Changes

• Add the enter-fullscreen class to any element in your presentation to turn it into fullscreen trigger (@hakimel)
• Video backgrounds now continue to play seamlessly across multiple slides (@hakimel)

Fixes

• MathJax3 plugin now works with in non-singleton reveal.js instances (@jokester in #3595)
• Changing slides via swipe gestures now works when swiping on videos—unless their controls are visible (@hakimel)
• Fix exception when destroying uninitialized reveal.js instance (@hakimel in #3593)
• Fix videos restarting each time a fragment is shown (@hakimel in #2882)
• Fix broken backwards navigation in RTL mode (@hakimel)
• Fix error when the notes plugin receives a non-string message (@NatKarmios in #3588)
• Fix question mark shortcut on non-English keyboard layouts (@lechten in #3603)
• Fix r-stack overflow behavior in Chromium browsers (@alifeee in #3598)

Full Changelog: 5.0.5...5.1.0