I was a bit surprised to see Mozilla admitting that HEVC exists without smearing it. If only they could be this impartial in their video comparisons. Instead we had to endure the embarrassing spectacle of them trying to argue that Theora was competitive with H.264[1].
Mozilla has never made any statement that Theora is competitive with H.264; various people (both who work for Mozilla and around the community) have made such statements, but they don't speak for Mozilla.
[1] http://weblogs.mozillazine.org/asa/archives/2009/06/theora_v...