more reference by caniuse.com
Canvas:
IE9+ Safari 4+ Opera 10+ Chrome 4+ Firefox 3.6+
Object.defineProperty for pure object:
IE9+ Safari 6+ Opera 15+ Chrome 23+ Firefox 21+
Object.create:
IE9+ Safari 5+ Opera 11.6+ Chrome 5+ Firefox 4+
DOMNodeRemoved:
IE9+ Safari 4+ Opera 15+ Chrome 15+ Firefox 6+
Date.now:
IE9+ Safari 4+ Opera 10.5+ Chrome 5+ Firefox 3.0+
Array.isArray:
IE9+ Safari 5+ Opera 10.5+ Chrome 5+ Firefox 4+
So, the library should work fine on the following browsers.
- IE9+
2011.3.14 - Safari 6+
2012.7.25 - Opera 15+
2013.7.2 - Chrome 23+
2012.9.25 - Firefox 21+
2013.4.2
For not support browsers it will fail quietly.