The website seems to suggest that Firefox doesn't support VP9, but my research suggests that it supports it since 2013-12-06 (https://www.webmproject.org/vp9/ h

The website seems to suggest that Firefox doesn't support VP9, but my research suggests that it supports it since 2013-12-06 (https://www.webmproject.org/vp9/ https://www.webmproject.org/vp9/).