Besides it's features seem not something that has ever bothered me, and I like transparency to look like it's meant - no checkerboard, it's not an image manipulation program, it's a document viewer we're using.

This extension still has some SVG display problems. Short, wide SVG files (at least the ones I have, which are rendered properly in Inkscape and a standalone viewer) are displayed hard left and shown with white padding extending variably past the right margin. However, they are centered properly in the vertical dimension. Scaling is another SVG issue--unlike with bitmaps, SVGs don't automatically fill the browser window. Still, I appreciate the improvement on the built-in SVG viewer.