@BarnabyWalters The videos should be working in Firefox (will test on nightly). If not, it’s a bug. Somewhat limited by Vimeo in formats.

@indie not working in FF 31 or Nightly 34.0a1 OS X 10.9.4 due to patent-encumbered encoding, screenshots:

See notes on for more details

Vimeo actively blames users for using free software, do not recommend.