Can you add support for compressed file with bzip2 and xz like with gzip file (svgz).
Why not. I'll try to take a look a it after 0.47 is launched.
Adding other compression formats support may be a bit difficult. Maybe as an option in the SVG+media extension?
Bug watches keep track of this bug in other bug trackers.
Why not. I'll try to take a look a it after 0.47 is launched.