I don't know why the GP said "minority browser", but to be fair to them, it appears that Mozilla removed MNG and JNG in 2003[1], when that certainly was a fair description of the Mozilla Suite and Phoenix/Firebird/Firefox marketshare.
Interesting to see Hixie in there advocating for MNG (or, rather, for a format with 8-bit alpha and animation that's not Flash).
Interesting to see Hixie in there advocating for MNG (or, rather, for a format with 8-bit alpha and animation that's not Flash).
[1] https://bugzilla.mozilla.org/show_bug.cgi?id=195280